| 400 Men Overall 2012 to 53.0 | Head to Head Top 10 |
| Please refer to the UKA selection policy for full information on Olympic standards. In order for the mark to be a "Current A Standard", it must have been set from 1st April 2012. |
| Rank | Perf | | | PB | | Name | | Year | Coach | Club | Venue | Date | |
| 1 | 44.92 | | | 44.45 | | Martyn Rooney | | 3 | Nick Dakin | Croydon | Walnut CA, USA | 21 Apr 12 |  |
| 2 | 45.08 | | | 45.06 | | Conrad Williams | | 8 | Linford Christie | Kent | Geneva, SUI | 2 Jun 12 | |
| 3 | 45.11 | | | 45.11 | PB | Nigel Levine | | 1 | Linford Christie | Windsor Slough Eton & Hounslow | Oslo, NOR | 7 Jun 12 | |
| 4 | 45.23 | | | 45.23 | PB | Luke Lennon-Ford | | 1 | Linford Christie | Birchfield H | Geneva, SUI | 2 Jun 12 | |
| UKA OLYMPIC STANDARD: 45.30 |
| 5 | 45.47 | | | 45.01 | | Robert Tobin | | 7 | Dan Pfaff | Basingstoke & Mid Hants | Geneva, SUI | 2 Jun 12 | |
| 6 | 45.61 | | | 45.61 | PB | Richard Buck | | 4 | Steve Fudge | City of York | Geneva, SUI | 2 Jun 12 | |
 UK 10 TARGET: 45.70 |
| 7 | 45.77 | | | 45.77 | PB | Louis Persent | U23 | -1 | Stephen Garnham | Colchester H | Geneva, SUI | 2 Jun 12 | |
| 8 | 45.83 | | | 44.94 | | Andrew Steele | | 6 | Stephen Ball | Trafford | Nottwil, SUI | 30 Jun 12 | |
| 9 | 45.87 | | | 44.74 | | Michael Bingham | | 4 | Scott Hall | Birchfield H | Ponce, PUR | 12 May 12 | |
| UKA OLYMPIC B STANDARD: 45.90 |
| 10 | 45.99 | | | 45.99 | PB | Jack Green 🐊 | U23 | -2 | Malcolm Arnold | Kent | Crystal Palace | 14 Jul 12 | |
| 11 | 46.00 | | | 45.09 | | Jarryd Dunn | U23 | -3 | Keith Holt | Birchfield H | Birmingham | 23 Jun 12 | |
| 12 | 46.02 | | | 45.59 | | Chris Clarke | U23 | -1 | Nick Dakin | Marshall Milton Keynes | Walnut CA, USA | 21 Apr 12 | |
| 13 | 46.08 | | | 45.48 | | Richard Strachan | | 4 | Linford Christie | Trafford | Newham | 27 Jun 12 | |
| 14 | 46.15 | | | 45.84 | | Graham Hedman | | 11 | Nick Dakin | Woodford Green Essex Ladies | Geneva, SUI | 2 Jun 12 | |
| 15 | 46.35 | | | 46.35 | PB | Richard Davenport | | 5 | Nick Dakin | Newham & Essex Beagles | Loughborough | 30 May 12 | |
| 16 | 46.51 | | | 46.37 | | Tom Druce | | 4 | Simon Duberley | Channel Islands | Velenje, SLO | 14 Jun 12 | |
| 17 | 46.52 | | | 46.52 | PB | Michael Warner | U23 | -1 | Grant Barker | Notts | Glasgow | 30 Jun 12 | |
| 18 | 46.74 | i | | 46.74i | PB | James Forman | U23 | -2 | Andy Forman | Isle of Wight | Birmingham | 19 Feb 12 | |
| 19 | 46.76 | | | 46.76 | PB | Thomas Phillips | | 1 | | City of Sheffield | Berkeley CA, USA | 28 Apr 12 | |
| 19 | 46.76 | | | 46.76 | PB | Tim Burn | U23 | -1 | Martyn Jones | City of Sheffield | Liverpool | 18 Aug 12 | |
| 21 | 46.88 | | | 46.88 | PB | David Riley | | 6 | Jared Deacon | Gateshead | Loughborough | 20 May 12 | |
| 22 | 46.94 | | | 46.06 | | Jamie Bowie | | 1 | Piotr Haczek | Inverness | Leiden, NED | 9 Jun 12 | |
| 23 | 46.97 | | | 46.37 | | Kris Robertson | | 3 | Piotr Haczek | Shaftesbury Barnet | Cardiff | 18 Jul 12 | |
| 24 | 46.98 | i | | 46.98i | PB | Luke Smallwood | | 2 | Paul Slythe | Blackheath & Bromley | Birmingham | 19 Feb 12 | |
| 49.21 | | | | | | | | | | Eltham | 14 Jul 12 | |
| 50.1 | | | | | | | | | | Canterbury | 1 Sep 12 | |
| 25 | 46.99 | | | 46.48i | | Sebastian Rodger | U23 | -2 | Stephen King | Shaftesbury Barnet | Hendon | 21 Jul 12 | |
| 26 | 47.00 | | | 47.00 | PB | Harry Doran | U23 | -1 | Raymond Twentyman | Liverpool Pembroke Sefton | Hendon | 28 Jul 12 | |
| 27 | 47.03 | | | 47.03 | PB | Alex Boyce | U20 | -5 | Robert Roberts | Liverpool H | Liverpool | 18 Aug 12 | |
| 28 | 47.05 | | | 45.45 | | George Caddick | U20 | -5 | | Sale Harriers Manchester | Gateshead | 7 Jul 12 | |
| 29 | 47.14 | | | 45.84 | | Daniel Awde | | 2 | Greg Richards | Woodford Green Essex Ladies | Arona, ESP | 26 May 12 | |
| 30 | 47.17 | | | 46.02 | | Dan Putnam | U23 | -2 | Jared Deacon | Blackheath & Bromley | Derby | 28 Jul 12 | |
| 31 | 47.23 | | | 46.82 | | Nathan Woodward | | 1 | Nick Dakin | Tamworth | Walnut CA, USA | 20 Apr 12 | |
| 32 | 47.25 | | | 46.74 | | Clovis Asong | U20 | -5 | Keith Hunter | Sale Harriers Manchester | Gateshead | 7 Jul 12 | |
| 33 | 47.29 | | | 47.29 | PB | Richard Yates | | 4 | Stephen Ball | Kent | Oordegem, BEL | 26 May 12 | |
| 34 | 47.32 | | | 46.51 | | Somto Eruchie | | 4 | Tony Hadley | Birchfield H | Gainesville FL, USA | 21 Apr 12 | |
| 35 | 47.43 | | | 47.43 | PB | Lawrence Wooldridge | | 1 | Clarence Callender | Kent | Birmingham | 3 Jun 12 | |
| 36 | 47.53 | | | 46.26 | | Rory Evans | | 1 | | Stockport | Loughborough | 20 May 12 | |
| 37 | 47.62 | | | 47.62 | PB | Jay Younger | U20 | -5 | | Edinburgh AC | Oordegem, BEL | 26 May 12 | |
| 38 | 47.68 | | | 47.68 | PB | David Guest | U23 | -2 | Mike Guest | Bridgend | Loughborough | 7 Jul 12 | |
| 39 | 47.73 | | | 46.88i | | David Lagerberg | U20 | -4 | | Mansfield | Stretford | 17 Jul 12 | |
| 40 | 47.75 | | | 47.65 | | Ben Sumner | | 7 | Stephen Ball | Enfield & Haringey | Eton | 18 Aug 12 | |
| 41 | 47.77 | | | 46.61 | | Omar Simpson | | 1 | Daniel Cossins | Bristol & West | Bedford | 10 Jun 12 | |
| 41 | 47.77 | | | 47.77 | PB | Sylvester Juwe | | 12 | | Woodford Green Essex Ladies | Hendon | 30 Jun 12 | |
| 43 | 47.88 | | | 46.96 | | Zak Curran | U20 | -4 | Conrad Milton | Windsor Slough Eton & Hounslow | Woking | 1 Aug 12 | |
| 44 | 47.91 | | | 47.91 | PB | Matt Sinclair | | 4 | John Powell | Crawley | Bromley | 18 Aug 12 | |
| 45 | 47.92 | | | 47.92 | PB | Marcus Hunt | U23 | -1 | Brian MacKenzie | Chelmsford | Olympic Park | 7 May 12 | |
| 45 | 47.92 | | | 46.21 | | Ben Snaith | U17 | -6 | Mick Graham | Cambridge & Coleridge | Bedford | 19 Aug 12 | |
| 47 | 47.95 | | | 47.11 | | Farren Morgan | U20 | -4 | Christopher Harris | Bexley | Bedford | 17 Jun 12 | |
| 47 | 47.95 | | | 47.51 | | Peter Phillips | | 4 | Ivor Patrick Northey | Herne Hill | Eton | 18 Aug 12 | |
| 49 | 47.98 | | | 45.52 | | Malachi Davis | | 13 | | Woodford Green Essex Ladies | Eagle Rock CA, USA | 5 May 12 | |
| 50 | 47.99 | | | 47.72 | | Luke Edwards | U23 | -1 | | City of Sheffield | Liverpool | 18 Aug 12 | |
| 51 | 48.00 | | | 48.00 | PB | Guy Learmonth | U23 | -3 | George Gandy | Lasswade | Glasgow (S) | 3 Jun 12 | |
| 52 | 48.0 | | | 48.02/48.0 | PB | Stewart Challis | U23 | -2 | Neil Dodson | Windsor Slough Eton & Hounslow | Hendon | 28 Jul 12 | |
| 48.02 | | | | | | | | | | Lee Valley | 27 May 12 | |
| 53 | 48.01 | | | 47.83 | | Sam Peters | U23 | -1 | Paul Batten | Exeter | Olympic Park | 7 May 12 | |
| 54 | 48.04 | | | 46.23 | | Owen Smith | U20 | -5 | Caroline Sayer | Deeside AAC | Stretford | 5 Jun 12 | |
| 55 | 48.05 | | | 45.47 | | Efekemo Okoro | U23 | -3 | Simon Duberley | Birchfield H | Hendon | 30 Jun 12 | |
| 56 | 48.06 | | | 46.75 | | Patrick Swan | | 2 | Stuart Hogg | Sale Harriers Manchester | Bedford | 25 Aug 12 | |
| 57 | 48.08 | | | 48.08 | PB | Lumar Sylvester | U23 | -2 | Clarence Callender | Thames Valley | Irvine CA, USA | 29 Apr 12 | |
| 58 | 48.1 | | | 46.02 | | Theo Campbell | U23 | -2 | Paul Weston | Bristol & West | Cheltenham | 5 May 12 | |
| 59 | 48.16 | | | 48.16 | PB | Zach King | U23 | -3 | | Notts | Bromley | 18 Aug 12 | |
| 59 | 48.16 | | | 47.52 | | Rick Beardsell | | 11 | Stephen Ball | City of Sheffield | Stretford | 28 Aug 12 | |
| 61 | 48.17 | i | | 47.17 | | Niall Flannery | U23 | -2 | Nick Dakin | Gateshead | Sheffield | 26 Feb 12 | |
| 48.34 | | | | | | | | | | Loughborough | 28 Apr 12 | |
| 49.3 | | | | | | | | | | Hendon | 28 Jul 12 | |
| 62 | 48.22 | | | 47.57 | | Anthony Young | U23 | -3 | Paul Allan | Pitreavie | Bedford | 25 Aug 12 | |
| 63 | 48.25 | | | 47.15 | | Nick Petrou | U17 | -7 | John Baron | Leeds City | Bedford | 19 Aug 12 | |
| 64 | 48.27 | | | 48.27 | PB | Rion Pierre-Forde | | 3 | Linford Christie | Windsor Slough Eton & Hounslow | Mesa AZ, USA | 28 Apr 12 | |
| 65 | 48.30 | | | 46.68/46.5 | | Dale Garland | | 10 | | Channel Islands | Stretford | 17 Jul 12 | |
| 66 | 48.35 | | | 48.35/48.3 | PB | Andrew Kendall | U23 | -1 | Claire Tompsett | Crawley | Birmingham | 2 Jun 12 | |
| 67 | 48.36 | | | 47.96 | | Mo Abdullahi | U23 | -2 | | City of Portsmouth | Olympic Park | 6 May 12 | |
| 68 | 48.41 | | | 47.96 | | Sam Bedford | U20 | -5 | | Wells City | Exeter | 23 Jun 12 | |
| 69 | 48.42 | | | 48.10 | | Ashley Bryant | U23 | -2 | Ian Grant | Windsor Slough Eton & Hounslow | Desenzano del Garda, ITA | 5 May 12 | |
| UK 100 TARGET: 48.43 |
| 70 | 48.44 | | | 48.01 | | John Lane | | 1 | Toni Minichiello | City of Sheffield | Desenzano del Garda, ITA | 5 May 12 | |
| 70 | 48.44 | | | 47.85 | | Callum Roughneen | U20 | -5 | John Smith | Sale Harriers Manchester | Hendon | 30 Jun 12 | |
| 72 | 48.46 | | | 47.12 | | Christian Byron | U23 | -3 | Tony Hadley | Birchfield H | Birmingham | 3 Jun 12 | |
| 72 | 48.46 | | | 48.44i | | Daniel Heald | U20 | -6 | Keith Hunter | Sale Harriers Manchester | Stretford | 5 Jun 12 | |
| 72 | 48.46 | | | 48.43 | | Samuel Cordin | | 1 | John Brant | Mansfield | Eton | 18 Aug 12 | |
| 75 | 48.49 | | | 47.65 | | Toby Ulm | | 1 | Howard Moscrop | Swindon | Fairfax VA, USA | 14 Apr 12 | |
| 76 | 48.5 | | | 47.99 | | Ben Sturgess | U23 | -3 | Mike Leonard | Marshall Milton Keynes | Walton | 9 Jun 12 | |
| 48.59 | | | | | | | | | | Peterborough | 21 Apr 12 | |
| 77 | 48.51 | | | 48.13 | | Lawrence Croll Mensah | | 6 | Ivor Patrick Northey | Herne Hill | Lee Valley | 27 May 12 | |
| 78 | 48.53 | i | | 48.43i | | Luke South | U20 | -4 | Mike Corden | City of Sheffield | Sheffield | 14 Jan 12 | |
| 48.69 | | | | | | | | | | Loughborough | 20 May 12 | |
| 79 | 48.55 | | | 48.39 | | Darrellon Holding | U20 | -4 | Tim Needham | Nene Valley | Eton | 18 Aug 12 | |
| 80 | 48.56 | | | 47.74 | | Ollie Smith | U20 | -4 | Roy Dickens | Chichester | Bedford | 25 Aug 12 | |
| 81 | 48.57 | | | 47.81/47.8 | | Jake King | U20 | -4 | Keith Palmer | Southend | Crystal Palace | 8 Jul 12 | |
| 82 | 48.59 | | | 47.56i | | Lawrence Baird | | 13 | | Trafford | Birmingham | 2 Jun 12 | |
| 83 | 48.60 | | | 47.90 | | Tom Miller | | 1 | | Cardiff | Lee Valley | 27 May 12 | |
| 84 | 48.6 | | | 48.01 | | Paul Goodall | | 4 | Alasdair Donaldson | City of Norwich | Kettering | 19 Aug 12 | |
| 48.97 | | | | | | | | | | Stretford | 31 Jul 12 | |
| 85 | 48.64 | | | 48.64 | PB | Baba Tindogo | V35 | 16 | Michael Whittaker | Newham & Essex Beagles | Newham | 23 May 12 | |
| 86 | 48.65 | | | 47.53 | | Hodson Harding | U20 | -5 | | Unattached | Coquitlam, CAN | 14 Jul 12 | |
| 86 | 48.65 | | | 48.65 | PB | Dean Showler-Davis | | 6 | Bill Jewers | Basingstoke & Mid Hants | Stoke | 4 Aug 12 | |
| 88 | 48.66 | | | 48.31 | | Lolu Oluwole-Ojo | U20 | -5 | Marina Armstrong | Windsor Slough Eton & Hounslow | Hendon | 12 Aug 12 | |
| 88 | 48.66 | | | 48.66 | PB | Dereece O'Callaghan | U17 | -7 | Jane Dixon | Shaftesbury Barnet | Derby | 9 Sep 12 | |
| 90 | 48.67 | | | 48.46 | | Nicholas Little | | 6 | | Gateshead | Perth, AUS | 18 Jan 12 | |
| 90 | 48.67 | | | 47.72 | | Hamim Lubega | | 4 | Chris Zah | Shaftesbury Barnet | Derby | 27 May 12 | |
| 90 | 48.67 | | | 48.67 | PB | Ross Allen | U23 | -2 | Darrell Maynard | Rugby & Northampton | Birmingham | 8 Jul 12 | |
| 90 | 48.67 | | | 47.72 | | Tyler Johnson | U23 | -2 | Ronald Blank | City of Plymouth | Derby | 28 Jul 12 | |
| 94 | 48.69 | | | 47.29 | | Nicholas Kanonik | | 3 | | Birchfield H | Dublin (S), IRL | 25 Jul 12 | |
| 94 | 48.69 | | | 48.58 | | Martyn Paterson | U23 | -3 | Stuart Hogg | Shaftesbury Barnet | Liverpool | 18 Aug 12 | |
| 96 | 48.7 | | | 49.53i/48.7 | PB | Liam Clowes | U23 | -3 | Steven Walker | Crewe & Nantwich | Salford | 5 May 12 | |
| 96 | 48.7 | | | 47.91 | | Scott Atkinson | U20 | -6 | Christopher Bedford | Wakefield | Halifax | 5 Aug 12 | |
| 48.90 | | | | | | | | | | Edinburgh | 12 Aug 12 | |
| 98 | 48.73 | | | 48.22 | | Martin Lipton | | 1 | | Liverpool H | Birmingham | 9 Jun 12 | |
| 99 | 48.75 | | | 48.18 | | Isaac Ogunlade | U23 | -2 | Chris Zah | Havering | Tooting Bec | 21 Jul 12 | |
| 100 | 48.77 | | | 47.67 | | Glyn Hawkes | | 2 | Steve Fudge | Cardiff | Lee Valley | 27 May 12 | |
| 100 | 48.77 | | | 48.77 | PB | Jordan Bransberg | U20 | -6 | Andrew Medley | Skyrac | Stretford | 17 Jul 12 | |
| 102 | 48.79 | | | 47.96i | | Iain Bray | | 2 | Darrell Maynard | Basingstoke & Mid Hants | Birmingham | 2 Jun 12 | |
| 103 | 48.84 | | | 48.84 | PB | Blair Crawford | U23 | -3 | Kevin Reynolds | Kilbarchan | Glasgow (S) | 3 Jun 12 | |
| 104 | 48.86 | | | 48.42 | | Omari Markland-Montgomery | U20 | -4 | | Cambridge H | Eton | 18 Aug 12 | |
| 105 | 48.88 | | | 48.88 | PB | Joe Robertshaw | U17 | -7 | | Gateshead | Gateshead | 6 Jul 12 | |
| 106 | 48.90 | | | 48.90 | PB | Rhys Knapman | U23 | -1 | Matt Elias | Cardiff | Cardiff | 12 May 12 | |
| 107 | 48.9 | | | 46.97 | | Tom Burton | | 2 | Nick Dakin | Tamworth | Tamworth | 27 May 12 | |
| 49.19 | | | | | | | | | | Birmingham | 9 Jun 12 | |
| 108 | 48.91 | i | | 47.88 | | Paul Judson | | 4 | | Notts | Birmingham | 12 Feb 12 | |
| 49.31 | | | | | | | | | | Derby | 28 Jul 12 | |
| 108 | 48.91 | | | 48.91/48.9 | PB | Harry McQueen | U23 | -2 | Brian MacKenzie | Chelmsford | Chelmsford | 13 May 12 | |
| 108 | 48.91 | | | 48.91 | PB | Ben Morris | U23 | -2 | Glenys Morton | Leicester | Loughborough | 13 Jun 12 | |
| 111 | 48.92 | | | 48.92 | PB | John Houston | U23 | -1 | Phil Snoddy | Liverpool H | Tullamore, IRL | 24 Jun 12 | |
| 112 | 48.94 | | | 48.08 | | Jonathan Elderfield | | 4 | | Basingstoke & Mid Hants | Bromley | 18 Aug 12 | |
| 113 | 48.95 | i | | 47.40 | | Samuel Adeyemi | U23 | -1 | | Herne Hill | Birmingham | 4 Feb 12 | |
| 49.47 | | | | | | | | | | Olympic Park | 5 May 12 | |
| 113 | 48.95 | | | 48.06 | | James Alaka | | 1 | Clarence Callender | Blackheath & Bromley | Los Angeles CA, USA | 24 Mar 12 | |
| 115 | 48.96 | | | 47.36 | | Ben Carne | | 4 | Richard Wheater | Harrow | Lee Valley | 27 May 12 | |
| 116 | 48.97 | | | 46.96 | | Greg Louden | U23 | -3 | Dave Finlayson | Lasswade | Edinburgh | 21 Apr 12 | |
| 116 | 48.97 | | | 47.93 | | Matthew Chant | U17 | -7 | James Coney | Andover | Gateshead | 6 Jul 12 | |
| 118 | 48.99 | | | 48.66 | | Lloyd King | U23 | -2 | Ron Roddan | Thames Valley | Lee Valley | 27 May 12 | |
| 119 | 49.01 | | | 49.01 | PB | Matthew Constable | U20 | -5 | | Ipswich | Birmingham | 2 Jun 12 | |
| 120 | 49.03 | | | 49.03 | PB | Andrew Walshe | U20 | -5 | Catherine Walker | Herts Phoenix | Crystal Palace | 8 Jul 12 | |
| 121 | 49.07 | | | 48.93 | | Chris Chancellor | U20 | -4 | Carlo Monticolombi | Invicta East Kent | Woking | 1 Aug 12 | |
| 122 | 49.09 | | | 47.14 | | Jack Houghton | U20 | -4 | | Doncaster | Don Valley | 22 Apr 12 | |
| 122 | 49.09 | | | 49.09 | PB | Elliot Slade | U20 | -5 | Arwyn Davies | Cardiff | Cardiff | 25 Aug 12 | |
| 124 | 49.10 | | | 48.94 | | Jonathan Osbourne | U20 | -5 | Marina Armstrong | Hercules Wimbledon | Bedford | 16 Jun 12 | |
| 125 | 49.1 | | | 46.35 | | Jack Crosby | U20 | -6 | | Middlesbrough (Mandale) | York | 26 May 12 | |
| 49.23 | | | | | | | | | | Gateshead | 12 May 12 | |
| 125 | 49.1 | | | 48.04 | | Nathan Hilton | U23 | -1 | | Liverpool Pembroke Sefton | Ellesmere Port | 5 Aug 12 | |
| 49.21 | | | | | | | | | | Bedford | 16 Jun 12 | |
| 127 | 49.11 | | | 48.28 | | Ben Robbins | U17 | -7 | | Edinburgh AC | Derby | 9 Sep 12 | |
| 128 | 49.13 | | | 48.28 | | Sean Adams | U20 | -4 | Todd Bennett | Southampton | Milton Keynes | 1 Sep 12 | |
| 129 | 49.16 | | | 47.23 | | James Hunter | U23 | -1 | James Hillier | Liverpool H | Exeter | 15 Jul 12 | |
| 130 | 49.17 | | | 49.17 | PB | Cameron Irwin | U23 | -3 | Ian Grant | Colchester H | Watford | 16 May 12 | |
| 130 | 49.17 | | | 48.44 | | Ben Green | | 4 | | Warrington AC | Nottwil, SUI | 30 Jun 12 | |
| 132 | 49.18 | | | 48.53 | | Akeem Akintokun | U20 | -4 | Vespa Ellis | Newham & Essex Beagles | Chelmsford | 13 May 12 | |
| 132 | 49.18 | | | 49.18 | PB | Robbie Stenhouse | U20 | -6 | Andrew Winnie | Jersey | Grangemouth | 25 Aug 12 | |
| 134 | 49.19 | | | 49.19 | PB | David Gain | U23 | -1 | Tony Palman-Brown | Oxford City | Horspath | 5 Sep 12 | |
| 135 | 49.20 | | | 49.20 | PB | Addlight Magwidi | | 2 | Carlo Monticolombi | Invicta East Kent | Olympic Park | 6 May 12 | |
| 136 | 49.2 | | | 48.40 | | David Dempsey | U23 | -2 | Matthew Wood | Gateshead | Liverpool | 22 Apr 12 | |
| 49.49 | i | | | | | | | | | Sheffield | 25 Feb 12 | |
| 49.57 | | | | | | | | | | Hendon | 28 Jul 12 | |
| 136 | 49.2 | | | 48.54/48.4 | | Martin Bradbury | | 8 | | City of Sheffield | Doncaster | 5 May 12 | |
| 49.28 | | | | | | | | | | Peterborough | 21 Jul 12 | |
| 138 | 49.21 | | | 48.38 | | Chris Greenaway | | 3 | Janet Smith | Bournemouth | Eton | 18 Aug 12 | |
| 139 | 49.22 | | | 48.34 | | Wayne Ashall | U23 | -1 | Raymond Twentyman | Liverpool Pembroke Sefton | Birmingham | 2 Jun 12 | |
| 140 | 49.23 | | | 48.31 | | Nicholas Pryce | U23 | -3 | Joe Caines | Royal Sutton Coldfield | Bedford | 16 Jun 12 | |
| 141 | 49.24 | | | 49.24 | PB | Michael Nevill | U23 | -2 | Phillip Brickley | Reading AC | Woking | 1 Aug 12 | |
| 142 | 49.27 | | | 48.53 | | Gareth Hopkins | U23 | -2 | Helen Patricia James | Cardiff | Cardiff | 18 Jul 12 | |
| 143 | 49.29 | | | 48.65/48.6 | | Ronnie Young | U20 | -6 | Todd Bennett | Southampton | Exeter | 15 Jul 12 | |
| 144 | 49.30 | | | 47.84/47.6 | | Chris Tandi | U23 | -1 | | City of Portsmouth | St. Peter Port | 9 Jun 12 | |
| 145 | 49.3 | | | 50.17/49.3 | PB | Sam Dykes | U20 | -4 | Philip Hicken | Warrington AC | Warrington | 26 May 12 | |
| 146 | 49.33 | i | | 47.80 | | David Martin | | 2 | Sheila Atkinson | Victoria Park City of Glasgow | Glasgow | 19 Feb 12 | |
| 147 | 49.35 | i | | 47.92 | | Paul Bennett | U23 | -3 | Matt Elias | Swansea | Cardiff | 29 Jan 12 | |
| 49.8 | | | | | | | | | | Newport | 21 Jul 12 | |
| 49.88 | | | | | | | | | | Cardiff | 14 Jul 12 | |
| 147 | 49.35 | | | 49.26 | | Jacob Fehily | | 1 | | Trafford | Stretford | 3 Jul 12 | |
| 147 | 49.35 | | | 49.27 | | Conor McLaughlin | | 1 | Callum Orr | Strabane | Woodford | 11 Sep 12 | |
| 150 | 49.36 | | | 47.78 | | Jonathan Hornblow | | 3 | Matt Elias | Derby | Olympic Park | 6 May 12 | |
| 151 | 49.37 | | | 47.94 | | Chris Smith | | 1 | | Wirral | Huntsville TX, USA | 3 May 12 | |
| 151 | 49.37 | | | 48.34 | | Joseph Kinsey | U20 | -6 | Keith Holt | Birchfield H | Derby | 9 Sep 12 | |
| 153 | 49.40 | | | 49.40 | PB | Robert Ridley | | 2 | Darrell Maynard | Newbury | Watford | 16 May 12 | |
| 153 | 49.40 | | | 48.71 | | Gus Kennedy | U23 | -3 | Nick Dakin | Brighton Phoenix | Loughborough | 20 May 12 | |
| 153 | 49.40 | | | 48.79 | | Caspar Eliot | | 1 | Mark Thomas | Bristol & West | Eton | 18 Aug 12 | |
| 156 | 49.4 | | | 49.35 | | Oliver Aitchison | U23 | -3 | | Aldershot, Farnham & District | Woking | 30 Jun 12 | |
| 50.77 | | | | | | | | | | Watford | 18 Apr 12 | |
| 157 | 49.41 | | | 46.86 | | Nathan Wake | U23 | -3 | Ayo Falola | Woodford Green Essex Ladies | Bedford | 10 Jun 12 | |
| 157 | 49.41 | | | 49.22i/49.2 | | Brendan Murphy | | 4 | | Liverpool H | Dublin (S), IRL | 20 Jun 12 | |
| 159 | 49.42 | | | 47.84 | | Jacob Paul | U20 | -6 | Marina Armstrong | Windsor Slough Eton & Hounslow | Bromley | 22 Jul 12 | |
| 160 | 49.43 | i | | 47.97 | | Dale Willis | | 2 | Bill Boyd | Corby | Birmingham | 12 Feb 12 | |
| 49.47 | | | | | | | | | | Birmingham | 2 Jun 12 | |
| 50.0 | | | | | | | | | | Corby | 27 May 12 | |
| 160 | 49.43 | i | | 48.87 | | Christopher Wakeford | | 1 | Colin Bovell | Sale Harriers Manchester | Sheffield | 25 Feb 12 | |
| 50.24 | | | | | | | | | | Birmingham | 8 Jul 12 | |
| 162 | 49.45 | | | 48.87 | | Jonathan Williams | | 5 | | Llanelli | Swansea | 18 Aug 12 | |
| 162 | 49.45 | | | 48.11 | | Ryan Lee | U17 | -7 | David Norton | Cwmbran | Cardiff | 22 Aug 12 | |
| 164 | 49.47 | | | 49.22 | | Martin Brockman | | 3 | Chris Bowman | Medway & Maidstone | Blacktown, AUS | 7 Jan 12 | |
| 165 | 49.48 | | | 47.61 | | Adam McComb | U23 | -3 | | North Down | Antrim | 4 Jun 12 | |
| 166 | 49.50 | | | 47.69 | | Michael Edwards | U20 | -4 | | Enfield & Haringey | Lee Valley | 27 May 12 | |
| 166 | 49.50 | | | 48.69 | | Reece Ingley | U23 | -3 | Stephen Ball | Trafford | Swansea | 18 Aug 12 | |
| 168 | 49.5 | | | 47.52 | | Dwayne Lewis | | 3 | Joe Caines | Birchfield H | Cheltenham | 5 May 12 | |
| 50.08 | | | | | | | | | | Birmingham | 22 Apr 12 | |
| 168 | 49.5 | | | 48.06 | | Ed Aston | | 2 | | Cambridge & Coleridge | Birmingham (Un) | 30 May 12 | |
| 170 | 49.51 | | | 48.81 | | Sean Molloy | U17 | -6 | Mark Hookway | Tonbridge | Croydon | 20 May 12 | |
| 170 | 49.51 | | | 49.51 | PB | Matt McLaughlin | U20 | -5 | Ayo Falola | Woodford Green Essex Ladies | Lee Valley | 14 Jul 12 | |
| 172 | 49.53 | | | 47.43 | | Jonathan Browne | | 7 | Clarence Callender | Kent | Crawley | 8 Apr 12 | |
| 172 | 49.53 | | | 48.52 | | David Eames | U23 | -2 | Callum Orr | Newbury | Birmingham | 2 Jun 12 | |
| 172 | 49.53 | | | 49.39/49.1 | | Josh Evans | U17 | -6 | Sandra Woodman | Yate | Gateshead | 6 Jul 12 | |
| 172 | 49.53 | | | 48.32 | | Tom Moakes | U23 | -1 | Nick Dakin | Notts | Birmingham | 8 Jul 12 | |
| 176 | 49.54 | | | 48.55 | | Rory Graham-Watson | U23 | -1 | Rodger Hughes | Windsor Slough Eton & Hounslow | Parliament Hill | 12 Sep 12 | |
| 177 | 49.55 | | | 49.55 | PB | Richard Holt | U23 | -1 | Lee Ness | City of Salisbury | Bedford | 25 Aug 12 | |
| 178 | 49.56 | | | 48.05 | | Omololu Abiodun | U23 | -3 | Gladys Bird | Woodford Green Essex Ladies | Liverpool | 18 Aug 12 | |
| 179 | 49.57 | | | 49.57/49.0 | PB | Jack Hallas | U23 | -2 | Aaron Thomas | Wakefield | Don Valley | 22 Apr 12 | |
| 180 | 49.60 | | | 48.80 | | Joseph Maynard | | 5 | Darrell Maynard | Cardiff | Cardiff | 14 Jul 12 | |
| 181 | 49.6 | | | 48.60 | | Stewart Marshall | | 10 | | Coventry | Stoke | 5 May 12 | |
| 49.87 | i | | | | | | | | | Birmingham | 19 Feb 12 | |
| 50.09 | | | | | | | | | | Birmingham | 2 Jun 12 | |
| 181 | 49.6 | | | 49.14 | | Kevin Sempers | | 5 | Ian Grant | Trafford | Harrow | 19 May 12 | |
| 50.20 | | | | | | | | | | Arona, ESP | 26 May 12 | |
| 181 | 49.6 | | | 50.16/49.6 | PB | Mukhtar Mohammed | U23 | -1 | Mustafa Mohamed | Sheffield RC | Wakefield | 26 May 12 | |
| 181 | 49.6 | | | 48.36/48.3 | | Danny Higham | U23 | -1 | | Liverpool Pembroke Sefton | Ellesmere Port | 1 Jul 12 | |
| 49.68 | | | | | | | | | | Birmingham | 2 Jun 12 | |
| 181 | 49.6 | | | 49.6 | PB | D Seally | | | | Army | Aldershot | 11 Jul 12 | |
| 181 | 49.6 | | | 49.45 | | Aaron Bennett | U23 | -3 | Todd Bennett | Southampton | Walton | 14 Jul 12 | |
| 50.48 | | | | | | | | | | Derby | 28 Jul 12 | |
| 181 | 49.6 | | | 48.95 | | Michael Skee | | 1 | Paul Pinnington | Enfield & Haringey | Hendon | 28 Jul 12 | |
| 49.87 | | | | | | | | | | Olympic Park | 5 May 12 | |
| 181 | 49.6 | | | 48.91 | | Josh Oguntayo | U23 | -3 | Vicente Modahl | Sale Harriers Manchester | Halifax | 5 Aug 12 | |
| 50.23 | | | | | | | | | | Stretford | 3 Jul 12 | |
| 189 | 49.61 | | | 49.50 | | John Bird | U23 | -3 | David Saker | Ipswich | Watford | 18 Apr 12 | |
| 189 | 49.61 | | | 49.61/49.5 | PB | Alex Bale | | 12 | Brian Craig | Blackpool, Wyre & Fylde | Stretford | 5 Jun 12 | |
| 191 | 49.62 | | | 48.44 | | Shaun Cooke | U17 | -7 | Roy Holland | Sutton & District | Bedford | 18 Aug 12 | |
| 192 | 49.64 | | | 46.45 | | Set Osho | | 4 | Jonas Dodoo | Belgrave | Watford | 16 May 12 | |
| 193 | 49.7 | | | 49.82/49.7 | PB | Scott Parsons | U20 | -4 | David Brown | Biggleswade | Bedford | 21 Apr 12 | |
| 50.39 | i | | | | | | | | | Birmingham | 25 Feb 12 | |
| 50.65 | | | | | | | | | | Woodford | 23 Jun 12 | |
| 193 | 49.7 | | | 48.22 | | Liam Grey Thompson | U20 | -4 | Ty Holden | Barnet | Stevenage | 12 Aug 12 | |
| 49.83 | | | | | | | | | | Abingdon | 26 May 12 | |
| 193 | 49.7 | | | 47.32 | | Jack Wightman | U17 | -6 | Laurence Garnham | Newquay & Par | Carn Brea | 19 Aug 12 | |
| 50.23 | | | | | | | | | | Gateshead | 6 Jul 12 | |
| 196 | 49.71 | i | | 48.88i | | Andrew Raeburn | U23 | -2 | | Caithness AAC | Glasgow | 19 Feb 12 | |
| 197 | 49.72 | | | 47.48 | | Daniel Brandwood | | 8 | John Brant | Sale Harriers Manchester | Sydney, AUS | 15 Dec 12 | |
| 198 | 49.73 | | | 49.73 | PB | Peter Loudon | U20 | -4 | David Campbell | Edinburgh AC | Edinburgh | 21 Apr 12 | |
| 198 | 49.73 | | | 46.49 | | Edmond Amaning | U20 | -4 | John Powell | Thames Valley | Namur, BEL | 16 May 12 | |
| 198 | 49.73 | | | 48.79 | | Daniel Dell | | 2 | Helen Patricia James | Cardiff | Eton | 18 Aug 12 | |
| 201 | 49.74 | | | 47.42 | | Joseph Reid | U17 | -7 | Matt Elias | Manx | Gateshead | 7 Jul 12 | |
| 202 | 49.76 | i | | 47.55 | | Matthew Quine | | 1 | Mike Corden | City of Sheffield | Sheffield | 14 Jan 12 | |
| 202 | 49.76 | i | | 48.35 | | Matthew Lavoipierre | U20 | -4 | Bill Jewers | Basingstoke & Mid Hants | Lee Valley | 15 Jan 12 | |
| 50.1 | | | | | | | | | | Basingstoke | 9 Jun 12 | |
| 51.52 | | | | | | | | | | Bromley | 18 Aug 12 | |
| 204 | 49.77 | | | 49.59 | | Abdillah Nassir | U23 | -1 | | Charnwood | Loughborough | 15 Apr 12 | |
| 205 | 49.79 | | | 48.01 | | Ross McDonald | U23 | -1 | Tony Hadley | Birchfield H | Olympic Park | 5 May 12 | |
| 205 | 49.79 | | | 48.58 | | Ben Winstanley | U20 | -4 | Todd Bennett | Southampton | Crystal Palace | 8 Jul 12 | |
| 205 | 49.79 | | | 49.42 | | Nzimah Akpan | U20 | -5 | Adrian Webb | Liverpool H | Stretford | 14 Aug 12 | |
| 208 | 49.80 | | | 48.96 | | Lewis Keeble | U20 | -4 | Paul Keeble | Stevenage & North Herts | Olympic Park | 5 May 12 | |
| 209 | 49.8 | | | 50.36/49.8 | PB | Levi Curtis | U20 | -5 | | Chesterfield | Stoke | 12 Aug 12 | |
| 50.36 | | | | | | | | | | Loughborough | 30 May 12 | |
| 210 | 49.81 | | | 49.81/49.8 | PB | Jordan Aromasodu | U23 | -2 | Chris Zah | Victoria Park & Tower Hamlets | Woodford | 21 Apr 12 | |
| 211 | 49.82 | | | 49.82 | PB | Sam Wareham | U23 | -3 | | Oxford Uni | Abingdon | 31 Mar 12 | |
| 211 | 49.82 | | | 49.82 | PB | Michael Gardiner | V40 | 22 | | Cheltenham | Zittau, GER | 21 Aug 12 | |
| 213 | 49.83 | | | 48.90 | | Michael Baker | U23 | -1 | Fuzz Caan | Woodford Green Essex Ladies | Loughborough | 28 Apr 12 | |
| 213 | 49.83 | | | 49.49 | | Ralph Eliot | U23 | -3 | | Oxford Uni | Oxford | 19 May 12 | |
| 215 | 49.84 | | | 49.84 | PB | Thaddeus Anim-Somuah | U23 | -1 | Brian Scobie | St. Helens Sutton | Watford | 16 May 12 | |
| 216 | 49.85 | | | 46.80 | | Andrew Mellon | U17 | -6 | Claire Scarth | North Down | Olympic Park | 9 May 12 | |
| 217 | 49.86 | | | 49.86 | PB | John Lutwyche | U20 | -4 | Mike Bilson | BRAT | Loughborough | 27 May 12 | |
| 218 | 49.87 | | | 49.55 | | Linus Field | U20 | -5 | Paul MacGregor | St. Mary's Richmond | Bromley | 18 Aug 12 | |
| 219 | 49.88 | | | 48.47 | | Matt Hamilton | | 6 | David Rice | Herts Phoenix | Geneva, SUI | 2 Jun 12 | |
| 220 | 49.90 | | | 49.21/49.0 | | Matthew Dorrington | U20 | -4 | Michael Bazire | Brighton & Hove | Crawley | 22 Apr 12 | |
| 221 | 49.9 | | | 49.97/49.9 | PB | Christopher Youell | U20 | -5 | Jeremy Freeman | Chelmsford | Lee Valley | 21 Apr 12 | |
| 51.33 | | | | | | | | | | Hendon | 12 Aug 12 | |
| 221 | 49.9 | | | 50.35/49.9 | PB | Francis Baker | | 3 | Gareth Lease | Cardiff | Street | 17 May 12 | |
| 50.35 | | | | | | | | | | Stoke | 4 Aug 12 | |
| 221 | 49.9 | | | 49.80i | | Tyson Oladokun | U23 | -2 | Chris Zah | Victoria Park & Tower Hamlets | Chelmsford | 9 Jun 12 | |
| 50.61 | | | | | | | | | | Bedford | 16 Jun 12 | |
| 221 | 49.9 | | | 48.46 | | Daniel Barry | | 2 | | Worthing | Chelmsford | 9 Jun 12 | |
| 50.69 | | | | | | | | | | Basingstoke | 30 May 12 | |
| 221 | 49.9 | | | 50.91/49.9 | PB | Ben Penty | | | | Walton | Walton | 9 Jun 12 | |
| 50.91 | | | | | | | | | | Woking | 1 Aug 12 | |
| 226 | 49.91 | | | 46.79 | | Thomas Somers | U17 | -8 | Geoffrey Barraclough | City of York | Wigan | 30 Jun 12 | |
| 226 | 49.91 | | | 49.91 | PB | Isaac Palmer | | | | Enfield & Haringey | Woodford | 17 Jul 12 | |
| 228 | 49.93 | i | | 49.93i | PB | James Ellington | | 5 | John Powell | Newham & Essex Beagles | Lee Valley | 15 Jan 12 | |
| 228 | 49.93 | | | 48.41 | | Roy Shankland | U20 | -6 | Graham Richmond | Kilmarnock | Linwood | 27 Jun 12 | |
| 228 | 49.93 | | | 49.93 | PB | Kieran McKeever | | 6 | Grant Barker | Notts | Stretford | 17 Jul 12 | |
| 231 | 49.94 | i | | 49.94i | PB | Darren Lewis | | 4 | Joe Caines | Sale Harriers Manchester | Birmingham | 12 Feb 12 | |
| 231 | 49.94 | i | | 49.12i | | Andrew Howell | | 2 | | Harrow | Lee Valley | 4 Mar 12 | |
| 231 | 49.94 | | | 49.49 | | Joseph Hutchinson | U23 | -3 | | Team Bath | Charlottesville VA, USA | 19 Apr 12 | |
| 231 | 49.94 | | | 46.46 | | David Hall | U20 | -6 | | Dartford H | Bedford | 15 Sep 12 | |
| 235 | 49.95 | | | 49.26 | | Jak Lowdon | | 4 | | Gateshead | Geneva, SUI | 2 Jun 12 | |
| 236 | 49.97 | | | 47.81 | | Brent Starkie | | 3 | Brian Craig | Blackpool, Wyre & Fylde | Stretford | 14 Aug 12 | |
| 236 | 49.97 | | | 49.27 | | Connor Henderson | U23 | -3 | Sheila Atkinson | Glasgow City | Bromley | 18 Aug 12 | |
| 238 | 49.99 | | | 47.18 | | Daniel Gray | U17 | -7 | Stephen Wymark | Kingston upon Hull | Gateshead | 6 Jul 12 | |
| 238 | 49.99 | | | 49.61 | | Oliver Robinson | | 3 | | Bingley | Stretford | 17 Jul 12 | |
| 240 | 50.00 | i | | 47.49 | | Adebowale Ademuyewo | | 7 | James Hillier | Sale Harriers Manchester | Sheffield | 4 Feb 12 | |
| 241 | 50.0 | | | 46.64 | | Alloy Wilson | | 10 | Chris Zah | Blackheath & Bromley | Hornchurch | 1 Apr 12 | |
| 50.28 | | | | | | | | | | Basingstoke | 26 May 12 | |
| 241 | 50.0 | | | 50.0 | PB | Gareth Cunningham | | 2 | Ron Roddan | Windsor Slough Eton & Hounslow | Welwyn | 6 Apr 12 | |
| 241 | 50.0 | | | 47.94 | | Timothy Kuria | | 2 | Neil Dodson | Woking | Parliament Hill | 21 Apr 12 | |
| 50.12 | | | | | | | | | | Wormwood Scrubs | 1 Sep 12 | |
| 241 | 50.0 | | | 49.56/49.5 | | Symon Woan | | 9 | Peter Dickinson | Preston | Blackpool | 12 May 12 | |
| 241 | 50.0 | | | 52.08/50.0 | PB | Adam Scott | | 1 | | Manchester H | Warrington | 26 May 12 | |
| 241 | 50.0 | | | 49.26 | | Shaka Palmer | | 4 | Paul Pinnington | Enfield & Haringey | Walton | 9 Jun 12 | |
| 51.08 | | | | | | | | | | Woodford | 7 Jul 12 | |
| 241 | 50.0 | | | 49.08 | | Josh Eades | U20 | -4 | Colin Bovell | Marlborough Athletics | Bath | 27 Jun 12 | |
| 50.15 | | | | | | | | | | Basingstoke | 30 May 12 | |
| 241 | 50.0 | | | 49.76 | | David Mould | | 3 | | Bromsgrove & Redditch | Worcester | 17 Jul 12 | |
| 50.03 | | | | | | | | | | Birmingham (Un) | 20 Jun 12 | |
| 249 | 50.02 | | | 48.33 | | Austin Joseph | U23 | -3 | Gladys Bird | Woodford Green Essex Ladies | Olympic Park | 6 May 12 | |
| 249 | 50.02 | | | 50.02 | PB | Chris Kiely | | 1 | Robert Ellchuk | Tonbridge | Yate | 12 May 12 | |
| 251 | 50.03 | i | | 47.13 | | Mark Berridge | | 6 | Martin Tarsey | Basingstoke & Mid Hants | Lee Valley | 15 Jan 12 | |
| 251 | 50.03 | | | 49.58 | | Jack Goodband | U17 | -7 | Joseph McDonnell ☘️ | Charnwood | Gateshead | 6 Jul 12 | |
| 253 | 50.04 | | | 50.04 | PB | Luke Betts | U20 | -4 | Paul Roden | Chorley AC (defunct) | Stretford | 14 Aug 12 | |
| 254 | 50.06 | i | | 50.06i | PB | Gareth Morris | U23 | -1 | | Ashford AC | Birmingham | 8 Feb 12 | |
| 51.06 | | | | | | | | | | Birmingham | 8 Jul 12 | |
| 254 | 50.06 | | | 49.23 | | Robert Allan | U20 | -5 | | Crawley | Glasgow | 30 Jun 12 | |
| 256 | 50.08 | i | | 49.42 | | Gary Coleman | U23 | -2 | Colin Bovell | Yate | Sheffield | 25 Feb 12 | |
| 256 | 50.08 | | | 49.99 | | Edward Dunford | | 6 | | Birchfield H | Bedford | 26 May 12 | |
| 258 | 50.10 | | | 47.40 | | Brian Darby | V35 | 18 | Charles Kelly | Coventry | Derby | 21 Jul 12 | |
| 259 | 50.1 | | | 47.05 | | Nicholas Atwell | | 4 | Ivor Patrick Northey | Herne Hill | Hornchurch | 1 Apr 12 | |
| 50.61 | i | | | | | | | | | Lee Valley | 28 Jan 12 | |
| 259 | 50.1 | | | 49.15 | | Oliver Lithgow | U20 | -5 | Donald Moss | Wigan & District | Carlisle | 26 May 12 | |
| 50.15 | i | | | | | | | | | Sportcity | 16 Dec 12 | |
| 261 | 50.13 | | | 47.40 | | Karl Goodman | U20 | -4 | Nick Taylor | Vale of Aylesbury | Crystal Palace | 7 Jul 12 | |
| 261 | 50.13 | | | 50.13/50.1 | PB | Tom Marley | | 3 | Darrell Maynard | Cardiff | Hendon | 28 Jul 12 | |
| 263 | 50.14 | | | 47.82 | | Adam Daish | | 3 | | Herts Phoenix | Milton Keynes | 19 May 12 | |
| 263 | 50.14 | | | 47.10 | | Kyle Langford | U17 | -7 | George Harrison | Shaftesbury Barnet | Lee Valley | 24 Jun 12 | |
| 263 | 50.14 | | | 49.74 | | Leslie Odamtten-Addy | | 3 | | Shaftesbury Barnet | Derby | 8 Sep 12 | |
| 266 | 50.15 | | | 49.15 | | Theo Blundell | U17 | -6 | Eddie Cockayne | Birchfield H | Gateshead | 6 Jul 12 | |
| 267 | 50.16 | | | 49.99/49.6 | | Samuel Randall | U17 | -7 | Mark Shepherd | Team Kennet | Bedford | 18 Aug 12 | |
| 268 | 50.17 | | | 49.19 | | Lee Mahon | | 5 | | Thames Valley | Kingston | 21 Apr 12 | |
| 269 | 50.18 | i | | 50.05/49.2 | | Ashley Hill | U23 | -2 | John Baron | Cheltenham | Sheffield | 25 Feb 12 | |
| 50.4 | | | | | | | | | | Cleckheaton | 1 Apr 12 | |
| 269 | 50.18 | | | 49.68 | | Steven Carter | U23 | -3 | Andy Forman | Southampton | Brighton | 21 Jul 12 | |
| 271 | 50.19 | | | 48.98 | | Lawrence Doherty | U23 | -3 | | UC Davis | Davis CA, USA | 21 Apr 12 | |
| 272 | 50.20 | | | 47.94 | | Jacob Ness | U17 | -8 | Lee Ness | City of Salisbury | Gateshead | 6 Jul 12 | |
| 272 | 50.20 | | | 50.20 | PB | Andrew Williams | U20 | -6 | Raymond Twentyman | Liverpool Pembroke Sefton | Stretford | 17 Jul 12 | |
| 274 | 50.2 | | | 49.19 | | Ashley Langton | U20 | -5 | John Blackshaw | Doncaster | Doncaster | 5 May 12 | |
| 50.28 | | | | | | | | | | Hull | 14 Jul 12 | |
| 274 | 50.2 | | | 50.42/49.9 | | Mitch White | U20 | -4 | | Bracknell AC | Eton | 13 May 12 | |
| 50.79 | | | | | | | | | | Watford | 13 Jun 12 | |
| 274 | 50.2 | | | 51.04/50.2 | PB | Ahmodu Audu | | 3 | | Radley | Abingdon | 19 May 12 | |
| 51.04 | | | | | | | | | | Horspath | 21 Apr 12 | |
| 274 | 50.2 | | | 50.35/50.2 | PB | Finbarr Ricketts | U23 | -2 | | Highgate | Battersea Park | 19 May 12 | |
| 50.35 | | | | | | | | | | Tooting Bec | 4 Jun 12 | |
| 274 | 50.2 | | | 50.57/50.2 | PB | Adam Ricketts | | 2 | James Coney | Andover | Harrow | 19 May 12 | |
| 50.57 | | | | | | | | | | Birmingham | 8 Jul 12 | |
| 274 | 50.2 | | | 50.29/50.2 | PB | Ben Argent | U20 | -6 | | Colchester H | Colchester | 5 Jul 12 | |
| 50.29 | | | | | | | | | | Chelmsford | 12 May 12 | |
| 274 | 50.2 | | | 48.52 | | Aaron McCammon | | 3 | Stephen Ball | Kent | Catford | 12 Jul 12 | |
| 274 | 50.2 | | | 49.97/49.9 | | Benjamin Brand | | 1 | | Manx | Douglas | 14 Jul 12 | |
| 274 | 50.2 | | | 49.39 | | Rick Ward | | 1 | Tim Ash | City of Norwich | Norwich | 1 Sep 12 | |
| 283 | 50.21 | i | | 50.21i | PB | Andrew McFarlane | U20 | -4 | Colin Sinclair | Victoria Park City of Glasgow | Glasgow | 3 Mar 12 | |
| 283 | 50.21 | | | 49.33/49.2 | | Jamie Robinson | U20 | -5 | Nick Radburn | Birchfield H | Birmingham (Un) | 20 Jun 12 | |
| 285 | 50.22 | | | 50.22 | PB | Melvyn Anukam | U23 | -1 | | Belgrave | Kingston | 13 May 12 | |
| 286 | 50.24 | i | | 48.93i | | Aiden Davies | U17 | -6 | Bruce Bewley | Doncaster | Birmingham | 25 Feb 12 | |
| 50.56 | | | | | | | | | | Bedford | 26 May 12 | |
| 51.3 | | | | | | | | | | Jarrow | 30 Jun 12 | |
| 286 | 50.24 | | | 49.59 | | Ben Gregory | U23 | -1 | Emily Parker | Vale of Aylesbury | Loughborough | 16 May 12 | |
| 286 | 50.24 | | | 49.76 | | Jahmal Germain | U23 | -3 | | Newham & Essex Beagles | Bedford | 26 May 12 | |
| 289 | 50.25 | | | 49.84i | | Richard Davies | | 1 | | Blackheath & Bromley | Derby | 28 Jul 12 | |
| 290 | 50.26 | | | 49.56 | | David Feeney | | 3 | Emily Parker | Amber Valley & Erewash | Loughborough | 16 May 12 | |
| 290 | 50.26 | | | 50.26 | PB | Peter Richardson | | 1 | | Northern (Isle of Man) | St. Peter Port | 9 Jun 12 | |
| 292 | 50.27 | | | 50.27 | PB | Matthew Antoniazzi | U20 | -5 | James Thie | Cwmbran | Cardiff | 12 May 12 | |
| 293 | 50.28 | | | 48.75 | | Victor Nutakor | | 3 | Clarence Callender | Newham & Essex Beagles | Hendon | 16 Jun 12 | |
| 294 | 50.29 | | | 48.72 | | Adam Thomson | U20 | -4 | Raymond Twentyman | Liverpool Pembroke Sefton | Stretford | 5 Jun 12 | |
| 294 | 50.29 | | | 50.11/50.1 | | Craig Morten | U20 | -5 | David Hull | Blackheath & Bromley | Derby | 9 Sep 12 | |
| 296 | 50.30 | | | 50.30 | PB | Robbie Farnham-Rose | U20 | -5 | Mark Hookway | Tonbridge | Eltham | 14 Jul 12 | |
| 296 | 50.30 | | | 50.30 | PB | Denver Morrison-Massey | U17 | -8 | | Sale Harriers Manchester | Sportcity | 2 Sep 12 | |
| 298 | 50.3 | | | 50.00 | | James Wildish | U23 | -2 | | Kent | Dartford | 5 May 12 | |
| 298 | 50.3 | | | 49.69/49.6 | | Andrew Dean-Young | | 3 | Cy Knibb | Bristol & West | Stoke Gifford | 30 Jun 12 | |
| 50.76 | | | | | | | | | | Eton | 18 Aug 12 | |
| 298 | 50.3 | | | 48.55 | | Martin Cook | | 4 | Mike Corden | Mansfield | Stoke Gifford | 30 Jun 12 | |
| 50.36 | | | | | | | | | | Birmingham | 2 Jun 12 | |
| 298 | 50.3 | | | 51.20/50.3 | PB | Chris Goodwin | U20 | -5 | | West Cheshire | Ellesmere Port | 1 Jul 12 | |
| 51.20 | | | | | | | | | | Stretford | 17 Jul 12 | |
| 298 | 50.3 | | | 50.12 | | Daniel Holiday | | 2 | Andy Lyons | Kingston upon Hull | Scunthorpe | 21 Jul 12 | |
| 50.31 | | | | | | | | | | Stretford | 31 Jul 12 | |
| 298 | 50.3 | | | 50.58/50.3 | PB | Jamie Horder | | 1 | | Cheltenham | Nottingham | 4 Aug 12 | |
| 50.58 | | | | | | | | | | Birmingham (Un) | 20 Jun 12 | |
| 298 | 50.3 | | | 49.14 | | Ted Romney | | 1 | Brian Craig | Blackpool, Wyre & Fylde | Ellesmere Port | 5 Aug 12 | |
| 50.78 | | | | | | | | | | Stretford | 1 May 12 | |
| 298 | 50.3 | | | 48.76 | | Kim Sobotie | U17 | -8 | Paul Keeble | Stevenage & North Herts | Stevenage | 12 Aug 12 | |
| 298 | 50.3 | | | 50.14 | | Simeon Clarence | U17 | -6 | Robert Hingley | Bromsgrove & Redditch | Worcester | 2 Sep 12 | |
| 51.07 | | | | | | | | | | Gateshead | 6 Jul 12 | |
| 307 | 50.31 | | | 49.31/48.9 | | Andrew Faulkner | | 4 | | Yeovil | Yeovil | 22 Apr 12 | |
| 308 | 50.32 | i | | 49.23 | | Scott Edwards | U20 | -5 | Daniel Caines | Cardiff | Birmingham | 5 Feb 12 | |
| 50.33 | | | | | | | | | | Loughborough | 15 Apr 12 | |
| 50.7 | | | | | | | | | | Nottingham | 1 Apr 12 | |
| 308 | 50.32 | | | 49.98 | | Joe Gaynor | U23 | -3 | Martin Owens | Herts Phoenix | Birmingham | 2 Jun 12 | |
| 308 | 50.32 | | | 48.38 | | Scott Barker | U17 | -8 | David Vosser | Winchester | Bedford | 18 Aug 12 | |
| 311 | 50.33 | | | 48.88 | | Ainsley Campbell | U23 | -3 | | Enfield & Haringey | Lee Valley | 27 May 12 | |
| 312 | 50.35 | | | 49.49 | | Matthew Schweiger | | 3 | | Unattached | Bern, SUI | 6 Jul 12 | |
| 312 | 50.35 | | | 49.96 | | David Horniman | U23 | -2 | Blake Ellis | Trafford | Stretford | 31 Jul 12 | |
| 314 | 50.36 | | | 49.47 | | Greg Urwin | U23 | -3 | Doug Maxwell | Gateshead | Shildon | 22 Apr 12 | |
| 315 | 50.37 | | | 50.06 | | Alec Wing | U23 | -1 | Chris Zah | Victoria Park & Tower Hamlets | Newham | 27 Jun 12 | |
| 316 | 50.38 | | | 48.67 | | Adam McBraida | U23 | -3 | Nicholas Brown | Oxford Uni | Kingston | 21 Apr 12 | |
| 316 | 50.38 | | | 49.53 | | Ewan Dyer | U20 | -5 | Eric Simpson | Pitreavie | Wakefield | 22 Jul 12 | |
| 316 | 50.38 | | | 49.82 | | Hugo Fleming | U20 | -6 | Jack Rutherford | Walton | Woking | 1 Aug 12 | |
| 319 | 50.39 | | | 50.36 | | Stephen Bennett | U23 | -1 | Vince Wilson | Preston | Loughborough | 13 Jun 12 | |
| 319 | 50.39 | | | 50.39 | PB | Mahmood Khaisto | U15 | -9 | | S Factor | Gateshead | 7 Jul 12 | |
| 321 | 50.40 | | | 50.40 | PB | Mali Lewis | U20 | -4 | | Shaftesbury Barnet | Mile End | 12 May 12 | |
| 321 | 50.40 | | | 49.05 | | Kieran Flannery | | 3 | Alasdair Donaldson | Gateshead | Lee Valley | 27 May 12 | |
| 323 | 50.4 | | | 47.89 | | Shawn Wright | U20 | -5 | Gordon Robertson | Livingston | Edinburgh | 12 May 12 | |
| 50.44 | | | | | | | | | | Grangemouth | 8 Jun 12 | |
| 323 | 50.4 | | | 49.57 | | James Lynch | | 2 | | Birchfield H | Wolverhampton | 27 May 12 | |
| 323 | 50.4 | | | 51.39i/50.4 | PB | Oliver Palmer | U23 | -3 | Steven Garrett | City of York | York | 23 Jun 12 | |
| 51.46 | | | | | | | | | | Don Valley | 22 Apr 12 | |
| 323 | 50.4 | | | 49.62 | | Ciaran Dunnion | U20 | -5 | Everton Caines | Solihull & Small Heath | Brierley Hill | 24 Jun 12 | |
| 50.73 | | | | | | | | | | Birmingham (Un) | 20 Jun 12 | |
| 323 | 50.4 | | | 49.91i | | Peter Wilson | | 7 | Phil Snoddy | Wirral | Ellesmere Port | 1 Jul 12 | |
| 50.48 | | | | | | | | | | Stretford | 14 Aug 12 | |
| 323 | 50.4 | | | 50.11 | | Jason Conchie | U23 | -3 | | Hyndburn | Bury | 5 Aug 12 | |
| 323 | 50.4 | | | 49.29 | | Adam Hassan | U23 | -3 | Mark Hatton | Reading AC | Reading | 9 Sep 12 | |
| 50.68 | | | | | | | | | | Eton | 18 Aug 12 | |
| 330 | 50.41 | | | 50.41/50.1 | PB | Scott Riley | | 10 | | Trafford | Stretford | 31 Jul 12 | |
| 331 | 50.42 | | | 49.49/49.3 | | Darryn Campbell | | 8 | Janet Smith | Bournemouth | Portsmouth | 13 May 12 | |
| 332 | 50.43 | | | 49.76/49.3 | | Adam Omisore | | 5 | Todd Bennett | Southampton | Woking | 1 Aug 12 | |
| 333 | 50.44 | | | 49.91 | | Stanley Livingston | U17 | -7 | Andrew Winnie | Jersey | Southampton | 30 Jun 12 | |
| 333 | 50.44 | | | 50.44 | PB | Rob Hall | U17 | -6 | Trevor Raggett | Windsor Slough Eton & Hounslow | Woking | 1 Aug 12 | |
| 335 | 50.46 | | | 50.20 | | Matthew Collins | U17 | -6 | | Barry & Vale | Olympic Park | 9 May 12 | |
| 336 | 50.49 | | | 50.00 | | Joseph Lancaster | U17 | -7 | | City of Sheffield | Stretford | 5 Jun 12 | |
| 337 | 50.50 | i | | 49.76 | | Charlie Perry | U20 | -5 | | Cambridge H | Lee Valley | 26 Feb 12 | |
| 50.96 | | | | | | | | | | Ashford | 13 May 12 | |
| 52.5 | | | | | | | | | | Eltham | 29 Apr 12 | |
| 337 | 50.50 | | | 50.30/49.8 | | Carl McEwan | | 8 | Ivor Adams | Newport H | Swansea | 10 Jun 12 | |
| 337 | 50.50 | | | 48.65 | | Gavin Lock | U20 | -6 | | Enfield & Haringey | Hendon | 25 Aug 12 | |
| 340 | 50.5 | | | 48.34 | | Jake Wightman | U20 | -5 | Geoff Wightman | Edinburgh AC | Edinburgh | 12 May 12 | |
| 50.70 | | | | | | | | | | Grangemouth | 5 Sep 12 | |
| 340 | 50.5 | | | 48.49 | | Tom Guy | U20 | -4 | | City of Stoke | Stoke | 12 May 12 | |
| 50.98 | | | | | | | | | | Gateshead | 30 May 12 | |
| 340 | 50.5 | | | 51.42/50.3 | | Tim Burt | | 1 | Craig Winrow | Ashford AC | Southampton | 19 May 12 | |
| 340 | 50.5 | | | 50.20 | | David Stewart | U23 | -3 | | Dartford H | Erith (Match 1) | 9 Jun 12 | |
| 50.53 | | | | | | | | | | Eltham | 20 Jun 12 | |
| 340 | 50.5 | | | 48.60 | | Peter De'Ath | U20 | -6 | | Stevenage & North Herts | Welwyn | 9 Jun 12 | |
| 50.97 | | | | | | | | | | Watford | 12 May 12 | |
| 340 | 50.5 | | | 48.23/48.2 | | Sam Ellis | | 8 | | City of Sheffield | Scunthorpe | 5 Aug 12 | |
| 340 | 50.5 | | | 49.66 | | Liam Hebblethwaite | U17 | -7 | David Pritchard | City of Stoke | Stoke | 12 Aug 12 | |
| 340 | 50.5 | | | 50.5 | PB | Kieran Smith | U20 | -4 | Simon Gale | Royal Sutton Coldfield | Leeds | 3 Oct 12 | |
| 348 | 50.52 | | | 46.39 | | Elliot Rutter | U20 | -6 | Daniel Cossins | Somerset Schs | Exeter | 23 Jun 12 | |
| 349 | 50.53 | | | 49.96 | | Rhys Granville | U17 | -7 | Delyth Brown | Carmarthen | Cardiff | 25 Aug 12 | |
| 350 | 50.54 | | | 49.84 | | Tom Reynolds | | 6 | | Windsor Slough Eton & Hounslow | Arona, ESP | 26 May 12 | |
| 351 | 50.56 | | | 49.82i | | Edward Dawes | U23 | -2 | Martyn Jones | Telford AC | Don Valley | 22 Apr 12 | |
| 352 | 50.57 | | | 50.57 | PB | Michael Haslett | U23 | -1 | | Manx | Watford | 16 May 12 | |
| 353 | 50.58 | | | 48.37 | | Donald MacLeod | | 3 | Brian Whittle | Stornoway | Grangemouth | 14 Apr 12 | |
| 353 | 50.58 | | | 49.89 | | Alex Fields | | 3 | Cy Knibb | Bristol & West | Yate | 22 Apr 12 | |
| 355 | 50.59 | | | 48.76 | | Lee McLaughlin | U23 | -1 | Jason Carty | Croydon | Crawley | 8 Apr 12 | |
| 355 | 50.59 | | | 50.59 | PB | Patrick Taylor | U17 | -7 | Harry Czapski | Vale of Aylesbury | Watford | 16 May 12 | |
| 355 | 50.59 | | | 49.16 | | Tom Grantham | | 7 | Mike Corden | City of Sheffield | Málaga (C), ESP | 26 May 12 | |
| 355 | 50.59 | | | 49.38 | | Elliot O'Neill | | 5 | Pauline Lynch | Macclesfield | Stretford | 19 Jun 12 | |
| 359 | 50.60 | A | | 50.59 | | James Senior | U23 | -3 | Tim Ash | City of Norwich | El Paso TX, USA | 24 Mar 12 | |
| 359 | 50.60 | | | 48.64/48.6 | | Andrew Smitherman | U23 | -1 | Tony Noel | Cheltenham | Olympic Park | 5 May 12 | |
| 361 | 50.6 | | | 50.78/50.6 | PB | Alex Best | U20 | -6 | Robert Grew | Horsham Blue Star | Crawley | 13 May 12 | |
| 50.78 | | | | | | | | | | Crystal Palace | 7 Jul 12 | |
| 361 | 50.6 | | | 50.38 | | Paul Miller | | 1 | Bruce Horsburgh | Gateshead | York | 26 May 12 | |
| 50.95 | | | | | | | | | | Olympic Park | 5 May 12 | |
| 361 | 50.6 | | | 50.99/50.6 | PB | Peter Barnshaw | U20 | -4 | Robert Done | Radley | Oxford | 6 Jun 12 | |
| 51.41 | | | | | | | | | | Horspath | 12 May 12 | |
| 361 | 50.6 | | | 49.45 | | Michael Ferguson | U20 | -6 | Ken Hogg | Banchory Stonehaven | Aberdeen | 12 Jul 12 | |
| 50.88 | | | | | | | | | | Inverness | 16 Sep 12 | |
| 361 | 50.6 | | | 48.46/48.4 | | Nick Choudhury | | 1 | Jennifer O'Shea | Luton | Luton | 14 Jul 12 | |
| 51.97 | | | | | | | | | | Hendon | 21 Jul 12 | |
| 361 | 50.6 | | | 50.6 | PB | Patrick Tarry | U23 | -2 | Christopher Frapwell | Stroud | Nottingham | 4 Aug 12 | |
| 361 | 50.6 | | | 49.58/49.5 | | Daniel Stepney | | 2 | Jon Bigg | Brighton Phoenix | Horsham | 19 Aug 12 | |
| 50.90 | | | | | | | | | | Watford | 16 May 12 | |
| 368 | 50.61 | | | 49.75 | | Christian Roberts | U23 | -1 | Derek Redmond | Huntingdonshire | Olympic Park | 5 May 12 | |
| 368 | 50.61 | | | 47.67 | | Matthew Pagan | U15 | -9 | Daniel Gilroy | West Cheshire | Gateshead | 7 Jul 12 | |
| 370 | 50.62 | | | 50.62 | PB | Andrew Richardson | U23 | -1 | John Stephenson | Tynedale | Loughborough | 16 May 12 | |
| 371 | 50.63 | | | 50.14 | | Haydn Thomason | U20 | -4 | Eddie McKenna | Shetland | Inverness | 12 May 12 | |
| 371 | 50.63 | | | 50.63 | PB | Jack Walker | U20 | -4 | Gordon Lockie | Giffnock North | Linwood | 27 Jun 12 | |
| 373 | 50.64 | | | 49.14 | | James Buck | U23 | -3 | Karen Buck | City of York | Olympic Park | 5 May 12 | |
| 373 | 50.64 | | | 49.61/49.5 | | Carl Palin | U20 | -5 | Tim Higman | St. Albans AC | Watford | 12 May 12 | |
| 375 | 50.65 | | | 48.90 | | Darren Corbin | U23 | -2 | Frank Adams | Enfield & Haringey | Olympic Park | 5 May 12 | |
| 376 | 50.66 | | | 47.87 | | Sean Watson | | 1 | Rodger Harkins | Shettleston | Basingstoke | 26 May 12 | |
| 377 | 50.67 | | | 50.31 | | Nicholas Belo | U23 | -2 | | Cambridge H | Eltham | 23 May 12 | |
| 378 | 50.68 | i | | 50.68i | PB | Zak Saucede | | 1 | | Enfield & Haringey | Birmingham | 4 Feb 12 | |
| 51.8 | | | | | | | | | | Luton | 14 Jul 12 | |
| 378 | 50.68 | | | 50.68 | PB | Matthew George | | 2 | Greg Richards | Windsor Slough Eton & Hounslow | Bedford | 26 May 12 | |
| 380 | 50.69 | | | 50.12/49.3 | | Chris Monk | | 3 | Richard Massey | Mansfield | Bournemouth | 28 Jul 12 | |
| 380 | 50.69 | | | 49.76 | | Adam Taylor | U20 | -4 | Colin Bovell | Sutton & District | Tooting Bec | 18 Aug 12 | |
| 382 | 50.70 | i | | 50.50i | | Joe Houston | U20 | -5 | | Leamington | Birmingham | 19 Feb 12 | |
| 50.8 | | | | | | | | | | Leicester | 12 May 12 | |
| 382 | 50.70 | | | 46.58 | | Andre Fernandez | | 10 | Guy Spencer | Newham & Essex Beagles | Olympic Park | 5 May 12 | |
| 382 | 50.70 | | | 49.78 | | Jarrod Skervin | U20 | -5 | Grant Barker | Notts | Swansea | 22 Jul 12 | |
| 382 | 50.70 | | | 49.50i | | Sean Thompson | U23 | -3 | | Victoria Park City of Glasgow | Grangemouth | 5 Aug 12 | |
| 386 | 50.7 | | | 49.75 | | Harry Ashman | U20 | -4 | | Highgate | Hemel Hempstead | 21 Apr 12 | |
| 51.43 | i | | | | | | | | | Birmingham | 25 Feb 12 | |
| 52.00 | | | | | | | | | | Lee Valley | 14 Apr 12 | |
| 386 | 50.7 | | | 49.43 | | Sam Yates | U20 | -4 | Don Lennon | Newham & Essex Beagles | Blackpool | 12 May 12 | |
| 51.21 | | | | | | | | | | Cosford | 21 Apr 12 | |
| 386 | 50.7 | | | 56.26/49.4 | | Arran Smith | U23 | -2 | | Notts | Nottingham | 13 May 12 | |
| 386 | 50.7 | | | 50.29 | | Calum Bressington | U23 | -3 | | Southampton | Southampton | 19 May 12 | |
| 50.97 | | | | | | | | | | Portsmouth | 13 May 12 | |
| 386 | 50.7 | | | 51.32/50.7 | PB | Ashley Marshall | U20 | -4 | Allen Parkinson | Bolton | Stretford | 1 Jul 12 | |
| 51.32 | | | | | | | | | | Derby | 8 Sep 12 | |
| 386 | 50.7 | | | 50.65 | | Osman Muskwe | | 5 | | Radley | Colchester | 5 Jul 12 | |
| 50.95 | | | | | | | | | | Bedford | 26 May 12 | |
| 392 | 50.72 | | | 49.20 | | Pajo Hamilton | | 6 | Malcolm McCausland | City of Derry | Antrim | 10 Jun 12 | |
| 393 | 50.74 | | | 50.70 | | Alexander Wort | U20 | -4 | Christopher Bartram | Warrington AC | Bedford | 26 May 12 | |
| 393 | 50.74 | | | 49.68 | | Adam Jamson | U17 | -7 | Joe Galvin | Leigh | Wigan | 30 Jun 12 | |
| 395 | 50.75 | | | 50.75 | PB | Paul Adair | U23 | -1 | | Havering | Chelmsford | 13 May 12 | |
| 395 | 50.75 | | | 50.75 | PB | Victor Muthakor | | | | Newham & Essex Beagles | Woodford | 23 Jun 12 | |
| 397 | 50.77 | i | | 50.77i | PB | Jermaine Hamilton | U17 | -6 | Darren Braithwaite | Orion | Lee Valley | 11 Feb 12 | |
| 398 | 50.79 | i | | 49.59 | | Hayden Carter | U23 | -2 | Barry Kitcher | Cannock & Stafford | Birmingham | 4 Feb 12 | |
| 51.07 | | | | | | | | | | Watford | 16 May 12 | |
| 398 | 50.79 | | | 50.79 | PB | Scott Douglas | U20 | -4 | Joseph McDonnell ☘️ | Charnwood | Loughborough | 6 Jun 12 | |
| 400 | 50.80 | | | 50.80 | PB | Rob Phillips | U17 | -7 | Sandra Woodman | Yate | Yate | 12 May 12 | |
| 400 | 50.80 | | | 49.89 | | Steven Tester | | 8 | Iain Presnell | Tonbridge | Eltham | 23 May 12 | |
| 402 | 50.8 | | | 50.38/50.0 | | Andrew de-Camps | | 3 | Paul de-Camps | Gloucester | Cheltenham | 5 May 12 | |
| 402 | 50.8 | | | 51.29/50.5 | | Rhian Hastey | | 4 | | Rotherham | Grimsby | 26 May 12 | |
| 402 | 50.8 | | | 50.8 | PB | Adam Taylor | | 1 | | Shrewsbury | Corby | 27 May 12 | |
| 402 | 50.8 | | | 50.8 | PB | Yanis Wilkinson-Teece | U17 | -7 | Michael Oluban | Birchfield H | Birmingham (Un) | 30 May 12 | |
| 402 | 50.8 | | | 50.8 | PB | Ryan Fairclough | | 1 | Andrew Fox | Northern (Isle of Man) | Douglas | 14 Jul 12 | |
| 402 | 50.8 | | | 51.28/50.2 | | Matthew Houlden | U23 | -3 | Denise Timmis | Lincoln Wellington | Scunthorpe | 5 Aug 12 | |
| 408 | 50.81 | | | 49.21 | | Ben Hazell | | 6 | Greg Richards | Basingstoke & Mid Hants | Serrahima, ESP | 5 May 12 | |
| 409 | 50.82 | | | 49.15 | | Edward Hall | U20 | -6 | Iain Presnell | Tonbridge | Tonbridge | 9 Jun 12 | |
| 409 | 50.82 | | | 50.82 | PB | Hamed (Mo) Agboke | | 7 | | Hercules Wimbledon | Tooting Bec | 18 Aug 12 | |
| 411 | 50.83 | i | | 49.63 | | Daniel Petty | U17 | -6 | Robert Grew | Exeter | Birmingham | 11 Feb 12 | |
| 50.93 | | | | | | | | | | Exeter | 12 May 12 | |
| 411 | 50.83 | | | 50.83 | PB | Seumas Thomson | U20 | -6 | Keith Ridley | Edinburgh AC | Grangemouth | 8 Jun 12 | |
| 413 | 50.84 | | | 47.43 | | Gwilym Cooper | U23 | -2 | Marina Armstrong | Brighton & Hove | Brighton | 21 Jul 12 | |
| 414 | 50.85 | | | 50.85 | PB | Mark Cryer | U20 | -4 | Ian Grant | Medway & Maidstone | Bedford | 26 May 12 | |
| 415 | 50.89 | | | 50.63 | | Daniel Trueman | U17 | -6 | Sally Brown | Stroud | Yate | 22 Apr 12 | |
| 415 | 50.89 | | | 50.89 | PB | Martin Ogun-Sanya | | 4 | | Loughborough Students | Loughborough | 30 May 12 | |
| 415 | 50.89 | | | 50.72/50.5 | | David Smale | U23 | -2 | Ron Dawson | Southend | Bromley | 18 Aug 12 | |
| 418 | 50.9 | | | 49.69/49.2 | | Jack Imray | U23 | -2 | | Tipton | Nottingham | 1 Apr 12 | |
| 51.90 | i | | | | | | | | | Birmingham | 12 Feb 12 | |
| 418 | 50.9 | | | 49.05 | | Reece Dimech | U20 | -5 | Martin Brockman | Medway & Maidstone | Eltham | 29 Apr 12 | |
| 51.38 | | | | | | | | | | Ashford | 13 May 12 | |
| 418 | 50.9 | | | 50.55 | | Paul Green | U23 | -3 | | Poole Runners | Bournemouth | 12 May 12 | |
| 418 | 50.9 | | | 49.19i | | Philip Octave | | 12 | | Hillingdon | Battersea Park | 19 May 12 | |
| 51.39 | i | | | | | | | | | Lee Valley | 4 Mar 12 | |
| 51.44 | | | | | | | | | | Mile End | 12 May 12 | |
| 418 | 50.9 | | | 49.51/49.1 | | Joe Astley | U23 | -1 | | Poole Runners | Poole | 19 May 12 | |
| 418 | 50.9 | | | 48.51 | | Ross Edgley | | 11 | | Wolverhampton & Bilston | Wolverhampton | 27 May 12 | |
| 51.97 | | | | | | | | | | Birmingham | 2 Jun 12 | |
| 418 | 50.9 | | | 51.45i/50.9 | PB | Lui Pollastrone | U20 | -4 | | Team Bath | Cheltenham | 4 Jun 12 | |
| 51.45 | i | | | | | | | | | Cardiff | 19 Feb 12 | |
| 418 | 50.9 | | | 50.81i/50.8 | | Anthony Parkes | U20 | -5 | Paul Tasker | Tamworth | Telford | 1 Jul 12 | |
| 418 | 50.9 | | | 50.9 | PB | Jerome Gregory | | | | Colchester & Tendring | Colchester | 5 Jul 12 | |
| 418 | 50.9 | | | 49.86/49.4 | | Steve Gregory | | 2 | | Lincoln Wellington | Scunthorpe | 5 Aug 12 | |
| 418 | 50.9 | | | 49.91 | | Aaron Carter | U20 | -6 | | Lewes | Osterley | 1 Sep 12 | |
| 51.73 | | | | | | | | | | Crawley | 27 Aug 12 | |
| 429 | 50.91 | | | 50.91 | PB | Dudley Mason | U20 | -5 | | Southampton | Portsmouth | 13 May 12 | |
| 430 | 50.92 | | | 49.09 | | Lea Stephenson | | 4 | Doug Maxwell | Tynedale | Shildon | 22 Apr 12 | |
| 431 | 50.94 | | | 50.94 | PB | Tom Hole | U20 | -4 | | Yeovil | Derby | 28 Jul 12 | |
| 431 | 50.94 | | | 49.22 | | Calum McWilliam | U17 | -6 | Gordon Bury | Giffnock North | Sportcity | 1 Sep 12 | |
| 433 | 50.95 | | | 50.95 | PB | Daniel Ochola | U23 | -3 | Ron Roddan | Thames Valley | Hendon | 28 Jul 12 | |
| 434 | 50.96 | | | 49.49 | | Dan Lavipour | | 5 | | Highgate | Waitakere, NZL | 24 Mar 12 | |
| 434 | 50.96 | | | 50.96 | PB | Tom O'Dowd | U20 | -4 | Peter Barry | Harrow | Gateshead | 30 Jun 12 | |
| 436 | 50.97 | | | 50.72/49.8 | | Alistair Robinson | | 5 | Christopher Bedford | Wakefield | Hull | 15 Apr 12 | |
| 436 | 50.97 | | | 49.18/49.1 | | James Gillingham | U17 | -6 | Vespa Ellis | Basildon | Chelmsford | 12 May 12 | |
| 436 | 50.97 | | | 50.29/49.8 | | Paul Owen | | 6 | Brian MacKenzie | Chelmsford | Chelmsford | 13 May 12 | |
| 436 | 50.97 | | | 50.97 | PB | Mark Robinson | U23 | -1 | | Ipswich | Eton | 18 Aug 12 | |
| 440 | 50.98 | i | | 50.74 | | Matthew Mayne | U20 | -6 | | Cannock & Stafford | Birmingham | 25 Feb 12 | |
| 51.8 | | | | | | | | | | Stoke | 5 May 12 | |
| 52.14 | | | | | | | | | | Swansea | 22 Jul 12 | |
| 440 | 50.98 | | | 50.44 | | Luke Sargeant | | 2 | | Crawley | Kingston | 21 Apr 12 | |
| 440 | 50.98 | | | 50.12/49.7 | | Jamie McCullagh | | 10 | | Kingston & Poly | Basingstoke | 26 May 12 | |
| 443 | 50.99 | | | 50.02 | | Chris McNaught | U20 | -5 | Barry Edwards | Menai | Brecon | 7 Jul 12 | |
| 443 | 50.99 | | | 50.99 | PB | Dominic Scott | U23 | -2 | Blake Ellis | Altrincham | Stretford | 31 Jul 12 | |
| 445 | 51.00 | | | 51.00 | PB | Carl Hill | U23 | -1 | Sean Price | Aberdare Valley | Cardiff | 12 May 12 | |
| 446 | 51.0 | | | 51.44/51.0 | PB | Daniel Harmes | U23 | -2 | David Harmes | Scunthorpe & District AC (Defunct) | Hull | 12 May 12 | |
| 51.44 | | | | | | | | | | Hull | 22 Apr 12 | |
| 446 | 51.0 | | | 51.50/48.9 | | Andrew Worden | U20 | -6 | Peter Meredith | Cornwall AC | Basingstoke | 9 Jun 12 | |
| 446 | 51.0 | | | 51.47/51.0 | PB | Daniel Brownbill | U23 | -3 | | Leeds City | Stretford | 1 Jul 12 | |
| 51.89 | | | | | | | | | | Stretford | 3 Jul 12 | |
| 446 | 51.0 | | | 51.19/50.2 | | Hassan Davis | | 1 | Junior Field | Kent | Catford | 12 Jul 12 | |
| 51.27 | | | | | | | | | | Eltham | 23 May 12 | |
| 446 | 51.0 | | | 49.74 | | Tom Earley | U20 | -5 | Philip Oliver | Colwyn Bay | Connah's Quay | 21 Jul 12 | |
| 51.34 | | | | | | | | | | Cardiff | 14 Jul 12 | |
| 451 | 51.01 | | | 49.18 | | Craig Cox | | 4 | Stephen King | Crawley | Bromley | 18 Aug 12 | |
| 452 | 51.02 | | | 50.84 | | David New | U23 | -2 | Keith Ridley | Edinburgh AC | Grangemouth | 15 Jul 12 | |
| 453 | 51.03 | | | 49.70 | | Brendon McConville | | 11 | | Liverpool H | Dublin (S), IRL | 20 May 12 | |
| 453 | 51.03 | | | 50.54 | | Kane Lee | U20 | -6 | Neil Miller | Yate | Yate | 24 Jun 12 | |
| 453 | 51.03 | | | 47.54 | | Neil Burnside | | 6 | John Lees | Shaftesbury Barnet | Liverpool | 18 Aug 12 | |
| 456 | 51.04 | i | | 51.04i | PB | Henry Tufnell | U23 | -3 | Tim Springfield | Radley | Boston MA, USA | 11 Feb 12 | |
| 456 | 51.04 | | | 49.17i | | Alastair Prenn | U20 | -5 | | Belgrave | Battersea Park | 4 Jul 12 | |
| 458 | 51.05 | | | 50.32 | | Antoni Davis-Phillip | U23 | -1 | | Kent | Loughborough | 30 May 12 | |
| 459 | 51.06 | | | 50.33 | | Declan Murray | U23 | -1 | | Macclesfield | Olympic Park | 5 May 12 | |
| 459 | 51.06 | | | 51.06 | PB | Alex Cooke | U23 | -1 | Stephen Ball | Trafford | Stretford | 31 Jul 12 | |
| 461 | 51.07 | | | 50.77i | | Jonathan Hobbs | U20 | -5 | Helen Patricia James | Cardiff | Swansea | 22 Jul 12 | |
| 461 | 51.07 | | | 49.70 | | David Banwell-Clode | U23 | -3 | James Thie | Cwmbran | Cardiff | 25 Aug 12 | |
| 461 | 51.07 | | | 50.01 | | Neil Holloway | U20 | -5 | Peter Barry | Harrow | Milton Keynes | 1 Sep 12 | |
| 464 | 51.08 | | | 51.08 | PB | John Coyle | U23 | -3 | Sara MacDonald-Gray | Olympian Youth | Bangor | 26 May 12 | |
| 464 | 51.08 | | | 49.88/49.7 | | Jonathan Ketley | U20 | -5 | Stephen King | Crawley | Bedford | 26 May 12 | |
| 464 | 51.08 | | | 49.86 | | Hywel Robinson | U23 | -1 | Roger Walters | Channel Islands | Southampton | 30 Jun 12 | |
| 467 | 51.09 | | | 51.09 | PB | Gareth Phillips | | 1 | | Wetherby | Gateshead | 25 Aug 12 | |
| 468 | 51.10 | | | 51.10 | PB | Daniel Wall | U20 | -5 | | Walton | Eton | 25 May 12 | |
| 468 | 51.10 | | | 50.49 | | Dominic Spike | | 1 | Callum Orr | Herts Phoenix | Loughborough | 13 Jun 12 | |
| 468 | 51.10 | | | 50.31/50.3 | | Martin Ferguson | | 3 | | Gateshead | Gateshead | 25 Aug 12 | |
| 471 | 51.1 | | | 51.1 | PB | Tom Graves | U20 | -4 | Keith Holt | Birchfield H | Leicester | 12 May 12 | |
| 471 | 51.1 | | | 50.79/50.3 | | Andrew Cruickshank | U20 | -5 | Keith Bullock | Derby | Nottingham | 13 May 12 | |
| 51.92 | | | | | | | | | | Yate | 24 Jun 12 | |
| 471 | 51.1 | | | 48.76 | | Thomas Gifford | U20 | -4 | Garry Porter | Colchester & Tendring | Basildon | 19 May 12 | |
| 471 | 51.1 | | | 49.94 | | Bernard Ward | V35 | 16 | Stephen Ball | Manchester H | Warrington | 26 May 12 | |
| 52.34 | | | | | | | | | | Stretford | 28 Aug 12 | |
| 471 | 51.1 | | | 52.34i/51.1 | PB | John Brierly | | 2 | Cy Knibb | Bristol & West | Yate | 10 Jun 12 | |
| 52.34 | i | | | | | | | | | Sheffield | 25 Feb 12 | |
| 471 | 51.1 | | | 50.60 | | Romeo Sithole | U23 | -1 | Eliska Binks | Charnwood | Stoke | 1 Jul 12 | |
| 51.45 | | | | | | | | | | Loughborough | 15 Apr 12 | |
| 471 | 51.1 | | | 49.99 | | Aaron Pitt | U17 | -6 | Michael Utting | City of Norwich | Bury St Edmunds | 23 Sep 12 | |
| 51.48 | | | | | | | | | | Watford | 16 May 12 | |
| 478 | 51.11 | | | 50.87 | | Christopher Ladhams | U20 | -4 | Ian Byett | Basingstoke & Mid Hants | Derby | 28 Jul 12 | |
| 479 | 51.13 | | | 51.13 | PB | Richard Brown | | | | Cambridge Uni | Oxford | 19 May 12 | |
| 480 | 51.14 | | | 49.94/49.7 | | James McMurray | U20 | -6 | Deborah Steer | St. Albans AC | Watford | 12 May 12 | |
| 480 | 51.14 | | | 50.13 | | Delroy Mitchell | | 12 | Ron Roddan | Thames Valley | Newham | 27 Jun 12 | |
| 482 | 51.16 | | | 51.16 | PB | Luke Francis | U17 | -6 | Christopher Harris | Bexley | Ashford | 12 May 12 | |
| 483 | 51.17 | i | | 48.05 | | Lennox Thompson | U20 | -4 | Tony Jarrett | Newham & Essex Beagles | Lee Valley | 28 Jan 12 | |
| 52.76 | | | | | | | | | | Derby | 8 Sep 12 | |
| 483 | 51.17 | i | | 50.38 | | Kevin Samuels | U20 | -6 | | Wolverhampton & Bilston | Birmingham | 12 Feb 12 | |
| 51.7 | | | | | | | | | | Wolverhampton | 27 May 12 | |
| 52.30 | | | | | | | | | | Birmingham | 2 Jun 12 | |
| 483 | 51.17 | | | 49.28 | | Ajibola Aderemi | U15 | -8 | Alf Vickers | Victoria Park & Tower Hamlets | Gateshead | 7 Jul 12 | |
| 483 | 51.17 | | | 50.98/50.6 | | Adam Preston | U17 | -6 | Stephen Wymark | Kingston upon Hull | Hull | 15 Jul 12 | |
| 487 | 51.18 | | | 51.18 | PB | Thomas Cusworth | U23 | -3 | Glyn Davies | Wrexham | Connah's Quay | 22 Apr 12 | |
| 487 | 51.18 | | | 51.18/50.6 | PB | James Eccles | U23 | -2 | Callum Orr | Bolton | Loughborough | 30 May 12 | |
| 487 | 51.18 | | | 49.82 | | Stephen Ball | U17 | -7 | | Cambridge H | Watford | 15 Jul 12 | |
| 487 | 51.18 | | | 51.17/50.9 | | Kieran Royston | U20 | -5 | Brian Burgin | Halifax | Cleckheaton | 2 Sep 12 | |
| 491 | 51.19 | | | 51.19 | PB | Mokganedi Maphenduka | | 11 | | Radley | Loughborough | 13 Jun 12 | |
| 492 | 51.20 | | | 47.76 | | Freddie Owsley | U17 | -8 | | Bristol & West | Yate | 12 May 12 | |
| 493 | 51.2 | | | 50.96 | | David Bolton | U23 | -2 | | Southampton | Southampton | 19 May 12 | |
| 51.71 | i | | | | | | | | | Sheffield | 25 Feb 12 | |
| 493 | 51.2 | | | 48.90 | | Charlie Baldwin | U17 | -6 | Alan Easey | Worthing | Hastings | 20 May 12 | |
| 51.37 | | | | | | | | | | Kingston | 23 Jun 12 | |
| 493 | 51.2 | | | 57.89/51.2 | PB | Scott Halsted | U17 | -7 | | Bracknell AC | Reading | 20 May 12 | |
| 493 | 51.2 | | | 51.38/51.2 | PB | Harrison Foster | U23 | -1 | Sam Stanislaus | Bingley | Jarrow | 23 May 12 | |
| 51.38 | | | | | | | | | | Cudworth | 12 May 12 | |
| 493 | 51.2 | | | 48.27 | | George Gundle | U20 | -5 | | Oxfordshire Schs | Abingdon | 17 Jun 12 | |
| 493 | 51.2 | | | 51.46/51.2 | PB | Thomas Butcher | U20 | -6 | Alli Crossman | London City AC | Woking | 30 Jun 12 | |
| 52.27 | | | | | | | | | | Parliament Hill | 12 Sep 12 | |
| 493 | 51.2 | | | 51.44/51.2 | PB | Myles Edwards | | 2 | Mel Edwards | Aberdeen | Aberdeen | 12 Jul 12 | |
| 493 | 51.2 | | | 49.83 | | Chris Hall | | 2 | Richard Holt | Kingston & Poly | Kingston | 14 Jul 12 | |
| 51.36 | | | | | | | | | | Brighton | 21 Jul 12 | |
| 493 | 51.2 | | | 50.41 | | Simon Wake | U20 | -5 | David Rice | Herts Phoenix | Walton | 14 Jul 12 | |
| 493 | 51.2 | | | 50.92 | | Danny Wilson | U20 | -5 | | Havering | Norwich | 22 Jul 12 | |
| 51.78 | | | | | | | | | | Chelmsford | 12 May 12 | |
| 493 | 51.2 | | | 49.21 | | Thomas Bray | U20 | -6 | Richard Phelan | Huntingdonshire | Peterborough | 27 Aug 12 | |
| 51.38 | | | | | | | | | | Lee Valley | 14 Jul 12 | |
| 504 | 51.21 | | | 51.21 | PB | Jonathon Skee | | | | Enfield & Haringey | Chelmsford | 7 Apr 12 | |
| 504 | 51.21 | | | 49.78i | | Matthew Sogbanmu | | 9 | Andy Young | Glasgow Uni | Grangemouth | 14 Apr 12 | |
| 504 | 51.21 | | | 48.67 | | Elliot Scott | U15 | -9 | Norbert Rosser | Taunton | Gateshead | 7 Jul 12 | |
| 504 | 51.21 | | | 51.21 | PB | Horeb Makabukidi | U17 | -7 | | Enfield & Haringey | Sportcity | 2 Sep 12 | |
| 508 | 51.22 | i | | 50.22/50.1 | | Oliver Stringer | U23 | -2 | Trevor Painter | Wigan & District | Birmingham | 4 Feb 12 | |
| 51.7 | | | | | | | | | | Bolton | 26 May 12 | |
| 52.20 | | | | | | | | | | Stretford | 15 May 12 | |
| 508 | 51.22 | | | 50.67/50.1 | | Nick Duggan | | 6 | | Crawley | Crawley | 22 Apr 12 | |
| 510 | 51.23 | | | 51.09 | | Alistair Dalgleish | | 8 | Bill Walker | Livingston | Glasgow (S) | 2 Jun 12 | |
| 511 | 51.24 | | | 50.74 | | Sam Sleap | U23 | -2 | Bill Jewers | Basingstoke & Mid Hants | Bedford | 26 May 12 | |
| 511 | 51.24 | | | 51.24 | PB | Robbie Cuthbert | U20 | -6 | | Pitreavie | Gateshead | 24 Jun 12 | |
| 511 | 51.24 | | | 51.24 | PB | W Harris | | | | Army | Aldershot | 27 Jun 12 | |
| 514 | 51.25 | i | | 51.25i | PB | Matthew Fayers | U20 | -5 | Stevan Dokic | Hillingdon | Lee Valley | 8 Jan 12 | |
| 514 | 51.25 | | | 51.25 | PB | Graeme Lister | | 4 | | Pitreavie | Aberdeen | 20 May 12 | |
| 514 | 51.25 | | | 50.78 | | Benjamin Fowle | U23 | -2 | | Colwyn Bay | Cardiff | 2 Jun 12 | |
| 517 | 51.26 | | | 50.62 | | Joshua Olawore | U20 | -6 | Trevor Wells | Havering | Bedford | 15 Sep 12 | |
| 518 | 51.27 | i | | 51.27i/48.9 | PB | Luke Evans | U23 | -1 | | Blackburn | Sportcity | 16 Dec 12 | |
| 519 | 51.28 | i | | 50.16 | | Eugene Ayanful | U23 | -1 | Christine Harrison-Bloomfield | Woodford Green Essex Ladies | Lee Valley | 28 Jan 12 | |
| 519 | 51.28 | | | 50.90 | | Richard Scott | V35 | 17 | Robert Grew | Exeter | Exeter | 12 May 12 | |
| 519 | 51.28 | | | 47.23 | | Sam Dawkins | U20 | -4 | Geoff King | Jersey | Portsmouth | 13 May 12 | |
| 522 | 51.29 | i | | 48.45i | | Andrew Clements | | 8 | Neil Dodson | Windsor Slough Eton & Hounslow | Lee Valley | 28 Jan 12 | |
| 51.39 | | | | | | | | | | Parliament Hill | 28 Apr 12 | |
| 522 | 51.29 | | | 51.29 | PB | William Rotherforth | U17 | -7 | | Wakefield | Wakefield | 22 Jul 12 | |
| 524 | 51.30 | i | | 49.33/48.8 | | Samuel Landsborough | U23 | -3 | Steven Brick | Wirral | Sportcity | 16 Dec 12 | |
| 525 | 51.3 | | | 49.26 | | Stefan Richards | U20 | -4 | Marina Armstrong | Epsom & Ewell | Bournemouth | 1 Apr 12 | |
| 51.98 | i | | | | | | | | | Sheffield | 25 Feb 12 | |
| 525 | 51.3 | | | 51.80/51.3 | PB | Alexander Skidmore | U20 | -5 | | Notts | Nottingham | 1 Apr 12 | |
| 52.93 | | | | | | | | | | Yate | 24 Jun 12 | |
| 525 | 51.3 | | | 50.21 | | David Awde | | 6 | James Coney | Andover | Andover | 21 Apr 12 | |
| 52.43 | i | | | | | | | | | Lee Valley | 28 Jan 12 | |
| 52.73 | | | | | | | | | | Lee Valley | 14 Apr 12 | |
| 525 | 51.3 | | | 50.20 | | Greg Winfield | | 5 | | Highgate | Hemel Hempstead | 21 Apr 12 | |
| 525 | 51.3 | | | 51.3 | PB | Luke Carroll | U20 | -4 | Andrew Beadle | Cheltenham | Cheltenham | 5 May 12 | |
| 525 | 51.3 | | | 50.94 | | Jakob White | U20 | -4 | | Yate | Yate | 5 May 12 | |
| 51.61 | | | | | | | | | | Yate | 24 Jun 12 | |
| 525 | 51.3 | | | 52.11/51.3 | PB | Peter Conway | U20 | -5 | | Cornwall AC | Carn Brea | 12 May 12 | |
| 52.11 | | | | | | | | | | Exeter | 27 May 12 | |
| 525 | 51.3 | | | 47.84 | | Adam Harvey | U23 | -2 | | Wigan & District | Warrington | 12 May 12 | |
| 52.85 | i | | | | | | | | | Sportcity | 16 Dec 12 | |
| 525 | 51.3 | | | 50.09/50.0 | | Jonathan Hiorns | | 4 | Trevor Muxlow | Notts | Nottingham | 13 May 12 | |
| 525 | 51.3 | | | 51.3 | PB | Stuart Cameron | U23 | -1 | | Stockport | Stockport | 26 May 12 | |
| 525 | 51.3 | | | 49.95/49.8 | | Ian Barough | | 10 | | Cheltenham | Wolverhampton | 27 May 12 | |
| 52.40 | | | | | | | | | | Exeter | 15 Jul 12 | |
| 525 | 51.3 | | | 50.27i | | Nico Constanti | U23 | -1 | | Gloucester | Wolverhampton | 27 May 12 | |
| 525 | 51.3 | | | 50.94 | | Joe Wells | U23 | -3 | Brian MacKenzie | Chelmsford | Chelmsford | 9 Jun 12 | |
| 525 | 51.3 | | | 50.11 | | Adam Bellis | V35 | 14 | | Kingston & Poly | Eton | 4 Jul 12 | |
| 51.70 | | | | | | | | | | Tooting Bec | 18 Aug 12 | |
| 525 | 51.3 | | | 50.78/49.9 | | James Findlay | | 4 | | Shettleston | Crownpoint | 28 Aug 12 | |
| 525 | 51.3 | | | 50.94 | | Tom Powell | U20 | -6 | Graham Holmes | Ipswich | Bury St Edmunds | 23 Sep 12 | |
| 541 | 51.31 | | | 49.54 | | David Brown | | 12 | Tim Needham | Nene Valley | Peterborough | 21 Apr 12 | |
| 542 | 51.32 | | | 51.32 | PB | Lloyd Milner | U20 | -5 | | Medway & Maidstone | Ashford | 13 May 12 | |
| 543 | 51.34 | | | 51.34 | PB | Peter Glass | | 2 | | Liverpool H | Woodford | 21 Apr 12 | |
| 544 | 51.36 | | | 51.36 | PB | Alex North | U20 | -5 | | Edinburgh AC | Edinburgh | 6 Jun 12 | |
| 544 | 51.36 | | | 49.35 | | Gary Smith | | 3 | | Falkirk | Grangemouth | 5 Aug 12 | |
| 546 | 51.37 | | | 51.37 | PB | Mike Sweeney | U23 | -1 | Mike Bull | Liverpool H | Stoke | 4 Aug 12 | |
| 547 | 51.38 | | | 51.38 | PB | Andre Duque | | 2 | | Newham & Essex Beagles | Newham | 23 May 12 | |
| 547 | 51.38 | | | 51.38 | PB | Matthew Bayliss | U23 | -1 | | BRAT | Birmingham | 2 Jun 12 | |
| 549 | 51.40 | i | | 49.95 | | Stephen Goreham | U23 | -2 | Claire Tompsett | Hillingdon | Lee Valley | 15 Jan 12 | |
| 51.68 | | | | | | | | | | Wormwood Scrubs | 1 Sep 12 | |
| 52.8 | | | | | | | | | | Walthamstow | 14 Jul 12 | |
| 549 | 51.40 | | | 49.99 | | Chris Bramah | | 1 | | Trafford | Kessel-Lo, BEL | 18 Aug 12 | |
| 551 | 51.4 | | | 48.44i | | David Brackstone | | 8 | | Sale Harriers Manchester | Kettering | 22 Apr 12 | |
| 551 | 51.4 | | | 52.86/50.8 | | Shaun Wyllie | U20 | -6 | | Bracknell AC | Carshalton | 29 Apr 12 | |
| 551 | 51.4 | | | 48.38 | | James Webster | U20 | -6 | Neville Jones | Warrington AC | Warrington | 12 May 12 | |
| 551 | 51.4 | | | 51.4 | PB | Stephen Jones | U20 | -5 | Paul Waters | Wirral | Liverpool | 26 May 12 | |
| 551 | 51.4 | | | 51.45/50.8 | | Kieran Brown | U17 | -7 | Everton Caines | Solihull & Small Heath | Coventry | 17 Jun 12 | |
| 51.67 | | | | | | | | | | Leicester | 14 Jul 12 | |
| 551 | 51.4 | | | 49.98 | | Ben Wallis | U23 | -1 | Craig Winrow | Guildford & Godalming | Woking | 30 Jun 12 | |
| 551 | 51.4 | | | 50.12 | | Philip Wren | | 5 | | Reading AC | Newport | 21 Jul 12 | |
| 51.53 | | | | | | | | | | Woking | 1 Aug 12 | |
| 558 | 51.41 | | | 51.41/50.9 | PB | Tom Clench | | 5 | John Gates | Bexley | Bromley | 9 Jul 12 | |
| 559 | 51.43 | i | | 51.43i | PB | Aaron Mason | | 5 | | Thames Valley | Birmingham | 4 Feb 12 | |
| 559 | 51.43 | i | | 51.43i | PB | Navid Childs | | 9 | Paul Weston | Thames Valley | Cardiff | 19 Feb 12 | |
| 559 | 51.43 | | | 51.39i | | Jamie Lewis | U20 | -6 | | Giffnock North | Glasgow (S) | 2 Jun 12 | |
| 562 | 51.44 | | | 50.60 | | Jake Littlehales | U23 | -2 | David Turnbull | East Cheshire | Stretford | 28 Aug 12 | |
| 563 | 51.46 | | | 51.05/50.7 | | Stefan Colaco | U23 | -1 | | Harrow | Olympic Park | 5 May 12 | |
| 563 | 51.46 | | | 49.69 | | Tom Syckelmoore | U23 | -3 | Barry Kitcher | Basingstoke & Mid Hants | Portsmouth | 13 May 12 | |
| 563 | 51.46 | | | 49.63 | | Jack Andrew | U23 | -2 | Christopher Bartram | Sale Harriers Manchester | Stretford | 5 Jun 12 | |
| 566 | 51.47 | | | 50.24 | | Dominic Chambers | U17 | -7 | | Derby | Swansea | 22 Jul 12 | |
| 567 | 51.48 | | | 51.48 | PB | Glen Pascal | U23 | -1 | | Luton | Watford | 13 Jun 12 | |
| 567 | 51.48 | | | 48.87 | | Ashley Sandall | U15 | -8 | George Skafidas | Nene Valley | Gateshead | 6 Jul 12 | |
| 567 | 51.48 | | | 48.74 | | Charlie Roe | U23 | -3 | Steven Garrett | Chichester | Stoke | 4 Aug 12 | |
| 567 | 51.48 | | | 50.24 | | Charles Carstairs | U20 | -5 | | Lasswade | Edinburgh | 12 Aug 12 | |
| 567 | 51.48 | | | 51.48 | PB | Niall Curley | U17 | -6 | | Fife | Dunfermline | 9 Sep 12 | |
| 572 | 51.49 | | | 51.49 | PB | Ben Horsley | U23 | -2 | | Tamworth | Kingston | 21 Apr 12 | |
| 572 | 51.49 | | | 51.49 | PB | Donald Carter | U23 | -1 | Kathy Carter | Invicta East Kent | Newham | 27 Jun 12 | |
| 574 | 51.50 | i | | 49.47 | | Jon Rendell | U20 | -4 | Darrell Maynard | Dacorum | Lee Valley | 15 Jan 12 | |
| 51.8 | | | | | | | | | | Hemel Hempstead | 21 Apr 12 | |
| 574 | 51.50 | | | 48.84 | | Sam Malpass | U17 | -6 | Jeffrey Nkrumah | Ilford | Newham | 13 Jun 12 | |
| 574 | 51.50 | | | 50.79 | | Patrick Mills | U17 | -6 | | Rugby & Northampton | Swansea | 22 Jul 12 | |
| 574 | 51.50 | | | 51.50 | PB | Max Hall | | 4 | | Kent | Carshalton | 8 Sep 12 | |
| 578 | 51.5 | | | 52.39/51.5 | PB | Stephen List | U23 | -1 | Sonya Ellis | Nuneaton | Exeter | 14 Mar 12 | |
| 578 | 51.5 | | | 51.61/50.7 | | Luke Hasted | U20 | -5 | | North Devon | Swindon | 21 Apr 12 | |
| 578 | 51.5 | | | 50.51 | | David Munro | U23 | -2 | Howard Court | Wolverhampton & Bilston | Cheltenham | 5 May 12 | |
| 51.63 | i | | | | | | | | | Birmingham | 12 Feb 12 | |
| 578 | 51.5 | | | 51.94i/51.5 | PB | Josh Platt | U17 | -6 | Stephen Walker | Crewe & Nantwich | Warrington | 12 May 12 | |
| 578 | 51.5 | | | 51.5 | PB | Gregory Fronton | | 1 | | Colchester & Tendring | Basildon | 19 May 12 | |
| 578 | 51.5 | | | 51.55/51.5 | PB | Liam Skyner | U17 | -6 | Robert Roberts | Liverpool H | Bebington | 20 May 12 | |
| 51.55 | | | | | | | | | | Wigan | 30 Jun 12 | |
| 578 | 51.5 | | | 51.5 | PB | Jack Hepple | U20 | -6 | | Morpeth | Jarrow | 26 May 12 | |
| 578 | 51.5 | | | 52.05/50.4 | | Ashley Hart | U17 | -6 | Geoffrey Barraclough | City of York | York | 9 Jun 12 | |
| 52.05 | | | | | | | | | | Stretford | 22 Jul 12 | |
| 578 | 51.5 | | | 51.49/51.3 | | Edward Cherry | U17 | -7 | | Kettering | Bromsgrove | 10 Jun 12 | |
| 51.79 | | | | | | | | | | Leicester | 14 Jul 12 | |
| 578 | 51.5 | | | 51.1 | | Paul White | | 5 | Stan Markley | Middlesbrough (Mandale) | Middlesbrough | 1 Jul 12 | |
| 578 | 51.5 | | | 51.71i/51.5 | PB | James Griffith | U23 | -3 | Mike Bilson | BRAT | Telford | 8 Sep 12 | |
| 52.40 | | | | | | | | | | Loughborough | 13 Jun 12 | |
| 578 | 51.5 | i | | 51.41/51.0 | | Eric Nyangezi | U23 | -2 | Ty Holden | Ilford | Lee Valley | 5 Dec 12 | |
| 52.1 | | | | | | | | | | Battersea Park | 28 Apr 12 | |
| 52.59 | i | | | | | | | | | Sheffield | 25 Feb 12 | |
| 590 | 51.51 | | | 51.19/50.4 | | John Gilding | | 7 | | Charnwood | Loughborough | 16 May 12 | |
| 591 | 51.52 | | | 51.25 | | Michael Burns | | 2 | | Pitreavie | Grangemouth | 15 Jul 12 | |
| 591 | 51.52 | | | 51.52 | PB | Andrew Parsonage | U20 | -4 | | Manchester H | Stretford | 31 Jul 12 | |
| 593 | 51.53 | | | 50.16 | | Stephen Mackay | U23 | -3 | Charles Forbes | Inverness | Inverness | 16 Sep 12 | |
| 594 | 51.55 | | | 50.69 | | Scott MacAulay | U23 | -3 | Robert Hawkins | Kilbarchan | Aberdeen | 20 May 12 | |
| 595 | 51.56 | | | 51.56/51.2 | PB | Adam Smith | U23 | -2 | David Leach | Brighton & Hove | Crawley | 20 Jun 12 | |
| 596 | 51.57 | | | 51.11 | | Matthew Baker | U23 | -3 | Colin Bovell | Horsham Blue Star | Brighton | 15 Aug 12 | |
| 597 | 51.58 | i | | 51.06 | | Todd Marshall | | 1 | Richard Hollingsworth | City of Sheffield | Sheffield | 14 Jan 12 | |
| 597 | 51.58 | | | 50.80 | | Michael Fairfield | | 1 | Robert Roberts | Liverpool H | Liverpool | 12 May 12 | |
| 597 | 51.58 | | | 50.40 | | Tom Pye | U23 | -3 | Ty Holden | Enfield & Haringey | Hendon | 16 Jun 12 | |
| 597 | 51.58 | | | 49.63 | | Dylan Doggett | U17 | -6 | Bryn Percival | Cambridge & Coleridge | Peterborough | 23 Jun 12 | |
| 601 | 51.59 | | | 50.51/50.1 | | Tom Purton | U20 | -6 | | Marshall Milton Keynes | Peterborough | 21 Apr 12 | |
| 602 | 51.60 | | | 51.06/50.8 | | James Ansell | | 4 | | Exeter | Exeter | 15 Jul 12 | |
| 602 | 51.60 | | | 50.39 | | Matthew Muggeridge | V35 | 14 | Graham Howell | Yate | Derby | 21 Jul 12 | |
| 604 | 51.6 | | | 51.90/51.2 | | Charlie Waterhouse | U20 | -5 | | Notts | Nottingham | 1 Apr 12 | |
| 51.90 | | | | | | | | | | Don Valley | 22 Apr 12 | |
| 604 | 51.6 | | | 51.93i/51.6 | PB | George Walmsley | U17 | -6 | | Manx | Douglas | 30 Apr 12 | |
| 51.93 | i | | | | | | | | | Birmingham | 25 Feb 12 | |
| 604 | 51.6 | | | 51.6 | PB | Curtis Bicknell | U17 | -7 | | Leamington | Leamington | 6 May 12 | |
| 604 | 51.6 | | | 48.43 | | Joshua Ingham | U20 | -6 | Stephen James | Preston | Blackpool | 12 May 12 | |
| 51.77 | | | | | | | | | | Wrexham | 12 Aug 12 | |
| 604 | 51.6 | | | 50.70 | | Harry Baxter | U20 | -6 | Mark Baddeley | Lincoln Wellington | Grantham | 12 May 12 | |
| 604 | 51.6 | | | 53.02/51.6 | PB | Jack Hillier | U23 | -1 | Keith Scofield | Wycombe | Jarrow | 23 May 12 | |
| 604 | 51.6 | | | 52.25/51.6 | PB | James Thomas | V35 | 14 | Steven Gillingham | Woking | Ewell | 26 May 12 | |
| 52.49 | | | | | | | | | | Woking | 1 Aug 12 | |
| 604 | 51.6 | | | 48.65 | | Junior George | U23 | -2 | John Henson | Holmfirth | Hull | 26 May 12 | |
| 604 | 51.6 | | | 51.13 | | James Trollope | | 2 | | Birchfield H | Birmingham (Un) | 30 May 12 | |
| 604 | 51.6 | | | 52.93/51.6 | PB | Jack Hall | U17 | -6 | Paul Tasker | Tamworth | Leamington Spa | 16 Jun 12 | |
| 52.93 | | | | | | | | | | Bedford | 18 Aug 12 | |
| 604 | 51.6 | | | 51.6 | PB | S Jones | U20 | -4 | | Cheshire Schs | Macclesfield | 16 Jun 12 | |
| 604 | 51.6 | | | 52.86/51.6 | PB | Gaius Bews | U20 | -5 | | Orkney | Kirkwall | 17 Jun 12 | |
| 52.86 | | | | | | | | | | Grangemouth | 8 Jun 12 | |
| 604 | 51.6 | | | 48.85 | | Dominic Walton | U20 | -4 | | Blackburn | Hyndburn | 24 Jun 12 | |
| 604 | 51.6 | | | 51.59/51.1 | | Jacob Weir | U20 | -6 | | Preston | Preston | 1 Jul 12 | |
| 604 | 51.6 | | | 50.05 | | Neville Harris | U23 | -3 | Rodger Hughes | Sutton & District | Carshalton | 14 Jul 12 | |
| 52.14 | | | | | | | | | | Crawley | 20 Jun 12 | |
| 604 | 51.6 | | | 51.30 | | Massi Dendani | U20 | -5 | Dave Naylor | Havering | Norwich | 22 Jul 12 | |
| 51.95 | | | | | | | | | | Woodford | 11 Sep 12 | |
| 604 | 51.6 | | | 51.48/50.0 | | Stephen Sumner | | 2 | Ann Pickering | Hyndburn | Bury | 5 Aug 12 | |
| 604 | 51.6 | | | 48.96 | | Elliot Heath | U20 | -4 | Anne Stewart | Giffnock North | Scotstoun | 19 Aug 12 | |
| 604 | 51.6 | | | 50.20 | | David Kerr | U20 | -4 | William Parker | Kilbarchan | Crownpoint | 28 Aug 12 | |
| 604 | 51.6 | | | 52.08/51.6 | PB | Ben Parry | U23 | -3 | Catherine Walker | Herts Phoenix | Norwich | 1 Sep 12 | |
| 52.08 | | | | | | | | | | Woodford | 7 Jul 12 | |
| 604 | 51.6 | | | 51.07/50.8 | | Oliver Best | U20 | -5 | Vespa Ellis | Basildon | Abingdon | 15 Sep 12 | |
| 52.70 | | | | | | | | | | Lee Valley | 14 Apr 12 | |
| 625 | 51.61 | | | 51.61 | PB | William Reynolds | U20 | -6 | Stephen Carroll | Liverpool H | Liverpool | 12 May 12 | |
| 625 | 51.61 | | | 51.61 | PB | Adam Simms | U20 | -4 | Sam Stanislaus | Altrincham | Hull | 14 Jul 12 | |
| 627 | 51.62 | | | 51.62 | PB | Joe Mellor | U23 | -1 | Grant Barker | Notts | Birmingham | 2 Jun 12 | |
| 627 | 51.62 | | | 50.54 | | Thomas Ashby | U23 | -1 | | Herne Hill | Hexham | 30 Jun 12 | |
| 629 | 51.64 | | | 49.82 | | Calum Brown | U23 | -2 | | Central | Stoke | 4 Aug 12 | |
| 629 | 51.64 | | | 51.11/51.0 | | Sam Bishop | | 11 | Greg Richards | City of Stoke | Stoke | 4 Aug 12 | |
| 631 | 51.65 | | | 50.95/50.8 | | George Hadler | U17 | -6 | Tony Benton | Havering | Chelmsford | 7 Apr 12 | |
| 631 | 51.65 | | | 51.57 | | James Meadows | | 1 | Richard Thurston | Woodford Green Essex Ladies | Exeter | 24 Apr 12 | |
| 631 | 51.65 | | | 51.31 | | Elliott Dorey | U20 | -5 | | Jersey | Swansea | 18 Aug 12 | |
| 634 | 51.66 | | | 46.75/46.4 | | Chris McAlister | U17 | -6 | Marina Armstrong | Sutton & District | Kingston | 23 Jun 12 | |
| 635 | 51.67 | | | 51.67 | PB | James Collier | | | | Unattached | Tooting Bec | 21 Jul 12 | |
| 635 | 51.67 | | | 51.67 | PB | Nick Davis | U20 | -4 | | Harrow | Milton Keynes | 1 Sep 12 | |
| 637 | 51.68 | | | 51.15/50.9 | | Curtis Goodger | U20 | -5 | David Goodger | Newport H | Cardiff | 12 May 12 | |
| 637 | 51.68 | | | 51.68 | PB | Sam Wightman | U20 | -5 | | Edinburgh AC | Edinburgh | 6 Jun 12 | |
| 639 | 51.7 | | | 50.65 | | Adriano Ritchie | U20 | -5 | | Stratford-upon-Avon | Yate | 5 May 12 | |
| 52.31 | i | | | | | | | | | Birmingham | 5 Feb 12 | |
| 639 | 51.7 | | | 52.90/51.7 | PB | Thomas Marsden | U20 | -5 | | Vale Royal | Warrington | 12 May 12 | |
| 52.90 | | | | | | | | | | Stretford | 1 May 12 | |
| 639 | 51.7 | | | 52.36/51.5 | | David Villota | U23 | -2 | | South London | Bedford (Match 1) | 19 May 12 | |
| 52.36 | | | | | | | | | | Kingston | 21 Apr 12 | |
| 639 | 51.7 | | | 51.08 | | Jake Berney | U17 | -6 | Roy Thickpenny | Peterborough | Cambridge | 27 May 12 | |
| 51.87 | | | | | | | | | | Peterborough | 12 May 12 | |
| 639 | 51.7 | | | 50.40i/50.3 | | Yesper Adams | U20 | -5 | Martin Owens | Cheltenham | Wolverhampton | 27 May 12 | |
| 52.94 | i | | | | | | | | | Cardiff | 8 Jan 12 | |
| 639 | 51.7 | | | 52.11/51.1 | | Howard Stringer | U20 | -4 | | Shrewsbury | Telford | 28 May 12 | |
| 639 | 51.7 | | | 49.76 | | Muiris Egan | U17 | -7 | Zac Kerin | Bournemouth | Bournemouth | 10 Jun 12 | |
| 52.05 | | | | | | | | | | Exeter | 23 Jun 12 | |
| 639 | 51.7 | | | 52.83/51.7 | PB | Jivendra Singh | U17 | -8 | Noel Stoddart | Windsor Slough Eton & Hounslow | Winchester | 17 Jun 12 | |
| 52.83 | | | | | | | | | | Sportcity | 2 Sep 12 | |
| 639 | 51.7 | | | 51.70/50.5 | | Alex Martin | U17 | -7 | Mark Pauley | Poole AC | Street | 20 Jun 12 | |
| 639 | 51.7 | | | 49.29 | | Matthew Jones | U17 | -7 | | Oswestry | Brierley Hill | 24 Jun 12 | |
| 51.78 | | | | | | | | | | Ashford | 21 Jul 12 | |
| 639 | 51.7 | | | 53.37/51.5 | | Falai Baldeh | | 4 | | Cambridge & Coleridge | Colchester | 1 Jul 12 | |
| 639 | 51.7 | | | 51.32 | | Adam Hobson | U20 | -4 | Dianne Chisholm | Inverness | Inverness | 12 Aug 12 | |
| 52.13 | | | | | | | | | | Grangemouth | 15 Jul 12 | |
| 639 | 51.7 | | | 52.66i/51.7 | PB | Kyle Readdin | U23 | -3 | | Crewe & Nantwich | Litherland | 1 Sep 12 | |
| 652 | 51.71 | | | 50.27i/49.3 | | Matthew Turner | | 1 | | Shettleston | Grangemouth | 5 Aug 12 | |
| 653 | 51.72 | | | 51.72 | PB | Romaine Hyman | U23 | -2 | Alastair Abrams | Team Bath | Yate | 12 May 12 | |
| 654 | 51.73 | | | 51.73/51.7 | PB | Stephen Kelly | U23 | -1 | | Highgate | Olympic Park | 5 May 12 | |
| 654 | 51.73 | | | 51.62 | | Chris Baber | U23 | -2 | | Tynedale | Gateshead | 12 May 12 | |
| 654 | 51.73 | | | 49.58 | | Andrew Mapstone | | 2 | Adrian Webb | Yeovil | Swansea | 18 Aug 12 | |
| 657 | 51.74 | | | 51.74 | PB | Kimmel Gordon | U20 | -6 | Clarence Callender | Shaftesbury Barnet | Hendon | 12 Aug 12 | |
| 658 | 51.75 | i | | 51.41 | | Richard Chappell | | 2 | Wynford Leyshon | Cardiff | Sheffield | 25 Feb 12 | |
| 51.85 | | | | | | | | | | Swansea | 10 Jun 12 | |
| 658 | 51.75 | | | 51.75 | PB | Femi Agbetoyin | U17 | -6 | | Croydon | Hendon | 29 Jul 12 | |
| 658 | 51.75 | | | 51.62i | | Cameron Martin | U20 | -5 | Chris McCrum | Motherwell | Wishaw | 19 Aug 12 | |
| 661 | 51.76 | | | 51.76 | PB | Osho Taylor | U20 | -4 | Martyn Jones | Manchester H | Stretford | 3 Jul 12 | |
| 661 | 51.76 | | | 51.30 | | Llyr Jamieson | U20 | -6 | Delyth Brown | Carmarthen | Aberdeen | 11 Aug 12 | |
| 663 | 51.77 | | | 51.77 | PB | Nikita Katende | U17 | -8 | Blake Ellis | Trafford | Stretford | 31 Jul 12 | |
| 664 | 51.79 | | | 51.79 | PB | Samuel Afriyie | U20 | -5 | Darren Braithwaite | Enfield & Haringey | Bromley | 22 Jul 12 | |
| 664 | 51.79 | | | 50.50 | | Richard Sackey | U20 | -5 | Catherine Walker | Herts Phoenix | Hendon | 12 Aug 12 | |
| 666 | 51.80 | i | | 51.80i | PB | Aaron Bandoo | U20 | -4 | | Wolverhampton & Bilston | Birmingham | 25 Feb 12 | |
| 51.8 | | | | | | | | | | Tipton | 15 Apr 12 | |
| 51.92 | | | | | | | | | | Leicester | 14 Jul 12 | |
| 666 | 51.80 | | | 51.80 | PB | Scott Gregory | U20 | -5 | Anthony Pitt | Birchfield H | Yate | 24 Jun 12 | |
| 668 | 51.8 | | | 51.36/50.7 | | Quincie Michael | U20 | -4 | Chris Zah | Victoria Park & Tower Hamlets | Bedford | 5 May 12 | |
| 668 | 51.8 | | | 52.25/51.8 | PB | David Allan | U20 | -5 | | Dunfermline & West Fife (Defunct) | Edinburgh | 12 May 12 | |
| 52.67 | | | | | | | | | | Grangemouth | 4 Jul 12 | |
| 668 | 51.8 | | | 49.24i | | Daniel Williams | | 8 | | Sale Harriers Manchester | Corby | 13 May 12 | |
| 668 | 51.8 | | | 50.96 | | Simon Davies | U20 | -4 | | Yeovil | Jarrow | 23 May 12 | |
| 51.85 | | | | | | | | | | Southampton | 30 Jun 12 | |
| 668 | 51.8 | | | 51.11/50.5 | | James Lea | U23 | -2 | | Nuneaton | Sutton Coldfield | 27 May 12 | |
| 668 | 51.8 | | | 51.8 | PB | Richard Brown | U23 | -2 | | Herts Phoenix | Welwyn | 9 Jun 12 | |
| 668 | 51.8 | | | 51.8 | PB | Craig Harvey | U17 | -8 | Rick Betts | Middlesbrough (Mandale) | Hyndburn | 24 Jun 12 | |
| 668 | 51.8 | | | 50.43 | | Marcus Quarmby | U20 | -4 | Brian Craig | Blackpool, Wyre & Fylde | Ellesmere Port | 1 Jul 12 | |
| 52.20 | | | | | | | | | | Stretford | 5 Jun 12 | |
| 668 | 51.8 | | | 50.58 | | Ben Jones | U23 | -3 | Tim Needham | Nene Valley | Walton | 14 Jul 12 | |
| 668 | 51.8 | | | 50.71 | | Patrick Lucas | U17 | -7 | Mike Fleet | Croydon | Croydon | 22 Jul 12 | |
| 52.33 | | | | | | | | | | Croydon | 20 May 12 | |
| 668 | 51.8 | | | 50.24 | | James Colclough | | 11 | Gordon Ainsley | BRAT | Rugby | 4 Aug 12 | |
| 52.77 | | | | | | | | | | Loughborough | 27 May 12 | |
| 668 | 51.8 | | | 51.81i/51.8 | PB | Adam Barnes | U23 | -3 | | Royal Sutton Coldfield | Kettering | 19 Aug 12 | |
| 52.02 | | | | | | | | | | Birmingham | 2 Jun 12 | |
| 668 | 51.8 | | | 52.23/51.8 | PB | Josh Abraham-Steele | | 3 | Jennifer O'Shea | Marshall Milton Keynes | Kettering | 19 Aug 12 | |
| 681 | 51.81 | | | 51.18 | | James Clayton | U20 | -4 | Laurence Garnham | Newquay & Par | Aberdare | 24 Jun 12 | |
| 682 | 51.83 | | | 50.88 | | Sam Poulton | | 1 | Paul Keeble | Stevenage & North Herts | Olympic Park | 5 May 12 | |
| 683 | 51.84 | | | 51.84 | PB | Ben Jones | U17 | -6 | | Derby | Birmingham | 22 Apr 12 | |
| 683 | 51.84 | | | 50.95i/50.6 | | Mark Fallaize | | 3 | Andrew Henderson | Vale of Aylesbury | Olympic Park | 5 May 12 | |
| 683 | 51.84 | | | 50.23 | | Daniel Kelland | U20 | -6 | Stephen Endacott | City of Plymouth | Exeter | 23 Jun 12 | |
| 686 | 51.85 | | | 50.80/50.0 | | James Blackburn | U20 | -4 | | Pendle | Wakefield | 7 Apr 12 | |
| 687 | 51.86 | | | 50.23 | | Michael Quinn | | 8 | | Unattached | Antrim | 24 Jun 12 | |
| 687 | 51.86 | | | 49.94 | | Rikkie Letch | U23 | -3 | Conrad Milton | Windsor Slough Eton & Hounslow | Gateshead | 30 Jun 12 | |
| 689 | 51.87 | | | 49.67 | | Aqeel Hassan | U23 | -3 | Joseph McDonnell ☘️ | Charnwood | Olympic Park | 5 May 12 | |
| 689 | 51.87 | | | 47.71 | | Mark Cottam | U17 | -7 | Alastair Abrams | Yate | Exeter | 23 Jun 12 | |
| 689 | 51.87 | | | 50.41 | | Jack Robb | U17 | -7 | Rachel Edgar | Fife | Dunfermline | 9 Sep 12 | |
| 692 | 51.88 | | | 51.00 | | Eben Marsh | U17 | -6 | | Guernsey | St. Peter Port | 9 Jun 12 | |
| 693 | 51.9 | | | 52.32/51.9 | PB | James Foster | | 3 | | Notts | Nottingham | 1 Apr 12 | |
| 52.32 | | | | | | | | | | Olympic Park | 5 May 12 | |
| 693 | 51.9 | | | 49.64 | | Greg Whitehouse | U20 | -6 | Darren Lewis | Tipton | Birmingham (Un) | 30 May 12 | |
| 693 | 51.9 | | | 54.12i/51.9 | PB | Peter Saunders | U20 | -6 | Mark Shepherd | Team Kennet | Watford | 30 Jun 12 | |
| 693 | 51.9 | | | 52.91/51.9 | PB | E Samu | | | | Army | Colchester | 5 Jul 12 | |
| 693 | 51.9 | | | 49.08 | | Joseph O'Hara | U17 | -7 | Richard Long | Bexley | Croydon | 22 Jul 12 | |
| 693 | 51.9 | | | 51.9 | PB | Sean Chalmers | U17 | -6 | | Inverness | Inverness | 12 Aug 12 | |
| 693 | 51.9 | | | 48.71 | | Yannick Phippen | U23 | -3 | Andy Paul | Birchfield H | Kettering | 19 Aug 12 | |
| 693 | 51.9 | | | 50.88 | | Luke Fleming | U20 | -6 | | Royal Sutton Coldfield | Peterborough | 27 Aug 12 | |
| 52.97 | i | | | | | | | | | Birmingham | 19 Feb 12 | |
| 693 | 51.9 | | | 49.43 | | Richard Rubenis | V35 | 17 | Roger Walters | Telford AC | Telford | 8 Sep 12 | |
| 52.09 | | | | | | | | | | Zittau, GER | 21 Aug 12 | |
| 702 | 51.91 | | | 50.68/49.9 | | Patrick Channings | U15 | -8 | Adam Tofield | Tavistock | Gateshead | 6 Jul 12 | |
| 702 | 51.91 | | | 46.39 | | Alex Fugallo | V40 | 20 | | Shaftesbury Barnet | Woodford | 7 Jul 12 | |
| 702 | 51.91 | | | 50.53 | | Andrew Keat | U17 | -6 | | Bolton | Stretford | 31 Jul 12 | |
| 705 | 51.92 | | | 51.92/50.7 | PB | Ollie Pilton | U20 | -5 | | Yeovil | Exeter | 8 Jul 12 | |
| 705 | 51.92 | | | 51.92/51.4 | PB | Fraser Carlisle | U23 | -1 | | Wycombe | Watford | 11 Jul 12 | |
| 707 | 51.94 | i | | 51.18 | | Mark Booth | U23 | -2 | Janet Nash | Wycombe | Lee Valley | 8 Jan 12 | |
| 52.91 | | | | | | | | | | Horspath | 21 Apr 12 | |
| 708 | 51.95 | | | 51.95 | PB | Aaron Partridge | U20 | -5 | | Larkhall | Grangemouth | 8 Jun 12 | |
| 708 | 51.95 | | | 51.04 | | Ben Burton | U20 | -4 | Darren Hatton | Invicta East Kent | Abingdon | 9 Jun 12 | |
| 710 | 51.96 | i | | 51.02/50.3 | | Sean Reidy | | 9 | Tim Needham | Nene Valley | Birmingham | 4 Feb 12 | |
| 52.58 | | | | | | | | | | Peterborough | 12 May 12 | |
| 710 | 51.96 | | | 49.67 | | Gavin Stephens | | 13 | | Worthing | Crawley | 8 Apr 12 | |
| 710 | 51.96 | | | 51.17i/51.1 | | Charlie Patrick | U23 | -3 | Darrell Maynard | City of Salisbury | Loughborough | 28 Apr 12 | |
| 710 | 51.96 | | | 51.96 | PB | George Chapman | U17 | -8 | Adrian Clover | Team Bath | Yate | 2 Sep 12 | |
| 714 | 51.97 | | | 51.97 | PB | Calum Green | U20 | -6 | | Inverness | Inverness | 16 Sep 12 | |
| 715 | 51.98 | | | 51.73 | | Andrew Holliman | U20 | -4 | Peter Barry | Harrow | Watford | 4 Apr 12 | |
| 716 | 51.99 | | | 51.99/51.4 | PB | Jason Misso | U15 | -8 | Catherine Walker | Herts Phoenix | Gateshead | 7 Jul 12 | |
| 717 | 52.00 | | | 52.00 | PB | Aaron Kaye | U23 | -3 | | Southend | Basingstoke | 26 May 12 | |
| 718 | 52.0 | | | 50.93/50.7 | | Simon King | U23 | -1 | | Tamworth | Yate | 5 May 12 | |
| 718 | 52.0 | | | 53.44/52.0 | PB | Daniel Welsby | U17 | -6 | Les Hall | Bolton | Warrington | 12 May 12 | |
| 718 | 52.0 | | | 52.40/50.9 | | Joe Madge | U23 | -2 | | Grantham AC | Grantham | 1 Jul 12 | |
| 52.40 | | | | | | | | | | Loughborough | 6 Jun 12 | |
| 718 | 52.0 | | | 50.54/50.5 | | Patrick Atkin | U20 | -5 | Ben Frary | Cleethorpes | Rotherham | 1 Jul 12 | |
| 52.36 | | | | | | | | | | Stretford | 19 Jun 12 | |
| 718 | 52.0 | | | 50.09i | | Dave Ragan | | 7 | Martin Tarsey | Basingstoke & Mid Hants | Plymouth | 1 Sep 12 | |
| 718 | 52.0 | | | 52.09/50.4 | | Jim Tipper | V40 | 18 | Roger Walters | Telford AC | Telford | 8 Sep 12 | |
| 724 | 52.02 | | | 52.02 | PB | David Lee | U23 | -3 | Stewart Marshall | Coventry | Loughborough | 27 May 12 | |
| 724 | 52.02 | | | 52.02 | PB | Owen Edobor | U17 | -7 | | Essex Schs | Chelmsford | 16 Jun 12 | |
| 724 | 52.02 | | | 52.02 | PB | Danny Browitt | U23 | -3 | | Wigan & District | Stretford | 4 Sep 12 | |
| 724 | 52.02 | | | 50.22 | | Stewart Clark | U20 | -4 | Eddie McKenna | Banchory Stonehaven | Inverness | 16 Sep 12 | |
| 728 | 52.03 | | | 52.03 | PB | Omar Mukhtar | U17 | -7 | Alf Vickers | Victoria Park & Tower Hamlets | Mile End | 12 May 12 | |
| 729 | 52.04 | | | 52.04 | PB | Matt Holmes | U20 | -5 | Vicente Modahl | Sale Harriers Manchester | Stretford | 3 Jul 12 | |
| 729 | 52.04 | | | 52.04 | PB | Owen McArdle | U23 | -2 | Paul Smith | Chester-le-Street | Gateshead | 25 Aug 12 | |
| 731 | 52.06 | | | 52.06 | PB | Ryan Ganose | U20 | -4 | | Altrincham | Stretford | 5 Jun 12 | |
| 732 | 52.08 | | | 51.62/51.6 | | Robert Churchill | U20 | -4 | Callum Orr | Swindon | Loughborough | 28 Apr 12 | |
| 732 | 52.08 | | | 52.08 | PB | Aled Thomas | U20 | -5 | Barry Edwards | Menai | Stretford | 3 Jul 12 | |
| 732 | 52.08 | | | 52.08 | PB | Taylor Hartman | U15 | -8 | | Chelmsford | Gateshead | 6 Jul 12 | |
| 735 | 52.09 | | | 51.99 | | Jack Farmer | U17 | -6 | | Thurrock | Chelmsford | 16 Jun 12 | |
| 735 | 52.09 | | | 51.73 | | Gareth Lake | U20 | -5 | | Aberdeen | Grangemouth | 26 Aug 12 | |
| 737 | 52.10 | | | 52.10 | PB | Joseph Coleshaw | U20 | -5 | Trevor Muxlow | Notts | Swansea | 22 Jul 12 | |
| 738 | 52.1 | | | 51.07 | | Christopher Marshall | U23 | -2 | Darrell Maynard | City of Norwich | Norwich | 24 Mar 12 | |
| 52.12 | i | | | | | | | | | Cardiff | 19 Feb 12 | |
| 738 | 52.1 | | | 49.84 | | John Merrett | V35 | 17 | | Cheltenham | Cheltenham | 5 May 12 | |
| 738 | 52.1 | | | 52.04 | | Ben Ridley-Johnson | U20 | -4 | | Colchester H | Colchester | 19 May 12 | |
| 52.74 | | | | | | | | | | Chelmsford | 12 May 12 | |
| 738 | 52.1 | | | 50.64/50.1 | | Hari Mehta | | 2 | | Harrow | Harrow | 19 May 12 | |
| 738 | 52.1 | | | 52.33/51.7 | | James Tartt | | 6 | | Southport Waterloo | Warrington | 26 May 12 | |
| 738 | 52.1 | | | 49.62 | | Timothy Tetlow | U20 | -4 | | Durham | York | 26 May 12 | |
| 52.51 | | | | | | | | | | Gateshead | 12 May 12 | |
| 738 | 52.1 | | | 51.0 | | Wade Bennett-Jackson | | 3 | Linford Christie | Belgrave | Croydon | 30 May 12 | |
| 738 | 52.1 | | | 52.13/51.0 | | Dan Pidgeon | U23 | -1 | Neil England | Swindon | Swindon | 9 Jun 12 | |
| 738 | 52.1 | | | 52.09 | | George Rose | U17 | -6 | | Shaftesbury Barnet | Hemel Hempstead | 16 Jun 12 | |
| 738 | 52.1 | | | 57.10/52.1 | PB | Matthew Shirling | U17 | -6 | Adrian Webb | Liverpool H | Sportcity | 17 Jun 12 | |
| 738 | 52.1 | | | 51.02/50.5 | | Jack Lynch | U17 | -7 | Sara MacDonald-Gray | Southampton | Walton | 14 Jul 12 | |
| 52.98 | | | | | | | | | | Hendon | 29 Jul 12 | |
| 738 | 52.1 | | | 52.82/51.4 | | Nicholas Mbewe | U17 | -6 | | Royal Sutton Coldfield | Kettering | 21 Jul 12 | |
| 738 | 52.1 | | | 49.38 | | Leon Greenwood | U17 | -8 | Stuart Hall | Spenborough | York | 12 Aug 12 | |
| 738 | 52.1 | | | 50.50 | | Jack Strachan | U17 | -7 | | City of Norwich | Ware | 19 Aug 12 | |
| 52.22 | | | | | | | | | | Peterborough | 23 Jun 12 | |
| 738 | 52.1 | | | 50.30 | | Callum Drummond | U17 | -7 | John McLaren | Shettleston | Crownpoint | 28 Aug 12 | |
| 738 | 52.1 | | | 53.38/52.1 | PB | Sean Perkins | U23 | -1 | | Rushcliffe | Grantham | 2 Sep 12 | |
| 738 | 52.1 | | | 49.51 | | Simon Tinsley | U23 | -2 | | Tonbridge | Oxford | 4 Nov 12 | |
| 755 | 52.12 | | | 51.25i | | Kenneth Love | U23 | -2 | | Glasgow City | Aberdeen | 20 May 12 | |
| 755 | 52.12 | | | 48.72 | | Elliot Holland | U15 | -8 | | West Norfolk | Gateshead | 6 Jul 12 | |
| 757 | 52.13 | | | 51.56 | | Samuel Sanchas | U20 | -4 | | Victoria Park & Tower Hamlets | Derby | 27 May 12 | |
| 758 | 52.14 | | | 50.69 | | Luca Chiossone | U17 | -7 | Ian Byett | Basingstoke & Mid Hants | Portsmouth | 13 May 12 | |
| 759 | 52.15 | | | 52.15 | PB | Calum Rowe | U20 | -5 | | Southampton | Portsmouth | 13 May 12 | |
| 759 | 52.15 | | | 52.15 | PB | John Wright | U23 | -2 | Jonathan Tilt | Southampton | Southampton | 16 Sep 12 | |
| 761 | 52.17 | | | 48.78 | | Simbarashe Rwambiwa | U17 | -6 | Femi Akinsanya | Birchfield H | Sportcity | 2 Sep 12 | |
| 762 | 52.18 | | | 52.18 | PB | Kevwe Asagba | U20 | -5 | | Somerset Schs | Yeovil | 13 May 12 | |
| 762 | 52.18 | | | 51.83 | | David Bush | U23 | -3 | Arthur Simmonds | Nene Valley | Bedford | 26 May 12 | |
| 762 | 52.18 | | | 51.10 | | Harry Sagel | U20 | -5 | | Shaftesbury Barnet | Serrahima, ESP | 30 May 12 | |
| 762 | 52.18 | | | 52.18 | PB | Kyle Conway | U20 | -6 | Danny Gray | Sale Harriers Manchester | Stretford | 5 Jun 12 | |
| 766 | 52.19 | | | 50.13 | | Oliver Hopkins | U20 | -5 | Vicky Huyton | Blackpool, Wyre & Fylde | Stretford | 15 May 12 | |
| 766 | 52.19 | | | 52.19 | PB | Owin Sinclair | U15 | -8 | Philip Evans | Charnwood | Loughborough | 6 Jun 12 | |
| 766 | 52.19 | | | 52.19 | PB | Riyadh Bhyat | | 7 | | Oxford Uni | Woking | 1 Aug 12 | |
| 766 | 52.19 | | | 51.68i/51.5 | | Jesse Roberts | U20 | -5 | | Liverpool Pembroke Sefton | Wrexham | 12 Aug 12 | |
| 770 | 52.20 | | | 52.20 | PB | Jonathan Green | U20 | -5 | | Semeac Olympic | Pau, FRA | 31 Mar 12 | |
| 771 | 52.2 | | | 51.47/50.8 | | Dan Barber | | 3 | Scott Grace | Vale of Aylesbury | Hemel Hempstead | 21 Apr 12 | |
| 771 | 52.2 | | | 47.81 | | Columba Blango | U23 | -3 | Mick Bond | South London | Gillingham | 5 May 12 | |
| 771 | 52.2 | | | 51.00 | | Darren Thomson | | 1 | | Edinburgh AC | Edinburgh | 12 May 12 | |
| 771 | 52.2 | | | 48.65 | | Tommy Ramdhan | U17 | -7 | Christopher Harris | Bexley | Eltham | 20 May 12 | |
| 771 | 52.2 | | | 50.69 | | Ryan Pike | U17 | -8 | | Colwyn Bay | Leigh | 20 May 12 | |
| 771 | 52.2 | | | 53.41/52.2 | PB | James Allen | U20 | -4 | | Banbury | Corby | 27 May 12 | |
| 771 | 52.2 | | | 48.95 | | Ryan Crawley | U20 | -4 | Mike Corden | City of Sheffield | Doncaster | 16 Jun 12 | |
| 771 | 52.2 | | | 50.04 | | Andy Murray | U23 | -1 | | Kent | Catford | 12 Jul 12 | |
| 52.44 | | | | | | | | | | Tooting Bec | 21 Jul 12 | |
| 771 | 52.2 | | | 50.77 | | George Grainger | U20 | -4 | Trevor Simcox | Crawley | Croydon | 14 Jul 12 | |
| 52.86 | | | | | | | | | | Crawley | 27 Aug 12 | |
| 771 | 52.2 | | | 56.32/52.2 | PB | Jonathan Dennis | U23 | -1 | | Eastbourne | Lewes | 14 Jul 12 | |
| 771 | 52.2 | | | 52.18/49.9 | | Tim Harris | | 10 | Tony Simmons | | Peterborough | 1 Sep 12 | |
| 771 | 52.2 | | | 50.02 | | Alex Currie | U23 | -3 | Callum Orr | Solihull & Small Heath | Yate | 2 Sep 12 | |
| 52.27 | | | | | | | | | | Loughborough | 16 May 12 | |
| 771 | 52.2 | | | 50.64 | | Emmanuel Nanang | U20 | -6 | Steven Surety | Basildon | Abingdon | 15 Sep 12 | |
| 52.60 | | | | | | | | | | Lee Valley | 24 Jun 12 | |
| 784 | 52.21 | i | | 51.89 | | Matthew Campleman | U17 | -7 | Alan Childs | Leeds City | Birmingham | 25 Feb 12 | |
| 52.5 | | | | | | | | | | Spinkhill | 20 May 12 | |
| 52.68 | | | | | | | | | | Stoke | 4 Aug 12 | |
| 784 | 52.21 | | | 49.68 | | Daniel Neal | U17 | -7 | Andy Bibby | Preston | Hull | 15 Jul 12 | |
| 786 | 52.22 | i | | 49.09 | | Nathan Felvus | U23 | -1 | Ivor Adams | Newport H | Cardiff | 19 Feb 12 | |
| 786 | 52.22 | | | 49.31 | | John Saulters | | 11 | | North Down | Antrim | 24 Jun 12 | |
| 788 | 52.23 | | | 52.23 | PB | David Henshaw | | 3 | | Manchester H | Stretford | 5 Jun 12 | |
| 788 | 52.23 | | | 50.70 | | Curtis Mathews | U23 | -3 | Mike Guest | Barry & Vale | Stoke | 4 Aug 12 | |
| 790 | 52.25 | | | 52.25 | PB | George Derisley | | 2 | Sonya Ellis | Exeter Uni | Olympic Park | 5 May 12 | |
| 790 | 52.25 | | | 52.25 | PB | Dominic Williams | U20 | -4 | | Durham | Olympic Park | 5 May 12 | |
| 790 | 52.25 | | | 49.55/49.4 | | Nathan Stevens | | 4 | | Cambridge H | Ashford | 12 May 12 | |
| 790 | 52.25 | | | 51.52 | | Oliver Clarke | U17 | -6 | | Millfield Sch | Yeovil | 13 May 12 | |
| 790 | 52.25 | | | 50.60 | | Greg Williams | U20 | -6 | | Inverclyde | Grangemouth | 4 Jul 12 | |
| 795 | 52.26 | | | 52.26 | PB | Courtney Edwards | U20 | -5 | Ivor Patrick Northey | Herne Hill | Tooting Bec | 15 Aug 12 | |
| 796 | 52.28 | | | 52.28 | PB | Jonathan Davies | U20 | -5 | Everton Caines | Solihull & Small Heath | Birmingham (Un) | 20 Jun 12 | |
| 797 | 52.29 | i | | 52.10/52.0 | | Joe Richardson | U20 | -4 | Christopher Harris | Bexley | Lee Valley | 26 Feb 12 | |
| 52.79 | | | | | | | | | | Ashford | 13 May 12 | |
| 797 | 52.29 | | | 51.84i/50.7 | | Tom Parry | U23 | -3 | Richard Holt | Kingston & Poly | Kingston | 21 Apr 12 | |
| 799 | 52.3 | | | 50.1 | | Rashid Kakoza | U23 | -2 | Julian Golding | Newham & Essex Beagles | Eastbourne | 21 Apr 12 | |
| 799 | 52.3 | | | 50.54 | | Alex Ruggles | U17 | -6 | | Southampton | Bracknell | 6 May 12 | |
| 799 | 52.3 | | | 49.93 | | Billy Crowther | | 4 | | Sheffield Hallam Uni | Perivale | 19 May 12 | |
| 799 | 52.3 | | | 52.64/52.3 | PB | Adam Cowburn | | 1 | | Southampton | Southampton | 19 May 12 | |
| 799 | 52.3 | | | 49.97 | | Mark Collier | U23 | -3 | Matthew Wood | Border | Jarrow | 23 May 12 | |
| 799 | 52.3 | | | 52.02i | | Andrew Scull | U20 | -5 | | Cheltenham | Cheltenham | 4 Jun 12 | |
| 52.36 | i | | | | | | | | | Birmingham | 19 Feb 12 | |
| 799 | 52.3 | | | 51.59/51.1 | | Greg Lott | U23 | -1 | | Aldershot, Farnham & District | Kingston | 9 Jun 12 | |
| 52.34 | | | | | | | | | | Crawley | 8 Apr 12 | |
| 799 | 52.3 | | | 52.3 | PB | Nick Thorn | U20 | -4 | | City of Portsmouth | Portsmouth | 9 Jun 12 | |
| 799 | 52.3 | | | 52.35/52.3 | PB | Anas Nfaou | U20 | -5 | | Shetland | Kirkwall | 17 Jun 12 | |
| 52.35 | | | | | | | | | | Inverness | 12 May 12 | |
| 799 | 52.3 | | | 52.12/51.4 | | Andrew Boyd | | 4 | | Wirral | Ellesmere Port | 1 Jul 12 | |
| 799 | 52.3 | | | 52.3 | PB | Adam Newton | U23 | -3 | | City of Sheffield | Scunthorpe | 5 Aug 12 | |
| 799 | 52.3 | | | 52.17i | | Ben Watt | U17 | -7 | Sandra Woodman | Yate | Derby | 12 Aug 12 | |
| 52.76 | i | | | | | | | | | Birmingham | 11 Feb 12 | |
| 52.77 | | | | | | | | | | Swansea | 22 Jul 12 | |
| 799 | 52.3 | | | 51.3 | | Darrell Elliott | | 4 | Allen Adamson | Bedford & County | St. Albans | 1 Sep 12 | |
| 812 | 52.32 | | | 52.32/52.3 | PB | Alistair Davies | U23 | -3 | | Team Bath | Oxford | 19 May 12 | |
| 812 | 52.32 | | | 52.32 | PB | Jamie Moore | U20 | -4 | Stephen King | Chichester | Bedford | 26 May 12 | |
| 814 | 52.33 | | | 52.13 | | Lee Richards | | 7 | Stuart Pearce | Newport H | Cardiff | 2 Jun 12 | |
| 814 | 52.33 | | | 52.33 | PB | Ryan McIlroy | U17 | -7 | | Ballymena & Antrim | Antrim | 17 Jun 12 | |
| 816 | 52.34 | | | 51.71 | | Rocky Harrison | U20 | -5 | | Yeovil | Yeovil | 31 Mar 12 | |
| 816 | 52.34 | | | 52.34 | PB | Andrew Lomas | U23 | -1 | | Charnwood | Peterborough | 12 May 12 | |
| 816 | 52.34 | | | 52.34/52.3 | PB | Alex Curran | U17 | -6 | David Rice | Herts Phoenix | Bromley | 22 Jul 12 | |
| 816 | 52.34 | | | 50.22/50.0 | | Cameron Webb | U23 | -2 | Paul Keeble | Stevenage & North Herts | Eton | 18 Aug 12 | |
| 820 | 52.35 | | | 50.95 | | George Duggan | U17 | -7 | Peter Brenchley | Tonbridge | Sportcity | 1 Sep 12 | |
| 821 | 52.37 | | | 52.37/51.8 | PB | Tom Burgess | U17 | -7 | Alan Jones | Great Yarmouth | Cambridge | 2 Jun 12 | |
| 822 | 52.38 | | | 49.63 | | Michael Dyer | | 6 | | Reading AC | Watford | 4 Apr 12 | |
| 822 | 52.38 | | | 52.38/51.6 | PB | Jonathan Darby | U23 | -2 | Richard Holt | Kingston & Poly | Derby | 28 Jul 12 | |
| 822 | 52.38 | | | 51.80 | | James Salisbury | U17 | -8 | Andy Bibby | Preston | Sportcity | 2 Sep 12 | |
| 825 | 52.39 | | | 50.29 | | Michael Holden | | 1 | | Kent | Chelmsford | 13 May 12 | |
| 825 | 52.39 | | | 51.33 | | Ian Jones T44 | | 1 | John Dunne | East Cheshire | Stretford | 15 May 12 | |
| 825 | 52.39 | i | | 51.24i | | Allen Farrington | U23 | -3 | | Edinburgh AC | Glasgow | 10 Oct 12 | |
| 828 | 52.4 | | | 51.89/51.6 | | Lewis Golledge | U20 | -4 | | Notts | Nottingham | 13 May 12 | |
| 828 | 52.4 | | | 48.75 | | Adrian Richards | | 4 | Paul Pinnington | Enfield & Haringey | Southampton | 19 May 12 | |
| 52.82 | | | | | | | | | | Woodford | 7 Jul 12 | |
| 828 | 52.4 | | | 52.30/51.9 | | Paul Dickson | U23 | -1 | | Bournemouth | Yeovil | 19 May 12 | |
| 828 | 52.4 | | | 51.49 | | Tom Pontin | U20 | -5 | Sandra Woodman | Yate | Yate | 10 Jun 12 | |
| 52.82 | | | | | | | | | | Yate | 22 Apr 12 | |
| 828 | 52.4 | | | 52.73/52.4 | PB | Stefan Amokwandoh | U17 | -7 | | Blackheath & Bromley | Chelmsford | 30 Jun 12 | |
| 52.73 | | | | | | | | | | Sportcity | 2 Sep 12 | |
| 828 | 52.4 | | | 52.4 | PB | Daniel Stockley | U23 | -3 | | Wigan & District | Wigan | 1 Jul 12 | |
| 828 | 52.4 | | | 52.55i/52.1 | | Nathan Petherick | U17 | -6 | David Pritchard | City of Stoke | Spinkhill | 22 Jul 12 | |
| 828 | 52.4 | | | 50.27 | | Glen Paxman | | 2 | | Harlow AC | Grays | 28 Jul 12 | |
| 828 | 52.4 | | | 52.4 | PB | Andrew Kinney | | 4 | | Worcester | Leamington | 4 Aug 12 | |
| 837 | 52.41 | | | 52.41/52.4 | PB | Lee Wilson | U23 | -3 | Gordon Lockie | Shettleston | Edinburgh | 21 Apr 12 | |
| 837 | 52.41 | | | 52.15 | | Matthew Gain | U17 | -7 | Tony Palman-Brown | Oxford City | Horspath | 5 Sep 12 | |
| 839 | 52.42 | | | 52.06 | | Ben Nelson | U20 | -5 | Dianne Chisholm | Inverness | Inverness | 12 May 12 | |
| 839 | 52.42 | | | 49.63 | | Harry Davies | U17 | -8 | | Bridgend | Cardiff | 2 Jun 12 | |
| 839 | 52.42 | | | 52.42 | PB | Jack Crabtree | U17 | -7 | Neil Canham | Trafford | Stretford | 31 Jul 12 | |
| 842 | 52.43 | | | 52.43/52.4 | PB | Samuel Harry | U20 | -4 | John Scott | Cornwall AC | Exeter | 26 Jun 12 | |
| 843 | 52.44 | | | 51.15 | | Ryan Cooper | U17 | -7 | Helen Patricia James | Cardiff | Cardiff | 2 Jun 12 | |
| 844 | 52.45 | i | | 52.45i | PB | Kaine Walker | U17 | -7 | George Skafidas | Nene Valley | Birmingham | 5 Feb 12 | |
| 844 | 52.45 | | | 51.59 | | Alastair Hay | | 5 | | Central | Grangemouth | 15 Jul 12 | |
| 844 | 52.45 | | | 51.44 | | Ben Everson | U17 | -7 | Neil Canham | Trafford | Stretford | 31 Jul 12 | |
| 847 | 52.47 | i | | 51.59/50.6 | | Isaac Baldwin | U23 | -3 | | Trafford | Glasgow | 4 Feb 12 | |
| 847 | 52.47 | | | 52.47 | PB | Kingsley Annor | U17 | -7 | | Woodford Green Essex Ladies | Hendon | 12 Aug 12 | |
| 847 | 52.47 | | | 48.59 | | Caleb Downes | U17 | -8 | Beverley Simms | Rugby & Northampton | Sportcity | 2 Sep 12 | |
| 850 | 52.48 | i | | 48.65 | | Joe Thornton | U20 | -4 | Cy Knibb | Bristol & West | Sheffield | 25 Feb 12 | |
| 850 | 52.48 | | | 52.29 | | Chris Barlas | | 8 | Mark Pollard | Inverclyde | Edinburgh | 21 Apr 12 | |
| 850 | 52.48 | | | 49.90 | | Alex Babb | | 3 | Chris Zah | Victoria Park & Tower Hamlets | Newham | 27 Jun 12 | |
| 850 | 52.48 | | | 47.59 | | Joel Richardson | U20 | -4 | | Trafford | Stretford | 22 Jul 12 | |
| 854 | 52.49 | i | | 50.76/50.6 | | Leo Rice | U23 | -2 | | Guernsey | Sheffield | 25 Feb 12 | |
| 855 | 52.5 | | | 51.33 | | Leroy Slue | | 9 | Clarence Callender | Harrow | Hornchurch | 1 Apr 12 | |
| 52.69 | | | | | | | | | | Crawley | 8 Apr 12 | |
| 855 | 52.5 | | | 51.61/50.5 | | Steve Horton | | 1 | | Tipton | Tipton | 15 Apr 12 | |
| 855 | 52.5 | | | 51.23 | | Daniel Jackson | U20 | -4 | Philip Hicken | Warrington AC | Canterbury | 1 May 12 | |
| 855 | 52.5 | | | 50.64 | | Michael Downie | U23 | -3 | | Arbroath & District | Edinburgh | 12 May 12 | |
| 855 | 52.5 | | | 52.68/52.4 | | John Jessop | U17 | -7 | | Newark AC | Nottingham | 13 May 12 | |
| 855 | 52.5 | | | 50.11 | | Daniel Gurton | U20 | -5 | Nick Taylor | Vale of Aylesbury | Abingdon | 19 May 12 | |
| 855 | 52.5 | | | 53.06/52.5 | PB | Oliver Kiy | U20 | -6 | | Grantham AC | Cleckheaton | 26 May 12 | |
| 855 | 52.5 | | | 52.5 | PB | Timothy Livingstone | U17 | -6 | Mark Livingstone | Hercules Wimbledon | Croydon | 30 May 12 | |
| 855 | 52.5 | | | 52.56/52.5 | PB | Toby Borthwick | U20 | -6 | Alli Crossman | Guildford & Godalming | Bracknell | 9 Jun 12 | |
| 52.56 | | | | | | | | | | Crawley | 27 Aug 12 | |
| 855 | 52.5 | | | 53.31/51.7 | | Chistian Scales | U17 | -7 | | Shaftesbury Barnet | Hemel Hempstead | 16 Jun 12 | |
| 855 | 52.5 | | | 53.00/52.5 | PB | Jack Cooper | | 2 | Martin Cook | Brighton & Hove | Doncaster | 21 Jun 12 | |
| 855 | 52.5 | | | 51.12/50.9 | | Lloyd Hilton | U23 | -3 | | Macclesfield | Macclesfield | 1 Jul 12 | |
| 52.70 | | | | | | | | | | Oxford | 19 May 12 | |
| 855 | 52.5 | | | 50.50 | | Mark Gilmer | | 9 | | Leeds City | Aldershot | 11 Jul 12 | |
| 868 | 52.51 | | | 52.51 | PB | Fiaz Bapikee | U17 | -6 | | Orion | Chelmsford | 12 May 12 | |
| 869 | 52.52 | i | | 52.52i | PB | Taiwo Kamoju | U17 | -6 | Paul Weston | Croydon | Lee Valley | 15 Jan 12 | |
| 869 | 52.52 | | | 51.96 | | Saoirse Chinery-Edoo | U20 | -4 | Gary Telfer | Harrow | Abingdon | 9 Jun 12 | |
| 871 | 52.54 | | | 52.42 | | Vaughan McPherson | | 2 | | Herne Hill | Crawley | 8 Apr 12 | |
| 871 | 52.54 | | | 49.57 | | Gerald Matthew | U17 | -8 | Jane Dixon | Luton | Watford | 18 Apr 12 | |
| 873 | 52.55 | | | 52.18i | | Cameron Mackie | U20 | -4 | Graham Richmond | Kilmarnock | Grangemouth | 26 Aug 12 | |
| 874 | 52.57 | | | 50.79 | | Callum Brand | U17 | -7 | | Cheltenham | Exeter | 23 Jun 12 | |
| 874 | 52.57 | | | 52.57/52.1 | PB | Billy White | U17 | -8 | | Brighton Phoenix | Crawley | 18 Jul 12 | |
| 876 | 52.58 | | | 49.07 | | Andrew Smith | | 2 | | Swansea | Derby | 27 May 12 | |
| 877 | 52.59 | i | | 51.42i | | John Mulhern | U20 | -4 | Colin Sinclair | Victoria Park City of Glasgow | Glasgow | 4 Feb 12 | |
| 52.7 | | | | | | | | | | Scotstoun | 19 Aug 12 | |
| 877 | 52.59 | | | 52.59 | PB | Alex Nabais | U20 | -5 | | Scunthorpe & District AC (Defunct) | Gateshead | 30 May 12 | |
| 879 | 52.60 | | | 51.34 | | Josh Moss | U23 | -2 | Craig Winrow | Windsor Slough Eton & Hounslow | Lee Valley | 27 May 12 | |
| 879 | 52.60 | | | 52.60 | PB | Jacob Preece | U17 | -6 | Paul Darney | Cardiff | Yate | 24 Jun 12 | |
| 879 | 52.60 | | | 50.72 | | Jacob Burton | U20 | -4 | Darren Hatton | Invicta East Kent | Watford | 30 Jun 12 | |
| 882 | 52.6 | | | 51.95/51.0 | | Jason Jeffery | U23 | -1 | John Clements | Hastings AC | Hastings | 21 Apr 12 | |
| 882 | 52.6 | | | 52.48/51.9 | | Daniel Yellop | | 10 | | Ryston | Colchester | 19 May 12 | |
| 882 | 52.6 | | | 53.00/52.6 | PB | Jamie Robinson | U17 | -7 | | Victoria Park City of Glasgow | Glasgow (S) | 13 Jun 12 | |
| 53.00 | | | | | | | | | | Grangemouth | 25 Aug 12 | |
| 882 | 52.6 | | | 52.6 | PB | Justin White | U17 | -8 | Alan Prescott | Liverpool H | Bebington | 16 Jun 12 | |
| 882 | 52.6 | | | 52.6 | PB | Berwyn Warlow | U20 | -5 | | Pembrokeshire | Carmarthen | 16 Jun 12 | |
| 882 | 52.6 | | | 50.63 | | Alex Morris | U20 | -6 | Glenys Morton | Leicester | Leicester | 16 Jun 12 | |
| 52.76 | | | | | | | | | | Leicester | 14 Jul 12 | |
| 882 | 52.6 | | | 50.48 | | Jack Humphreys | U20 | -4 | Gordon Manning | Radley | Abingdon | 17 Jun 12 | |
| 882 | 52.6 | | | 53.22/52.6 | PB | Laurence Owen | U20 | -4 | Ron Roddan | Thames Valley | Harrow | 24 Jun 12 | |
| 882 | 52.6 | | | 50.9 | | James Hart | | 8 | | Bromsgrove & Redditch | Telford | 1 Jul 12 | |
| 882 | 52.6 | | | 50.13 | | Mark Ward | V40 | 22 | | Rotherham | Cudworth | 5 Aug 12 | |
| 882 | 52.6 | | | 52.6 | PB | Tatenda Manjengwa | U17 | -8 | | Vale of Aylesbury | Luton | 19 Aug 12 | |
| 882 | 52.6 | | | 50.42i | | Daniel Lafferty | U17 | -6 | Stephen Walker | Shettleston | Scotstoun | 19 Aug 12 | |
| 882 | 52.6 | | | 52.03 | | Joe Hawkins | U17 | -7 | Carlo Monticolombi | Invicta East Kent | Canterbury | 1 Sep 12 | |
| 895 | 52.61 | i | | 48.61/48.5 | | Thomas Appleyard | U23 | -3 | | Liverpool H | Sportcity | 16 Dec 12 | |
| 896 | 52.62 | | | 48.91 | | Ben Greenwood | U15 | -9 | Catriona Tavendale | Perth Strathtay | Inverness | 16 Sep 12 | |
| 897 | 52.64 | i | | 52.64i | PB | Ian Mclean-Foreman | U20 | -5 | | Millfield Sch | Birmingham | 25 Feb 12 | |
| 897 | 52.64 | | | 52.64 | PB | Jack Greenwell | U20 | -6 | Philip Gardiner | Gateshead | Shildon | 22 Apr 12 | |
| 897 | 52.64 | | | 52.16/52.0 | | Michael Porter | U20 | -5 | Garry Porter | Colchester & Tendring | Woodford | 23 Jun 12 | |
| 900 | 52.65 | | | 51.80 | | Tyler Bown | U20 | -5 | | Woodford Green Essex Ladies | Eton | 29 Apr 12 | |
| 900 | 52.65 | | | 52.65 | PB | James Berry | U23 | -2 | Sonya Ellis | Exeter | Exeter | 28 Aug 12 | |
| 902 | 52.66 | | | 52.66 | PB | Andrew Smith | U17 | -6 | Aaron Thomas | Pudsey & Bramley | Wakefield | 21 Jul 12 | |
| 903 | 52.67 | | | 51.79 | | Kieran Russ | U17 | -6 | | Daventry | Bedford | 15 Sep 12 | |
| 904 | 52.68 | | | 50.99 | | James Lelliott | U20 | -4 | | Bournemouth | Street | 28 Apr 12 | |
| 904 | 52.68 | | | 51.33 | | Nicholas Hunt | U17 | -6 | Erik Little | Southampton | Exeter | 30 Jun 12 | |
| 904 | 52.68 | | | 52.68/52.0 | PB | Carwyn Evans | U20 | -5 | | Swansea | Derby | 28 Jul 12 | |
| 907 | 52.69 | | | 52.69 | PB | Dale Powell | | 2 | | Enfield & Haringey | Woodford | 17 Jul 12 | |
| 907 | 52.69 | | | 52.42 | | Joshua Barard | U23 | -3 | | City of Stoke | Stoke | 4 Aug 12 | |
| 909 | 52.70 | | | 52.70 | PB | Adam Magowan | U20 | -4 | Robert Mcgaffin | Orchard County | Antrim | 19 May 12 | |
| 909 | 52.70 | | | 52.70 | PB | Alex Grant | U17 | -7 | Paul Bearman | Stratford-upon-Avon | Bedford | 15 Sep 12 | |
| 911 | 52.7 | | | 52.0 | | Chad Lambert | U23 | -2 | Barry Hearn | Marshall Milton Keynes | Welwyn | 6 Apr 12 | |
| 911 | 52.7 | | | 52.71/52.7 | PB | Chris Bennet | U20 | -4 | | Crewe & Nantwich | Wigan | 15 Apr 12 | |
| 911 | 52.7 | | | 53.36/52.7 | PB | Mathew Marchant | | 3 | Michael West | Enfield & Haringey | Lee Valley | 21 Apr 12 | |
| 911 | 52.7 | | | 51.06 | | James Blackburn | U23 | -2 | Adrian Webb | Liverpool H | Liverpool | 22 Apr 12 | |
| 911 | 52.7 | | | 51.27 | | James Wright | U20 | -5 | Jerzy Maciukiewicz | Rugby & Northampton | Stoke | 5 May 12 | |
| 911 | 52.7 | | | 49.80/49.7 | | Daniel Pearce | U23 | -2 | Laurence Garnham | Newquay & Par | Carn Brea | 12 May 12 | |
| 52.90 | | | | | | | | | | Exeter | 8 Jul 12 | |
| 911 | 52.7 | | | 51.62 | | Lewis Hunter | U20 | -6 | Eric Simpson | Pitreavie | Edinburgh | 12 May 12 | |
| 52.86 | i | | | | | | | | | Glasgow | 9 Feb 12 | |
| 52.91 | | | | | | | | | | Grangemouth | 2 May 12 | |
| 911 | 52.7 | | | 51.75/51.5 | | Ryan Skipp | U20 | -5 | | Thetford | Norwich | 12 May 12 | |
| 911 | 52.7 | | | 52.98i/52.6 | | Kyran Roberts | U17 | -6 | Delyth Brown | Carmarthen | Neath | 13 May 12 | |
| 52.98 | i | | | | | | | | | Cardiff | 8 Jan 12 | |
| 911 | 52.7 | | | 51.85/51.7 | | Vladimir Woodham-Smith | U20 | -5 | | Belgrave | Battersea Park | 16 May 12 | |
| 911 | 52.7 | | | 50.25 | | Ben Akin | U20 | -4 | Andy Bibby | Preston | Hull | 26 May 12 | |
| 911 | 52.7 | | | 52.7 | PB | Ryan Davies | U23 | -2 | | Aldershot, Farnham & District | Kingston | 9 Jun 12 | |
| 911 | 52.7 | | | 47.70 | | Jordan Layne | U17 | -7 | Paul Nash | Wycombe | Parliament Hill | 9 Jun 12 | |
| 911 | 52.7 | | | 51.75 | | Andy Wiles | | 2 | David Lowes | New Marske | Hexham | 30 Jun 12 | |
| 911 | 52.7 | | | 51.04/50.7 | | Ashleigh Naylor | | 1 | | Gloucester | Stoke Gifford | 1 Jul 12 | |
| 911 | 52.7 | | | 51.69/50.8 | | Nick Armstrong | U17 | -7 | Jon Armstrong | Bexley | Croydon | 22 Jul 12 | |
| 911 | 52.7 | | | 51.78 | | Tom Meakin | | 6 | | Owls Leicester | Kettering | 19 Aug 12 | |
| 911 | 52.7 | | | 50.79 | | Daniel Green | U23 | -2 | | Ipswich | Leeds | 3 Oct 12 | |
| 929 | 52.72 | | | 52.72/52.5 | PB | Daniel Brock | U20 | -5 | Adrian Brown | Reading AC | Watford | 4 Apr 12 | |
| 929 | 52.72 | | | 52.72 | PB | Adam Varuel | U20 | -4 | | Unattached | Watford | 18 Apr 12 | |
| 929 | 52.72 | | | 51.33 | | Joe Yarde | U20 | -5 | Marina Armstrong | Croydon | Kingston | 21 Apr 12 | |
| 929 | 52.72 | | | 52.72 | PB | Callum Hunter | U20 | -5 | | North Down | Antrim | 24 Jun 12 | |
| 933 | 52.73 | | | 52.73 | PB | Adam Tofield | | 3 | | Tavistock | Street | 27 May 12 | |
| 933 | 52.73 | | | 52.21 | | Luke Harreld | | 4 | David Cole | Bury | Stretford | 31 Jul 12 | |
| 935 | 52.74 | | | 50.83/50.4 | | Paul Clarke | | 10 | Steve Perks | Carmarthen | Inverness | 30 May 12 | |
| 936 | 52.75 | i | | 52.75i/52.4 | PB | Johnoi Josephs | U20 | -6 | Marina Armstrong | Sutton & District | Lee Valley | 15 Jan 12 | |
| 936 | 52.75 | | | 51.02 | | Jonathan Tilt | V50 | 28 | Howard Moscrop | Southampton | Zittau, GER | 21 Aug 12 | |
| 936 | 52.75 | | | 51.70i | | David Agnew | | 12 | | Pitreavie | Livingston | 22 Aug 12 | |
| 939 | 52.76 | | | 52.76 | PB | Pierre Walker | | 2 | Michael Comissiong | Belgrave | Woodford | 17 Jul 12 | |
| 939 | 52.76 | | | 50.54/50.5 | | Zach Bryson | U20 | -4 | | Whitemoss | Wishaw | 19 Aug 12 | |
| 941 | 52.77 | | | 52.38 | | Lewis Lloyd | U20 | -5 | | Herne Hill | Battersea Park | 4 Jul 12 | |
| 942 | 52.79 | | | 52.79/52.3 | PB | Colin Garrett | | 11 | | Ayr Seaforth | Inverness | 30 May 12 | |
| 943 | 52.80 | i | | 50.81 | | Shane Adams | U23 | -3 | | Leeds Uni | Birmingham | 19 Feb 12 | |
| 943 | 52.80 | i | | 52.80i | PB | Shaun Thompson | U23 | -2 | | Irvine | Glasgow | 19 Feb 12 | |
| 943 | 52.80 | | | 52.19 | | Tom Phillips | U23 | -3 | Helen Patricia James | Cardiff | Cardiff | 25 Aug 12 | |
| 946 | 52.8 | | | 52.8 | PB | Takeshi Mayakawa | | | | Leeds Uni | Warrington | 1 Apr 12 | |
| 946 | 52.8 | | | 51.53/51.5 | | Bradley Szakacs | U20 | -4 | Karen Williams | Oldham & Royton | Salford | 5 May 12 | |
| 946 | 52.8 | | | 55.40/52.8 | PB | Craig Grieve | U23 | -3 | | Tweed, Leader, Jed Track | Edinburgh | 12 May 12 | |
| 946 | 52.8 | | | 48.20 | | Sam Plumb | U20 | -5 | Nick Dakin | Newbury | Bedford (Match 2) | 19 May 12 | |
| 52.92 | | | | | | | | | | Woking | 1 Aug 12 | |
| 946 | 52.8 | | | 53.71/52.8 | PB | Chris Hawkins | U20 | -4 | | Enfield & Haringey | Cheltenham | 4 Jun 12 | |
| 946 | 52.8 | | | 53.21/52.8 | PB | Miles Hardie | U17 | -7 | Steven Surety | Basildon | Basildon | 10 Jun 12 | |
| 946 | 52.8 | | | 50.63 | | Anthony Hogg | U17 | -7 | Alicia Berry | Jarrow & Hebburn | Jarrow | 30 Jun 12 | |
| 946 | 52.8 | | | 53.59/52.8 | PB | Matthew Nicholson | U20 | -5 | Simon Goodwin | Bedford & County | Woking | 30 Jun 12 | |
| 946 | 52.8 | | | 52.89/52.8 | PB | Josh Burrows | U17 | -6 | | Telford AC | Leicester | 14 Jul 12 | |
| 52.89 | | | | | | | | | | Leicester | 14 Jul 12 | |
| 946 | 52.8 | | | 52.42i | | Gordon Wilson | U17 | -6 | | Irvine | Kilmarnock | 5 Aug 12 | |
| 52.81 | | | | | | | | | | Grangemouth | 17 Jun 12 | |
| 946 | 52.8 | i | | 52.88/50.3 | | Simeon Balson Jones | U23 | -3 | | Ilford | Lee Valley | 5 Dec 12 | |
| 957 | 52.81 | i | | 52.17 | | Adam McCarthy | U23 | -2 | | Havering | Cardiff | 8 Jan 12 | |
| 957 | 52.81 | | | 50.43 | | Roger Skedd | | 8 | Greg Richards | City of Sheffield | Arles, FRA | 7 Apr 12 | |
| 959 | 52.82 | | | 50.15 | | Lamiko Thomas | U17 | -7 | Vicente Modahl | Sale Harriers Manchester | Stretford | 16 Jun 12 | |
| 959 | 52.82 | | | 48.12 | | Samuel Day | U15 | -8 | | Middlesbrough (Mandale) | Gateshead | 6 Jul 12 | |
| 959 | 52.82 | | | 52.82 | PB | Ben Daggett | U20 | -6 | | Harrogate | Stretford | 17 Jul 12 | |
| 962 | 52.83 | | | 52.83/52.6i | PB | Ian Allocca | | | | Portsmouth Uni | Tooting Bec | 14 Apr 12 | |
| 962 | 52.83 | | | 50.46/50.2 | | Will Steel | | 2 | | City of York | Cudworth | 12 May 12 | |
| 964 | 52.84 | | | 52.46/51.3 | | Christopher Sinclair | | 6 | | Charnwood | Birmingham | 2 Jun 12 | |
| 964 | 52.84 | | | 52.84/51.8 | PB | James Hilton | U15 | -8 | Keith Bullock | Derby | Gateshead | 6 Jul 12 | |
| 966 | 52.85 | i | | 51.85 | | Andrew Ferguson Jnr | U23 | -1 | Joyce Hogg | Banchory Stonehaven | Glasgow | 21 Jan 12 | |
| 966 | 52.85 | | | 52.85 | PB | Stew Gault | U20 | -6 | | Ballymena & Antrim | Antrim | 19 May 12 | |
| 966 | 52.85 | | | 50.74/50.0 | | Martin Aspley-Davis | V35 | 13 | Robert Hingley | Bromsgrove & Redditch | Derby | 21 Jul 12 | |
| 969 | 52.86 | i | | 52.86i | PB | Tim Nwachukwu | | 7 | | Barnet | Lee Valley | 28 Jan 12 | |
| 970 | 52.88 | | | 51.44 | | Stephen Parker | | 10 | Richard Holt | Epsom & Ewell | Tonbridge | 9 Jun 12 | |
| 971 | 52.89 | i | | 51.22i | | Luke Morbey | U20 | -5 | Anthony Pitt | Birchfield H | Birmingham | 12 Feb 12 | |
| 972 | 52.9 | | | 52.39i | | Jamie Gemmell | U20 | -6 | Iain McEwan | Whitemoss | East Kilbride | 29 Apr 12 | |
| 972 | 52.9 | | | 56.08/52.9 | PB | Ornette Matthews | U17 | -6 | Anthony Mayhew | Herne Hill | Lee Valley | 6 May 12 | |
| 972 | 52.9 | | | 53.24/52.9 | PB | Tom Charteress | U17 | -7 | Steve McGowan | Rugby & Northampton | Corby | 13 May 12 | |
| 972 | 52.9 | | | 49.95 | | Tom McKellar | U23 | -3 | | Basingstoke & Mid Hants | Portsmouth | 19 May 12 | |
| 972 | 52.9 | | | 52.12/52.1 | | Chris Lamb | | 6 | Glynn Tromans | Rugby & Northampton | Corby | 22 May 12 | |
| 972 | 52.9 | | | 52.93/52.9 | PB | Louis Ofoluwa | U17 | -7 | Don Lennon | Hyndburn | Blackburn | 2 Jun 12 | |
| 52.93 | | | | | | | | | | Bedford | 18 Aug 12 | |
| 972 | 52.9 | | | 49.50 | | Ciaran Cooper | U17 | -8 | Bryan Clinton | Swindon | Salisbury | 16 Jun 12 | |
| 972 | 52.9 | | | 52.9 | PB | Thomas Ridding | U17 | -7 | Paul Hayes | Coventry | Coventry | 17 Jun 12 | |
| 972 | 52.9 | | | 55.36/52.5 | | Nick Hardy | U23 | -3 | Aaron Thomas | Birchfield H | York | 23 Jun 12 | |
| 972 | 52.9 | | | 54.21/52.9 | PB | Callum Biddle | U20 | -6 | | Reading AC | Harrow | 24 Jun 12 | |
| 972 | 52.9 | | | 47.29 | | Robert Shipley | U17 | -7 | | Selby | Jarrow | 30 Jun 12 | |
| 52.92 | | | | | | | | | | Wakefield | 21 Jul 12 | |
| 972 | 52.9 | | | 51.66/51.4 | | Adam Herring | U17 | -7 | Clive Poyner | City of Norwich | Bedford | 8 Jul 12 | |
| 972 | 52.9 | | | 51.40 | | Thomas Kearns | U20 | -4 | Max Coleby | Luton | Peterborough | 1 Sep 12 | |
| 972 | 52.9 | | | 52.33 | | Graeme Tinkler | U17 | -6 | | Newton Abbot | Par | 8 Sep 12 | |
| 52.99 | | | | | | | | | | Exeter | 27 May 12 | |
| 986 | 52.91 | | | 51.41 | | Alan Montgomery | U20 | -4 | Bryan McCorkell | Lagan Valley | Bangor | 26 May 12 | |
| 986 | 52.91 | | | 51.19/50.5 | | Kobefo Ntabejane | U17 | -6 | | Sale Harriers Manchester | Sportcity | 2 Sep 12 | |
| 988 | 52.92 | | | 52.92 | PB | Omar Dixon | U23 | -1 | Jason Carty | Croydon | Crawley | 8 Apr 12 | |
| 988 | 52.92 | | | 50.39 | | Dereece Green | U20 | -6 | | Windsor Slough Eton & Hounslow | Watford | 16 May 12 | |
| 988 | 52.92 | | | 52.92 | PB | Harry Ramsey | U17 | -6 | | Dorking & Mole Valley | Tonbridge | 12 Jun 12 | |
| 991 | 52.93 | i | | 52.65/51.2 | | Steven Callister | | 3 | Stephen Ball | Trafford | Birmingham | 19 Feb 12 | |
| 992 | 52.95 | | | 51.74/51.6 | | Kylon Collins | | 4 | | Victoria Park & Tower Hamlets | Mile End | 12 May 12 | |
| 992 | 52.95 | | | 52.95 | PB | Daniel Pitman | U17 | -6 | Michael Baker | Medway & Maidstone | Eltham | 23 May 12 | |
| 992 | 52.95 | | | 52.95 | PB | Ben McEwan | U20 | -5 | Ivor Adams | Newport H | Cardiff | 25 Aug 12 | |
| 992 | 52.95 | | | 52.95 | PB | Jordan Chapman | U17 | -7 | Ken Hogg | Aberdeen | Inverness | 16 Sep 12 | |
| 996 | 52.96 | i | | 52.47/51.9 | | Gary McBride | U23 | -2 | | Shettleston | Glasgow | 21 Jan 12 | |
| 997 | 52.97 | i | | 52.97i | PB | Remello Edwards | U17 | -6 | Vicente Modahl | Sale Harriers Manchester | Sheffield | 14 Jan 12 | |
| 997 | 52.97 | | | 52.97/52.6 | PB | Edward Lantzos | U23 | -2 | Elwyn Jarrett | Newport H | Wakefield | 7 Apr 12 | |
| 997 | 52.97 | | | 49.10 | | Ryan James | U15 | -8 | Helen Patricia James | Cardiff | Yate | 2 Sep 12 | |
| 1000 | 52.99 | | | 50.18 | | Craig Baker | | 5 | | Worthing | Woodford | 21 Apr 12 | |
| 1000 | 52.99 | | | 52.99 | PB | George Wood | U17 | -7 | Brian MacKenzie | Chelmsford | Chelmsford | 12 May 12 | |
| 1000 | 52.99 | | | 51.98 | | Greg Richards | V35 | 15 | Matthew Hargreaves | Tamworth | Inverness | 30 May 12 | |
| 1000 | 52.99 | | | 51.04 | | Fraser White | U17 | -7 | David Hood | Edinburgh AC | Grangemouth | 8 Jun 12 | |
| 1004 | 53.00 | | | 53.00 | PB | Daniel Owen | U20 | -4 | Andrew Beadle | Cheltenham | Aberdare | 24 Jun 12 | |
| 1005 | 53.0 | | | 52.4 | | Adam Stainsby | | 1 | Jon Bigg | Worthing | Ashford | 21 Apr 12 | |
| 1005 | 53.0 | | | 53.01/52.4 | | Karl Murray | U20 | -4 | Christiane Claire Adams | Richmond & Zetland | Middlesbrough | 24 Apr 12 | |
| 1005 | 53.0 | | | 52.32/50.4 | | Scott Ware | V35 | 16 | | Met Police | Bedford | 5 May 12 | |
| 1005 | 53.0 | | | 54.27i/53.0 | PB | Joshua Scibetta | U17 | -6 | | Newcastle (Staffs) AC | Stoke | 12 May 12 | |
| 1005 | 53.0 | | | 50.94 | | Charles Britten | | 3 | Lee Ness | Kettering | Poole | 19 May 12 | |
| 1005 | 53.0 | | | 50.95 | | Abraham Newell | | 1 | | Southampton | Southampton | 19 May 12 | |
| 1005 | 53.0 | | | 51.26 | | Chris Parr | | 6 | Craig Winrow | Gateshead | Jarrow | 23 May 12 | |
| 1005 | 53.0 | | | 52.48/51.7 | | Marvin Edwards | | 10 | | Bury | Clayon-le-Moor | 26 May 12 | |
| 1005 | 53.0 | | | 53.26/53.0 | PB | Edward O'Hara | U20 | -4 | | Radley | Oxford | 6 Jun 12 | |
| 1005 | 53.0 | | | 53.0 | PB | Joe Miller | U17 | -6 | | Warwickshire Schs | Leamington Spa | 16 Jun 12 | |
| 1005 | 53.0 | | | 53.82/52.2 | | MacAuley Snutch | U17 | -8 | George Cooper | City of Stoke | Coventry | 17 Jun 12 | |
| 1005 | 53.0 | | | 53.0 | PB | Marvin Popoola | U17 | -6 | Les Johnson | Herne Hill | Harrow | 17 Jun 12 | |
| 1005 | 53.0 | | | 53.49/52.5 | | Daniel Tuttle | U20 | -4 | Andy Tuttle | Newbury | Hastings | 30 Jun 12 | |
| 1005 | 53.0 | | | 51.94/51.9 | | Ryan Spivey | U17 | -6 | | East Grinstead | Watford | 30 Jun 12 | |
| 1005 | 53.0 | | | 51.40i | | Rhys Lloyd | U17 | -7 | Andrew Beadle | Cheltenham | Stoke Gifford | 1 Jul 12 | |
| 1005 | 53.0 | | | 53.41i/53.0 | PB | Harry Young | U17 | -7 | Bill Boyd | Corby | Leicester | 14 Jul 12 | |
| 1005 | 53.0 | | | 51.89 | | Jethro McGraw | U15 | -8 | Jim Feeney | Amber Valley & Erewash | Banbury | 21 Jul 12 | |
| 1005 | 53.0 | | | 54.23/53.0 | PB | Ben Pearson | U20 | -6 | Eldon Lake | Reading AC | Reading | 22 Jul 12 | |
| 1005 | 53.0 | | | 52.7 | | Jamaine Coleman | U17 | -6 | Andy Bibby | Preston | Wigan | 29 Jul 12 | |
| 1005 | 53.0 | | | 52.1 | | Dylan Love | U17 | -6 | Mark Baddeley | Lincoln Wellington | Grantham | 2 Sep 12 | |
| 1005 | 53.0 | | | 54.68/52.1 | | Fraser McCall | U17 | -8 | | Chelmsford | Stevenage | 16 Sep 12 | |
| 1005 | 53.0 | | | 53.03/52.4 | | Alex Lubbock | U20 | -6 | | City of Norwich | Bury St Edmunds | 23 Sep 12 | |
| 1005 | 53.0 | i | | 53.0i | PB | Reece Prescod | U20 | -7 | Edwin Stevens | Enfield & Haringey | Lee Valley | 5 Dec 12 | |
| 46.05 | | | 46.01 | | Erison Hurtault | | 6 | | Newham & Essex Beagles | Olympic Park | 4 Aug 12 | |
| 47.10 | | | 46.20 | | Richard Morrissey | U23 | -2 | Chris Zah | Havering | Azusa CA, USA | 20 Apr 12 | |
| 47.60 | | | 45.58 | | Paul McKee | | 13 | | Liverpool H | Dublin (S), IRL | 20 Jun 12 | |
| 47.73 | | | 45.14 | | Victor-Ricardo Dos Santos Soares | U20 | -5 | Clarence Callender | Thames Valley | Lee Valley | 27 May 12 | |
| 48.13 | | | 47.15 | | Jason Harvey | U23 | -2 | | Liverpool H | Dublin (S), IRL | 20 Jun 12 | |
| 48.16 | | | 47.10 | | Tonderai Tomu | | 2 | | Stevenage & North Herts | Tampa FL, USA | 5 May 12 | |
| 48.47 | | | 48.47 | PB | Andrew Boudrie | | 5 | | Belgrave | Birmingham | 2 Jun 12 | |
| 48.56 | | | 48.56 | PB | Willem Coertzen | | 8 | Greg Richards | Shaftesbury Barnet | Olympic Park | 8 Aug 12 | |
| 48.60 | i | | 48.60i | PB | Matthias Bos | | 5 | Lorna Boothe | Shaftesbury Barnet | Lee Valley | 8 Jan 12 | |
| 48.93 | | | | | | | | | | Newham | 23 May 12 | |
| 49.9 | | | | | | | | | | Kingston | 13 May 12 | |
| 48.78 | | | 46.96 | | Lloyd Zvasiya | | 9 | | Birchfield H | Birmingham (Un) | 20 Jun 12 | |
| 48.80 | | | 45.98 | | Musa Audu | | 10 | Kay Reynolds | Woodford Green Essex Ladies | Loughborough | 13 Jun 12 | |
| 48.8 | | | 48.81/48.8 | PB | Omar Grant | U20 | -5 | Barrington King | Harrow | Hendon | 28 Jul 12 | |
| 48.81 | | | | | | | | | | Milton Keynes | 1 Sep 12 | |
| 48.87 | | | 47.27 | | Curtis Woods | U23 | -3 | | Liverpool H | Dublin (S), IRL | 20 May 12 | |
| 48.92 | i | | 48.25i | | Paul Scanlan | U20 | -4 | Simon Duberley | Woodford Green Essex Ladies | Birmingham | 25 Feb 12 | |
| 49.29 | | | | | | | | | | Crystal Palace | 8 Jul 12 | |
| 49.10 | | | 47.33 | | Ben Maze | U23 | -2 | | Lagan Valley | Dublin (S), IRL | 25 Jul 12 | |
| 49.15 | | | 48.76 | | Eldridge Phiri | | 7 | Callum Orr | Tamworth | Loughborough | 13 Jun 12 | |
| 49.62 | | | 49.62 | PB | Ingmar Vos | | 4 | | Birchfield H | Olympic Park | 8 Aug 12 | |
| 49.67 | | | 48.37 | | David Olusile | | 6 | Kay Reynolds | Radley | Loughborough | 16 May 12 | |
| 49.74 | | | 49.74 | PB | Ciaran Collins | | 2 | | Belgrave | Lee Valley | 27 May 12 | |
| 49.75 | i | | 49.18 | | Kevin Kimuana | | 1 | | Abingdon | Sheffield | 25 Feb 12 | |
| 49.85 | | | 49.85 | PB | Jonathan Browning | U20 | -4 | Melanie Browning | Ballymena & Antrim | Tullamore, IRL | 2 Jun 12 | |
| 50.08 | | | 48.43 | | Femi Owolade | | 1 | | Blackheath & Bromley | Tooting Bec | 14 Apr 12 | |
| 50.32 | i | | 48.02 | | Billy Ryan | U23 | -1 | George Gandy | Newham & Essex Beagles | Birmingham | 4 Feb 12 | |
| 50.4 | | | 48.84 | | Demetric Nelson | U20 | -5 | Keith Daniel | Bingley | Cleckheaton | 1 Apr 12 | |
| 50.78 | | | 49.51 | | Tom Carey | | 6 | Tim Needham | Shaftesbury Barnet | Peterborough | 12 May 12 | |
| 50.78 | | | 50.05/49.8 | | Theodore Zake | U17 | -8 | Joseph McDonnell ☘️ | Charnwood | Gateshead | 6 Jul 12 | |
| 50.9 | | | 49.34 | | Louis Rawlings | U17 | -7 | | Cambridge & Coleridge | Cambridge | 27 May 12 | |
| 51.6 | | | 49.75 | | Andrew Ajube | U23 | -3 | Chris Zah | Victoria Park & Tower Hamlets | Braintree | 19 May 12 | |
| 51.90 | | | | | | | | | | Woodford | 11 Sep 12 | |
| 51.74 | | | 51.74/51.3 | PB | Jonathan Mann | U23 | -3 | Ron Roddan | Aberdeen | Grangemouth | 15 Jul 12 | |
| 51.83 | | | 50.03 | | Louis William | | 6 | | Thames Valley | Hendon | 25 Aug 12 | |
| 52.02 | | | 49.94 | | Christian Von Eitzen | U17 | -8 | Harry Czapski | Vale of Aylesbury | Abingdon | 26 May 12 | |
| 52.18 | | | 50.83 | | Spartak Ljashenko | | 2 | | Loughborough Students | Bedford | 26 May 12 | |
| 52.2 | | | 53.54/52.2 | PB | Joost Rietveld | | 7 | Chris Zah | Victoria Park & Tower Hamlets | Braintree | 19 May 12 | |
| 52.21 | | | 50.00 | | Kaspars Kazemaks | | 6 | Nick Phipps | Woking | Carshalton | 8 Sep 12 | |
| 52.4 | | | 49.47 | | Frano Vainio-Doiseul | U17 | -7 | Mark Lancaster | Cambridge H | Eltham | 8 Sep 12 | |
| 52.52 | | | | | | | | | | Eltham | 23 May 12 | |
| 52.47 | | | 51.79 | | Jegor Mljavov | U23 | -2 | Andy Young | Glasgow Uni | Grangemouth | 14 Apr 12 | |
| 52.6 | | | 51.57 | | Andrejs Safars | | 6 | Chris Newman | Medway & Maidstone | Erith (Match 1) | 9 Jun 12 | |
| 52.62 | | | 52.62 | PB | Loic Malroux | | 5 | Richard Holt | Kingston & Poly | Serrahima, ESP | 5 May 12 | |
| 52.7 | | | 51.2 | | Tommy Carroll | | 1 | Mick Woods | City of Norwich | Chelmsford | 9 Jun 12 | |
| 52.7 | i | | 52.82i/52.7i | PB | Lukas Ryffel | U23 | -3 | Ron Roddan | Thames Valley | Lee Valley | 5 Dec 12 | |
| 52.71 | i | | 52.71i | PB | Kevin Wilson | U23 | -1 | Geoff Tyler | Chelmsford | Lee Valley | 28 Jan 12 | |
| 52.9 | | | 52.9 | PB | Bruno Lavisse | U23 | -1 | | Chelmsford | Colchester | 1 Jul 12 | |