| 300 U15 Women 2018 to 47.0 | Head to Head Top 10 |
| Rank | Perf | | | PB | | Name | | Year | Coach | Club | Venue | Date | |
| 1 | 39.20 | | | 39.20 | PB | Jeslyn Agyei-Kyem | | 2 | Andrew Kennard | Walton | Birmingham | 14 Jul 18 |  |
| 2 | 39.69 | | | 39.69 | PB | Poppy Malik | | 2 | Grant Barker | Notts | Birmingham | 14 Jul 18 | |
| 3 | 39.76 | | | 39.31i | | Ashley Nemits | | 2 | Trevor Painter | Warrington AC | Birmingham | 14 Jul 18 | |
| 4 | 40.25 | | | 39.38 | | Nandy Kihuyu | | 1 | Veronica Boden | Hallamshire | Birmingham | 14 Jul 18 | |
| 5 | 40.6 | | | 40.51 | | Natalie Groves | | 2 | Stuart Hall | Spenborough | Leeds (BP) | 9 Jun 18 | |
| 41.03 | | | | | | | | | | Birmingham | 13 Jul 18 | |
| 6 | 40.61 | | | 40.61 | PB | Isabelle Bloem | | 2 | | Halifax | Birmingham | 14 Jul 18 | |
| 7 | 40.9 | | | 40.19i | | Mia Morrisroe | | 2 | Stephen Carroll | Liverpool H | Bebington | 9 Jun 18 | |
| 41.21 | | | | | | | | | | Sheffield | 17 Jun 18 | |
| 8 | 40.95 | | | 40.95 | PB | Emily Bowart | | 2 | Iain Presnell | Tonbridge | Ashford | 9 Jun 18 | |
| 9 | 40.98 | | | 40.25 | | Imogen Pughe | | 1 | | West Cheshire | Birmingham | 13 Jul 18 | |
| 10 | 40.99 | | | 40.53/40.5 | | Isabelle Skelton | | 2 | Bill Boyd | Sutton-in-Ashfield | Birmingham | 13 Jul 18 | |
 UK 10 TARGET: 41.00 |
| 11 | 41.04 | | | 41.04 | PB | Shakanya Osahon | | 2 | Jay Galley | Blackheath & Bromley | Reading | 17 Jun 18 | |
| 12 | 41.12 | | | 40.75 | | Ella Wintle | | 1 | | Pembrokeshire | Cardiff | 14 Jul 18 | |
| 13 | 41.18 | | | 40.35 | | Alyson Bell | | 2 | | Giffnock North | Grangemouth | 20 May 18 | |
| 14 | 41.2 | | | 42.20/41.2 | PB | Zakia Mossi | | 2 | Phillip Kissi | Blackheath & Bromley | Hornchurch | 21 Jul 18 | |
| 42.20 | | | | | | | | | | Reading | 17 Jun 18 | |
| 15 | 41.3 | | | 40.06 | | Elizabeth Taylor | | 2 | Ronald Crosby | Peterborough | Peterborough | 3 Jun 18 | |
| 41.80 | | | | | | | | | | Birmingham | 13 Jul 18 | |
| 15 | 41.3 | | | 41.3 | PB | Amelia Verney | | 2 | Zac Kerin | Bournemouth | Bournemouth | 8 Jul 18 | |
| 17 | 41.33 | | | 39.23 | | Emily Newnham | | 2 | Nick Dakin | Medway Phoenix | Woodford | 21 Jul 18 | |
| 18 | 41.37 | i | | 41.37i | PB | Ella Rush | | 2 | David Feeney | Amber Valley & Erewash | Sheffield | 24 Feb 18 | |
| 41.74 | | | | | | | | | | Loughborough | 30 May 18 | |
| 42.8 | | | | | | | | | | Telford | 5 May 18 | |
| 19 | 41.4 | | | 40.80i | | Sophie Walton | | 2 | Trevor Williams | Horwich | Blackburn | 17 Jun 18 | |
| 19 | 41.4 | | | 41.29 | | Laure Kidukula | | 2 | Vicente Modahl | Sale Harriers Manchester | Bebington | 21 Jul 18 | |
| 41.59 | | | | | | | | | | Wakefield | 19 May 18 | |
| 21 | 41.43 | | | 40.60 | | Isabel Pinder | | 2 | Rod Finch | Basingstoke & Mid Hants | Basingstoke | 9 Jun 18 | |
| 22 | 41.48 | | | 41.48 | PB | Fatoumatta Bojang | | 1 | Jonathan Moss | West Cheshire | Wakefield | 19 May 18 | |
| 23 | 41.49 | | | 40.81 | | Layla Zuill | | 2 | Steven Doig | Fife | Scotstoun | 30 May 18 | |
| 24 | 41.5 | | | 39.63 | | Emilia Rock | | 1 | Nick Taylor | Vale of Aylesbury | Mile End | 19 May 18 | |
| 41.70 | | | | | | | | | | Birmingham | 13 Jul 18 | |
| 25 | 41.6 | | | 39.48 | | Neave McGhee | | 2 | | Liverpool H | Middlesbrough | 21 Jul 18 | |
| 41.94 | | | | | | | | | | Sheffield | 17 Jun 18 | |
| 26 | 41.61 | | | 41.61 | PB | Alice Brown | | 2 | Patrick Gahagan | Havering | Bromley | 19 May 18 | |
| 27 | 41.71 | | | 40.80 | | Keira Rose | | 2 | Iain Presnell | Medway & Maidstone | Ashford | 9 Jun 18 | |
| 27 | 41.71 | | | 41.25 | | Ava Taperell | | 2 | Kevin Flannery | Gateshead | Sheffield | 17 Jun 18 | |
| 29 | 41.75 | | | 41.75 | PB | Zahara Malcolm | | 1 | John Stow | Woodford Green Essex Ladies | Chelmsford | 9 Jun 18 | |
| 30 | 41.77 | | | 39.65 | | Sophie Wallwork | | 1 | Eric Simpson | Pitreavie | Aberdeen | 19 Aug 18 | |
| 31 | 41.8 | | | 42.14/41.8 | PB | Maddison Sawyer | | 2 | Mike Botha | Invicta East Kent | Ashford | 8 Jul 18 | |
| 32 | 41.82 | | | 40.40 | | Lucy Fellows | | 1 | | St. Mary's Richmond | Bedford | 21 Apr 18 | |
| 33 | 41.84 | | | 41.84 | PB | Imogen Lewis | | 2 | Linda Nicholson | Lasswade | Meadowmill | 26 Jun 18 | |
| 34 | 41.9 | | | 42.49/41.9 | PB | Alicja Gawronski | | 2 | | Nene Valley | Peterborough | 9 Jun 18 | |
| 42.49 | | | | | | | | | | Birmingham | 13 Jul 18 | |
| 35 | 41.91 | | | 38.81i | | Rebecca Grieve | | 1 | Francis Smith | Pitreavie | Aberdeen | 19 Aug 18 | |
| 36 | 41.99 | | | 41.99 | PB | Amy Battle | | 2 | Joe Frost | Stockport | Liverpool | 19 May 18 | |
| 37 | 42.00 | | | 42.00/41.3 | PB | Ayomide Cole | | 1 | | Basingstoke & Mid Hants | Bracknell | 3 Jun 18 | |
| 37 | 42.00 | | | 42.00 | PB | Antonia Dawes | | 2 | Darryn McAtee | Newport H | Cardiff | 14 Jul 18 | |
| 39 | 42.0 | | | 41.34 | | Teniola Fajuke | | 1 | Alf Vickers | Victoria Park & Tower Hamlets | Mile End | 19 May 18 | |
| 42.27 | | | | | | | | | | Lee Valley | 12 Aug 18 | |
| 39 | 42.0 | | | 43.24/42.0 | PB | Meg Willis | | 2 | David Pring | City of Norwich | Peterborough | 3 Jun 18 | |
| 43.24 | | | | | | | | | | Lee Valley | 11 Aug 18 | |
| 39 | 42.0 | | | 41.55/41.5 | | Ella Fryer | | 2 | | St. Mary's Richmond | Tooting Bec | 30 Jun 18 | |
| 42.11 | | | | | | | | | | Woking | 2 Sep 18 | |
| 42 | 42.05 | | | 41.03 | | Isabel White | | 1 | Lee Walker | Longwood | Cudworth | 12 May 18 | |
| 43 | 42.07 | | | 42.07 | PB | Hannah Burn | | 2 | | Kilmarnock | Kilmarnock | 20 May 18 | |
| 43 | 42.07 | | | 42.07 | PB | Alana Lea | | 2 | Gwyn Jones | Cardiff | Cardiff | 14 Jul 18 | |
| 45 | 42.1 | | | 42.14/42.1 | PB | Cleo Tomlinson | | 2 | Stephen King | Horsham Blue Star | Horsham | 19 May 18 | |
| 42.14 | | | | | | | | | | Crawley | 12 May 18 | |
| 45 | 42.1 | | | 42.12/42.1 | PB | Laura Anene | | 1 | Daniel Hooker | Hillingdon | Mile End | 19 May 18 | |
| 42.56 | | | | | | | | | | Bracknell | 3 Jun 18 | |
| 45 | 42.1 | | | 41.43/41.2 | | Kianna Proctor | | 2 | Andy Bibby | Preston | Blackpool | 9 Jun 18 | |
| 42.34 | | | | | | | | | | Bedford | 8 Sep 18 | |
| 48 | 42.12 | | | 42.12 | PB | Susannah Lecoutre | | 2 | Andy Coley-Maud | Guildford & Godalming | Bracknell | 3 Jun 18 | |
| 49 | 42.16 | | | 40.93 | | Tamsin Fowlie | | 1 | Scott Hamilton | Moray | Inverness | 27 May 18 | |
| 50 | 42.17 | | | 42.17 | PB | Maya Marriner | | 2 | Dan Gill | Medway & Maidstone | Bromley | 6 May 18 | |
| 51 | 42.18 | | | 41.00 | | Lily Bailey | | 1 | Jonathan Jackson | Bristol & West | Birmingham | 13 Jul 18 | |
| 52 | 42.19 | | | 42.19 | PB | Maisie Jeger | | 2 | Lee Grint | Southampton | Reading | 17 Jun 18 | |
| 53 | 42.2 | | | 42.21/42.2 | PB | Lucy Atkins | | 2 | Pat Logan | Kingston & Poly | Horsham | 19 May 18 | |
| 42.64 | | | | | | | | | | Crawley | 16 Jun 18 | |
| 53 | 42.2 | | | 42.56/42.2 | PB | Tracy Linus | | 2 | David Leach | Lewes | Brighton | 29 Jun 18 | |
| 42.56 | | | | | | | | | | Crawley | 12 May 18 | |
| 53 | 42.2 | | | 42.2 | PB | Ruby Anning | | 2 | Daniel Brooker | Brighton & Hove | Brighton | 21 Jul 18 | |
| 53 | 42.2 | | | 42.2 | PB | Emily Cann | | 1 | | West Suffolk | Ipswich | 12 Aug 18 | |
| 57 | 42.26 | | | 42.26 | PB | Sophia Deans | | 1 | Sharon Morris | Birchfield H | Stoke Gifford | 21 Jul 18 | |
| 58 | 42.31 | i | | 41.45i | | Katie Burr | | 2 | | Victoria Park City of Glasgow | Emirates Arena | 27 Jan 18 | |
| 59 | 42.33 | | | 42.09i | | Olivia Fowler | | 2 | Mark Machin | Crewe & Nantwich | Stretford | 28 May 18 | |
| 60 | 42.39 | | | 42.39 | PB | Isabelle Harding | | 2 | Stuart Earl | Invicta East Kent | Ashford | 13 May 18 | |
| 60 | 42.39 | i | | 41.43 | | Jenna Hilditch | | 1 | Moira Jordan | Victoria Park City of Glasgow | Emirates Arena | 1 Dec 18 | |
| 62 | 42.40 | | | 42.40/42.3 | PB | Olivia James | | 2 | Richard Jackson | Camberley | Basingstoke | 9 Jun 18 | |
| 63 | 42.4 | | | 42.51/42.4 | PB | Eleanor Milbourn | | 2 | | Hallamshire | Doncaster | 9 Jun 18 | |
| 42.51 | | | | | | | | | | Birmingham | 13 Jul 18 | |
| 64 | 42.45 | i | | 42.04 | | Julia Winogrodzka | | 2 | | Bolton | Sportcity | 16 Dec 18 | |
| 65 | 42.48 | | | 42.48 | PB | Rebecca Squires | | 2 | Philip Long | Exeter | Exeter | 22 Jul 18 | |
| 65 | 42.48 | | | 41.57 | | Jamie Bulbring | | 2 | Tammie Ryder | Tavistock | Tavistock | 12 Aug 18 | |
| 67 | 42.5 | | | 42.51i/42.5 | PB | Olivia Ashdown | | 2 | | Sale Harriers Manchester | Leeds (BP) | 21 Apr 18 | |
| 42.70 | | | | | | | | | | Stretford | 28 May 18 | |
| 67 | 42.5 | | | 46.10/42.5 | PB | Zoe Hunter | | 2 | Edward Gregorczyk | Leeds City | Ellesmere Port | 17 Jun 18 | |
| 67 | 42.5 | | | 41.9 | | Olivia Leigh | | 2 | Katie Hewison | Chorley ATC | Litherland | 30 Jun 18 | |
| 67 | 42.5 | | | 42.74/42.5 | PB | Raegan Sellers | | 1 | | Banbury | Banbury | 21 Jul 18 | |
| 71 | 42.53 | | | 40.23 | | Olivia Boachie | | 1 | | Havering | Hendon | 8 Jul 18 | |
| 72 | 42.54 | i | | 42.54i | PB | Hannah Stone | | 2 | Catherine Breslin | Bracknell AC | Sheffield | 25 Feb 18 | |
| 42.84 | | | | | | | | | | Eton | 13 May 18 | |
| 42.9 | | | | | | | | | | Reading | 9 Jun 18 | |
| 73 | 42.6 | | | 42.64/42.6 | PB | Millie French-Harling | | 2 | Lee Walker | Barnsley AC | Spinkhill | 16 Jun 18 | |
| 73 | 42.6 | | | 40.89 | | Ophelia Pye | | 1 | David Hemery | Marlborough Athletics | Swindon | 1 Jul 18 | |
| 42.64 | | | | | | | | | | Birmingham | 13 Jul 18 | |
| 73 | 42.6 | | | 43.61/42.6 | PB | Valentina Costa | | 2 | Kyle Bennett | Derby | Banbury | 21 Jul 18 | |
| 43.61 | | | | | | | | | | Derby | 21 Apr 18 | |
| 73 | 42.6 | | | 42.19/41.8 | | Chloe Griffith-Mcgeever | | 2 | Barry Edwards | Menai | Bangor | 21 Jul 18 | |
| 43.05 | | | | | | | | | | Cardiff | 14 Jul 18 | |
| 73 | 42.6 | | | 42.68/42.6 | PB | Amani Valli-Carter | | 1 | Peter Crook | Preston | Bebington | 21 Jul 18 | |
| 42.68 | | | | | | | | | | Wakefield | 19 May 18 | |
| 78 | 42.63 | | | 42.63 | PB | Sara Diaz de la Fuente | | 2 | Panos Ioannou | Marshall Milton Keynes | Stoke Gifford | 21 Jul 18 | |
| 79 | 42.68 | | | 41.21 | | Silver Nwabuzor | | 1 | | | Aberdeen | 19 Aug 18 | |
| 80 | 42.7 | | | 41.95/40.9 | | Uche Okpalauko | | 1 | Darren Priestley | Havering | Gateshead | 7 Jul 18 | |
| 42.72 | | | | | | | | | | Chelmsford | 9 Jun 18 | |
| 80 | 42.7 | | | 43.27/42.7 | PB | Megan Pickup | | 1 | | Reading AC | Hornchurch | 21 Jul 18 | |
| 43.27 | | | | | | | | | | Bracknell | 21 Apr 18 | |
| 80 | 42.7 | | | 41.23 | | Erin Bracknell | | 2 | David Buckett | Crawley | Brighton | 31 Aug 18 | |
| 42.71 | | | | | | | | | | Crawley | 12 May 18 | |
| 83 | 42.73 | | | 42.73 | PB | Lauren Etchells | | 2 | Peter Wileman | Durham | Gateshead | 15 Apr 18 | |
| 84 | 42.74 | | | 41.04i | | Stephanie Brooks | | 2 | Martin Fisher | North Somerset | Birmingham | 13 Jul 18 | |
| 84 | 42.74 | | | 42.66 | | Lea Reyna-Faria | | 2 | Ty Holden | Shaftesbury Barnet | Hendon | 5 Aug 18 | |
| 86 | 42.80 | | | 41.17 | | Amarisa Sibley | | 1 | Jay Galley | Blackheath & Bromley | Bromley | 11 Jun 18 | |
| 87 | 42.8 | | | 42.8 | PB | Eleesha Charnley | | 2 | | Blackburn | Blackburn | 12 May 18 | |
| 87 | 42.8 | | | 43.31/42.8 | PB | Abigail Earnshaw | | 2 | | Preston | Litherland | 30 Jun 18 | |
| 45.71 | | | | | | | | | | Stretford | 15 Apr 18 | |
| 87 | 42.8 | | | 39.87 | | Abbie Parker | | 1 | Deborah Keenleyside | Dacorum | Hemel Hempstead | 9 Sep 18 | |
| 90 | 42.86 | | 0.0 | 42.86 | PB | Toritse Etuwewe | | 2 | | Derby | Derby | 28 Jul 18 | |
| 91 | 42.89 | | | 41.65 | | Kia-Licia Clarkson | | 2 | | Sale Harriers Manchester | Wakefield | 19 May 18 | |
| 92 | 42.90 | | | 42.90 | PB | Mya Meadows-Smith | | 2 | | Hampshire Schs | Basingstoke | 9 Jun 18 | |
| 92 | 42.90 | i | | 40.35 | | Favour Joseph | | 1 | Anita Richardson | Sale Harriers Manchester | Sportcity | 16 Dec 18 | |
| 94 | 42.9 | | | 43.35/42.9 | PB | Jasmine Ferguson | | 2 | | Bedford & County | Mile End | 19 May 18 | |
| 43.94 | | | | | | | | | | Bedford | 21 Apr 18 | |
| 94 | 42.9 | | | 43.66/42.9 | PB | Madeleine Tatham | | 1 | Joe McColgan | Amber Valley & Erewash | Abingdon | 8 Jul 18 | |
| 43.66 | | | | | | | | | | Derby | 2 Jun 18 | |
| 94 | 42.9 | | | 43.22/42.9 | PB | Christie Allen | | 2 | Duncan Mason | Salford H | Bangor | 21 Jul 18 | |
| 43.39 | | | | | | | | | | Stretford | 9 Jun 18 | |
| 97 | 42.97 | | | 41.72 | | Eleanor Rayner | | 1 | | Wakefield | Middlesbrough | 2 Sep 18 | |
| 98 | 42.99 | | | 42.99 | PB | Freya Taylor | | 2 | Sue Green | Epsom & Ewell | Kingston | 9 Jun 18 | |
| UK 100 TARGET: 43.00 |
| 99 | 43.0 | | | 43.87/43.0 | PB | Imogen Blackwell | | 1 | Peter Crook | Preston | Litherland | 30 Jun 18 | |
| 99 | 43.0 | | | 43.33/43.0 | PB | Lily Saxon | | 2 | Stuart Albutt | Solihull & Small Heath | Banbury | 21 Jul 18 | |
| 43.90 | | | | | | | | | | Nuneaton | 12 Aug 18 | |
| 101 | 43.01 | | | 42.45 | | Ellie Loweth | | 2 | | Carmarthen | Cardiff | 7 Jul 18 | |
| 102 | 43.02 | | | 43.02 | PB | Jessica Moore | | 2 | Karen Murphy | Shaftesbury Barnet | Hendon | 8 Jul 18 | |
| 103 | 43.05 | | 0.9 | 43.05 | PB | Carys Poole | | 2 | Tony Morris | Swansea | Neath | 3 Jun 18 | |
| 104 | 43.06 | | | 43.06 | PB | Hannah Hutchinson | | 2 | | Deeside AAC | Cardiff | 7 Jul 18 | |
| 105 | 43.07 | | | 43.07 | PB | Isobel Orencas | | 1 | | Wreake & Soar Valley | Loughborough | 25 Aug 18 | |
| 106 | 43.08 | | | 43.08 | PB | Jessica Clark | | 2 | | Cambridge & Coleridge | Hendon | 5 Aug 18 | |
| 107 | 43.10 | | | 42.88/42.1 | | Marina Semple | | 2 | | Radley | Horspath | 12 May 18 | |
| 108 | 43.1 | | | 44.32i/43.1 | PB | Ruby Spencer | | 2 | Joe Frost | Macclesfield | Leigh | 21 Apr 18 | |
| 108 | 43.1 | | | 43.1 | PB | Kayleigh Watson | | 2 | | Carlisle Aspatria | Hyndburn | 26 May 18 | |
| 108 | 43.1 | | | 42.89/42.7 | | Amelia Proctor | | 2 | | Scunthorpe & District AC (Defunct) | Hull | 30 Jun 18 | |
| 43.88 | | | | | | | | | | Hull | 12 May 18 | |
| 108 | 43.1 | | | 43.20/43.1 | PB | Amelia Hucks | | 2 | | Menai | Bangor | 21 Jul 18 | |
| 44.34 | | | | | | | | | | Brecon | 25 Aug 18 | |
| 108 | 43.1 | | | 42.52i | | Grace Brennan | | 2 | | Team East Lothian | Grangemouth | 28 Jul 18 | |
| 43.18 | | | | | | | | | | Grangemouth | 29 Jul 18 | |
| 113 | 43.13 | | | 39.19 | | Jessica Astill | | 1 | | Stevenage & North Herts | Hemel Hempstead | 9 Jun 18 | |
| 114 | 43.14 | | | 42.10 | | Isabella Merritt | | 1 | Andy Townsend | Horwich | Stretford | 28 May 18 | |
| 114 | 43.14 | | | 43.14 | PB | Daisy Weiser | | 2 | George Freeman-Austin | Reading AC | Reading | 17 Jun 18 | |
| 116 | 43.15 | | | 43.15 | PB | Ruby Bell | | 2 | Trevor Painter | Sale Harriers Manchester | Stretford | 28 May 18 | |
| 117 | 43.17 | | | 42.31 | | Evie Watkins | | 1 | Arwyn Davies | Barry & Vale | Cardiff | 23 May 18 | |
| 118 | 43.2 | | | 43.70/43.2 | PB | Jemima Bestley | | 2 | Eddison Williams | Ipswich | Bury St Edmunds | 16 Sep 18 | |
| 45.47 | i | | | | | | | | | Lee Valley | 21 Jan 18 | |
| 46.88 | | | | | | | | | | Woodford | 31 Mar 18 | |
| 119 | 43.21 | | | 43.21 | PB | Sophie Grant | | 2 | | Orion | Woodford | 17 Jun 18 | |
| 120 | 43.22 | | | 42.44 | | Isobel Geere | | 1 | | Stevenage & North Herts | Hemel Hempstead | 9 Jun 18 | |
| 121 | 43.23 | | | 43.23 | PB | Ellie Gilder | | 2 | Paul Herrington | Reading AC | Bromley | 19 May 18 | |
| 121 | 43.23 | | | 41.91/41.7 | | Sophie Forbes-Laird | | 1 | James Webster | Biggleswade | Sandy | 29 Sep 18 | |
| 123 | 43.25 | | | 43.25 | PB | Rachel Muir | | 2 | Arthur Smith | Kilbarchan | Kilmarnock | 20 May 18 | |
| 124 | 43.26 | | | 43.26 | PB | Cariad Norris | | 1 | | Guildford & Godalming | Birmingham | 3 Jul 18 | |
| 125 | 43.28 | | | 43.28 | PB | Rosie Domican | | 2 | | Cardiff Archers | Cardiff | 23 May 18 | |
| 126 | 43.3 | | | 43.98/43.3 | PB | Amelia Metcalf | | 2 | | Seaton | Carlisle | 9 Jun 18 | |
| 43.98 | | | | | | | | | | Gateshead | 16 Jun 18 | |
| 126 | 43.3 | | | 42.19 | | Amy Greig | | 1 | Remy Bosman | St. Mary's Richmond | Hemel Hempstead | 21 Jul 18 | |
| 43.93 | | | | | | | | | | Bedford | 21 Apr 18 | |
| 126 | 43.3 | | | 44.42/43.3 | PB | Shanice Thompson | | 2 | | Luton | Hemel Hempstead | 21 Jul 18 | |
| 44.42 | | | | | | | | | | Hendon | 8 Jul 18 | |
| 129 | 43.31 | | | 42.61 | | Holly Fowler | | 2 | Stephen Humberstone | Hallamshire | Cudworth | 12 May 18 | |
| 129 | 43.31 | | | 43.31 | PB | Zoe St John | | 2 | | Hertfordshire Schs | Hemel Hempstead | 9 Jun 18 | |
| 131 | 43.33 | | | 43.33/43.2 | PB | Alex Spurway | | 1 | | Leamington Athletics Academy | Nuneaton | 12 May 18 | |
| 131 | 43.33 | | | 42.91 | | Mia Liddell | | 2 | Daniel Njai-Rowney | Blyth | Middlesbrough | 13 May 18 | |
| 133 | 43.39 | | | 41.93 | | Katie Johnson | | 1 | | Edinburgh AC | Bedford | 8 Sep 18 | |
| 134 | 43.40 | | | 41.36/41.3 | | Sophie Anderson | | 2 | Colin Corless | Southend | Chelmsford | 12 May 18 | |
| 135 | 43.4 | | | 43.61/43.4 | PB | Leah Jay | | 1 | | Luton | Bedford | 13 May 18 | |
| 44.08 | | | | | | | | | | Hendon | 8 Jul 18 | |
| 135 | 43.4 | | | 45.03/43.4 | PB | Emmeline Viala | | 1 | | Harrow | Mile End | 19 May 18 | |
| 45.03 | | | | | | | | | | Bedford | 21 Apr 18 | |
| 135 | 43.4 | | | 43.82/43.4 | PB | Emma Wood | | 2 | Mike Stayman | Leeds City | Ellesmere Port | 17 Jun 18 | |
| 43.82 | | | | | | | | | | Wakefield | 23 May 18 | |
| 135 | 43.4 | | | 42.82 | | Charlotte Underwood | | 2 | Barry Hearn | Marshall Milton Keynes | Rugby | 17 Jun 18 | |
| 43.53 | | | | | | | | | | Coventry | 19 May 18 | |
| 139 | 43.42 | | | 43.42 | PB | Daisy Coulson-Bascombe | | 1 | | Huntingdonshire | Birmingham | 3 Jul 18 | |
| 139 | 43.42 | | | 43.08 | | Isla Brown | | 1 | Alan Hewson | Windsor Slough Eton & Hounslow | Lee Valley | 11 Aug 18 | |
| 141 | 43.45 | | | 42.61 | | Erin Hughes | | 2 | Steve Fury | Medway & Maidstone | Gillingham | 17 Jun 18 | |
| 142 | 43.47 | | | 43.47/43.3 | PB | Amber Threlfall | | 2 | | Birchfield H | Coventry | 19 May 18 | |
| 142 | 43.47 | | | 43.47 | PB | Patricia Stanfield | | 2 | Ian Willoughby | Gloucester | Exeter | 16 Jun 18 | |
| 144 | 43.48 | | | 42.35i/42.3 | | Hermione Mason | | 1 | David Lowe | Sale Harriers Manchester | Liverpool | 11 Aug 18 | |
| 145 | 43.49 | | | 43.08 | | Mia Belton | | 1 | | Morpeth | Hexham | 15 Jul 18 | |
| 146 | 43.5 | | | 42.70 | | Stephanie Jones | | 1 | Daniel Gilroy | West Cheshire | Ellesmere Port | 17 Jun 18 | |
| 44.34 | i | | | | | | | | | Sportcity | 16 Dec 18 | |
| 45.23 | | | | | | | | | | Wigan | 8 Apr 18 | |
| 146 | 43.5 | | | 44.38/43.5 | PB | Amelia Smith | | 2 | Graham Felton | Royal Sutton Coldfield | Banbury | 21 Jul 18 | |
| 44.38 | | | | | | | | | | Nuneaton | 12 May 18 | |
| 146 | 43.5 | | | 43.56/43.0 | | Ashleigh Sidney | | 2 | | Vale of Aylesbury | Hemel Hempstead | 21 Jul 18 | |
| 146 | 43.5 | | | 40.66 | | Emmanuella Quaye | | 1 | Darren Braithwaite | Enfield & Haringey | St. Albans | 5 Aug 18 | |
| 150 | 43.51 | | | 43.51 | PB | Ellie Chivers | | 2 | | Mendip | Yeovil | 12 May 18 | |
| 151 | 43.52 | | | 43.52 | PB | Dani Mauchlen | | 2 | Steven Alan Thompson | Pitreavie | Grangemouth | 20 May 18 | |
| 152 | 43.54 | | | 41.85 | | Neve Woodward | | 1 | | Rushcliffe | Nuneaton | 12 Aug 18 | |
| 153 | 43.56 | | | 43.56 | PB | Kessi Hodgins-Peka | | 1 | | Sutton & District | Kingston | 9 Jun 18 | |
| 154 | 43.59 | | | 42.91 | | Rosie Hughes | | 2 | Lee Cleary-Morgan | North Shields Poly | Middlesbrough | 13 May 18 | |
| 155 | 43.6 | | | 43.51 | | Cara Davie | | 1 | Tom Leeson | Banchory Stonehaven | Perth | 27 May 18 | |
| 44.81 | | | | | | | | | | Aberdeen | 16 May 18 | |
| 155 | 43.6 | | | 44.12/43.6 | PB | Amelia Bates | | 2 | Jason Marchant | Dartford H | Ashford | 8 Jul 18 | |
| 44.12 | | | | | | | | | | Dartford | 20 Jun 18 | |
| 157 | 43.62 | | | 43.62 | PB | Grace Hucknall | | 2 | John Garner | Watford | Watford | 12 May 18 | |
| 158 | 43.63 | | | 43.63 | PB | Olivia Berry | | 2 | Andy Frankish | Blackheath & Bromley | Bromley | 11 Jun 18 | |
| 159 | 43.66 | | | 42.04 | | Sadie Blake | | 1 | Ann Hayter | City of Portsmouth | Portsmouth | 12 May 18 | |
| 160 | 43.67 | | | 41.62 | | Cameron Kelly-Gordon | | 1 | | Blackheath & Bromley | Bromley | 11 Jun 18 | |
| 160 | 43.67 | | | 42.19 | | Lucy Fraser | | 2 | Alan Erickson | Perth Strathtay | Grangemouth | 11 Aug 18 | |
| 162 | 43.68 | | | 43.68 | PB | Tayllah Barton-Conde | | 2 | Darren Priestley | Havering | Hendon | 8 Jul 18 | |
| 163 | 43.7 | | | 42.71 | | Chyna Stewart | | 2 | | Herne Hill | Tooting Bec | 19 May 18 | |
| 44.29 | | | | | | | | | | Tooting Bec | 7 May 18 | |
| 163 | 43.7 | | | 42.71i/42.4 | | Eve Garry | | 1 | Alan Erickson | Perth Strathtay | Perth | 27 May 18 | |
| 163 | 43.7 | | | 44.15/43.7 | PB | Samantha Reece | | 1 | | Aldershot, Farnham & District | Basingstoke | 1 Jul 18 | |
| 44.15 | | | | | | | | | | Portsmouth | 12 May 18 | |
| 163 | 43.7 | | | 44.60/43.7 | PB | Darcie Conroy-Warner | | 2 | Brian Darby | Coventry | Abingdon | 8 Jul 18 | |
| 44.60 | | | | | | | | | | Coventry | 19 May 18 | |
| 163 | 43.7 | | | 43.22 | | Emily Plimmer | | 2 | | Wakefield | Wakefield | 22 Jul 18 | |
| 163 | 43.7 | | | 43.94/43.7 | PB | Delleah Belgrave | | 1 | Tony Jackson | Swindon | Cheltenham | 25 Jul 18 | |
| 44.53 | i | | | | | | | | | Cardiff | 2 Dec 18 | |
| 163 | 43.7 | | | 42.56 | | Lucy Kirby | | 2 | Trevor Simcox | Crawley | Horsham | 27 Jul 18 | |
| 44.13 | | | | | | | | | | Tavistock | 12 Aug 18 | |
| 170 | 43.71 | | | 43.58 | | Hannah Moody | | 1 | | Chesterfield | Derby | 2 Jun 18 | |
| 171 | 43.72 | | | 43.72 | PB | Amani Kohler | | 1 | | Highgate | Hendon | 9 Jun 18 | |
| 172 | 43.74 | | | 43.74 | PB | Gabrielle Garcia | | 2 | | Swansea | Brecon | 11 Jul 18 | |
| 172 | 43.74 | | | 41.74 | | Hannahlise Bolt | | 2 | | Barry & Vale | Cardiff | 14 Jul 18 | |
| 174 | 43.77 | | | 43.77 | PB | Ernesta Amash | | 1 | | Newham & Essex Beagles | Gillingham | 17 Jun 18 | |
| 175 | 43.79 | | | 41.79 | | Abigail Phillips | | 1 | Zac Kerin | Bournemouth | Exeter | 22 Jul 18 | |
| 176 | 43.8 | | | 42.94/42.8 | | Emily Dunkley | | 1 | Claire East | City of Portsmouth | Portsmouth | 10 Jun 18 | |
| 44.87 | | | | | | | | | | Portsmouth | 12 May 18 | |
| 176 | 43.8 | | | 43.8 | PB | Ellen Mary Kearney | | 2 | Sarah Kearney | Wirral | Ellesmere Port | 17 Jun 18 | |
| 176 | 43.8 | | | 43.67/43.4 | | Katelyn Howden | | 1 | | Cleethorpes | Wakefield | 24 Jun 18 | |
| 176 | 43.8 | | | 44.45i/43.8 | PB | Imogen Reader | | 2 | Dezz Reynolds | Blackpool, Wyre & Fylde | Litherland | 30 Jun 18 | |
| 176 | 43.8 | | | 42.72/42.7 | | Chloe Jardine | | 1 | John Gates | Bexley | Brighton | 21 Jul 18 | |
| 44.21 | | | | | | | | | | Gillingham | 17 Jun 18 | |
| 181 | 43.81 | | | 43.81 | PB | Lowis Johnson | | 2 | | Wrexham | Brecon | 11 Jul 18 | |
| 182 | 43.87 | | | 43.87 | PB | Ella Matthews | | 2 | Peter Witcomb | Brighton & Hove | Crawley | 12 May 18 | |
| 183 | 43.89 | i | | 42.97 | | Charlotte Wilkinson | | 2 | Joe Frost | | Sportcity | 16 Dec 18 | |
| 184 | 43.90 | | | 43.90 | PB | Emilia Stokes | | 2 | | Invicta East Kent | Ashford | 9 Jun 18 | |
| 185 | 43.9 | | | 44.23/43.9 | PB | Alicia Beverley | | 2 | Chris Mole | North Shields Poly | Hexham | 9 Jun 18 | |
| 44.23 | | | | | | | | | | Hexham | 15 Jul 18 | |
| 185 | 43.9 | | | 42.29 | | Lucy Hunt | | 2 | | Jersey | St. Clement | 15 Jul 18 | |
| 43.98 | | | | | | | | | | Portsmouth | 12 May 18 | |
| 185 | 43.9 | | | 43.84 | | Ruby Hancox | | 2 | Stephen O'Brien | Telford AC | Banbury | 21 Jul 18 | |
| 185 | 43.9 | | | 43.9 | PB | Tamia Meggie-Graham | | 2 | Paul Weston | Croydon | Croydon | 21 Jul 18 | |
| 185 | 43.9 | | | 43.67/42.8 | | Madelaine Gillis | | 1 | | Middlesbrough (Mandale) | Middlesbrough | 21 Jul 18 | |
| 44.47 | | | | | | | | | | Sheffield | 17 Jun 18 | |
| 185 | 43.9 | | | 41.9 | | Ava Lloyd | | 1 | Trevor Painter | Wigan & District | Wigan | 21 Jul 18 | |
| 191 | 43.91 | | | 43.91 | PB | Reese Robinson | | 2 | Carlo Monticolombi | Invicta East Kent | Ashford | 9 Jun 18 | |
| 192 | 43.92 | | | 43.53 | | Lucy Loades | | 2 | Andrew Hughes | Bracknell AC | Eton | 13 May 18 | |
| 192 | 43.92 | | | 41.86 | | Alice Geoghegan | | 1 | | Morpeth | Morpeth | 24 Jun 18 | |
| 194 | 43.98 | | | 41.22 | | Holly Kirkwood | | 1 | John Wilson | Victoria Park City of Glasgow | Gothenburg, SWE | 1 Jul 18 | |
| 195 | 43.99 | | | 43.99 | PB | Anouska Fairhurst | | 2 | David Leach | Lewes | Crawley | 12 May 18 | |
| 196 | 44.0 | | | 44.0 | PB | Matilda Somerville-Cotton | | 2 | Aidan Bailey | Corby | Corby | 13 May 18 | |
| 196 | 44.0 | | | 44.86i/44.0 | PB | Brogan Beattie | | 2 | | Tweed, Leader, Jed Track | Grangemouth | 23 Jun 18 | |
| 196 | 44.0 | | | 39.08 | | Charlotte Kelsey | | 2 | Glynn Williams | Middlesbrough (Mandale) | Darlington | 26 Jun 18 | |
| 44.61 | | | | | | | | | | Sheffield | 17 Jun 18 | |
| 196 | 44.0 | | | 43.55 | | Holly Bates | | 2 | | Coventry | Abingdon | 8 Jul 18 | |
| 44.19 | | | | | | | | | | Coventry | 4 Jul 18 | |
| 196 | 44.0 | | | 44.0 | PB | Katie Crook | | 2 | | Western | Douglas | 14 Jul 18 | |
| 201 | 44.04 | | | 44.04 | PB | Kirsty Arnaud | | 2 | | Inverness | Grangemouth | 9 Jun 18 | |
| 201 | 44.04 | | | 44.04 | PB | Philipa Bailey | | 2 | | Greater Manchester Schs | Stretford | 9 Jun 18 | |
| 203 | 44.05 | i | | 44.05i | PB | Emma Shipley | | 1 | Steven Marshall | Hallamshire | Sheffield | 25 Mar 18 | |
| 44.9 | | | | | | | | | | Spinkhill | 16 Jun 18 | |
| 204 | 44.08 | | | 42.13/41.8 | | Jessica Starling | | 2 | Brian Darby | Coventry | Coventry | 6 Jun 18 | |
| 204 | 44.08 | | | 42.70i | | Kelsey Pullin | | 2 | Jay Galley | Blackheath & Bromley | Ashford | 9 Jun 18 | |
| 206 | 44.10 | | | 44.10 | PB | Lilac Vigor | | 2 | | Notts | Birmingham | 16 Jun 18 | |
| 206 | 44.10 | | | 44.10 | PB | Niamh Latibeaudiere | | 2 | Mike Cooke | Doncaster | Doncaster | 21 Jul 18 | |
| 208 | 44.1 | | | 46.55i/44.1 | PB | Grace Colmer | | 1 | Andrew Fisher | Southampton | Southampton | 11 Apr 18 | |
| 46.55 | i | | | | | | | | | Lee Valley | 7 Jan 18 | |
| 208 | 44.1 | | | 45.94/44.1 | PB | Freya Kesteven | | 1 | | Harrogate | Leeds (BP) | 21 Apr 18 | |
| 45.94 | | | | | | | | | | Wakefield | 19 May 18 | |
| 208 | 44.1 | | | 40.43 | | Katie Evans | | 1 | Dean Exton | Dorchester | Bournemouth | 9 Jun 18 | |
| 44.19 | | | | | | | | | | Exeter | 22 Jul 18 | |
| 208 | 44.1 | | | 44.52/44.1 | PB | Emma Pulcella | | 1 | Gordon Densley | Tamworth | Stoke | 9 Jun 18 | |
| 44.52 | | | | | | | | | | Birmingham | 16 Jun 18 | |
| 208 | 44.1 | | | 44.50/44.1 | PB | Kai Snell | | 2 | | Yeovil | Street | 13 Jun 18 | |
| 45.70 | | | | | | | | | | Exeter | 22 Jul 18 | |
| 208 | 44.1 | | | 44.56/44.1 | PB | Isabella Martin | | 1 | Roy Hayward | Brighton Phoenix | Brighton | 29 Jun 18 | |
| 44.56 | | | | | | | | | | Crawley | 12 May 18 | |
| 208 | 44.1 | | | 44.86/44.1 | PB | Mia Moore | | 2 | | Ryston | Peterborough | 5 Aug 18 | |
| 44.86 | | | | | | | | | | Horspath | 1 Sep 18 | |
| 208 | 44.1 | | | 44.58i/44.1 | PB | Jessica Beaton | | 2 | Deborah Keenleyside | Dacorum | St. Albans | 5 Aug 18 | |
| 216 | 44.12 | | | 44.12 | PB | Daniella Harper | | 2 | Jay Galley | Blackheath & Bromley | Bromley | 6 May 18 | |
| 217 | 44.14 | | | 44.14 | PB | Caitlin Paul | | 2 | Hilary Jones | Walton | Kingston | 13 May 18 | |
| 218 | 44.17 | i | | 43.58 | | Chloe Simmonite | | 1 | | Swansea | Cardiff | 2 Dec 18 | |
| 219 | 44.19 | | | 43.15 | | Charlotte Maxwell | | 1 | Hilary Jones | Walton | Kingston | 13 May 18 | |
| 220 | 44.2 | | | 44.2 | PB | Eva Holland | | 2 | James McDonald | Herne Hill | Eton | 21 Apr 18 | |
| 220 | 44.2 | | | 44.60/44.2 | PB | Sydney Allen | | 2 | | Shaftesbury Barnet | Basildon | 3 Jun 18 | |
| 220 | 44.2 | | | 44.2 | PB | Sophie Hetherington | | 2 | | Cumbria Schs | Carlisle | 9 Jun 18 | |
| 220 | 44.2 | | | 41.44 | | Therese Tolan | | 1 | Charlene Thomas | Harrogate | York | 9 Jun 18 | |
| 44.65 | | | | | | | | | | Cudworth | 12 May 18 | |
| 220 | 44.2 | | | 44.2 | PB | Emma Ibbertson | | 2 | | North Yorkshire Schs | York | 9 Jun 18 | |
| 220 | 44.2 | | | 44.2 | PB | Millie Venner-Coombes | | 2 | | Somerset Schs | Street | 13 Jun 18 | |
| 220 | 44.2 | | | 41.55 | | Callie Coates | | 1 | Martin Godfrey | Doncaster | Rotherham | 17 Jun 18 | |
| 44.87 | | | | | | | | | | Hull | 19 May 18 | |
| 220 | 44.2 | | | 45.85/44.2 | PB | Dalis Jones | | 2 | Phil Lucker | Yate | Yate | 1 Jul 18 | |
| 220 | 44.2 | | | 42.63/42.4 | | Arantxa Middleton | | 1 | Gordon Densley | Tamworth | Corby | 8 Jul 18 | |
| 45.00 | | | | | | | | | | Loughborough | 25 Aug 18 | |
| 220 | 44.2 | | | 43.00 | | Kyra Sethna-McIntosh | | 2 | | Croydon | Croydon | 21 Jul 18 | |
| 45.44 | | | | | | | | | | Wimbledon | 8 Apr 18 | |
| 220 | 44.2 | | | 43.32 | | Heidi Taylor | | 2 | Mark Pauley | Poole AC | Kingston | 21 Jul 18 | |
| 44.42 | | | | | | | | | | Exeter | 8 Jul 18 | |
| 220 | 44.2 | | | 45.67/44.2 | PB | Natalie Hughes | | 2 | | Ipswich | Ipswich | 22 Jul 18 | |
| 220 | 44.2 | | | 42.58 | | Lydia Edwards | | 2 | | St. Albans AC | St. Albans | 5 Aug 18 | |
| 233 | 44.21 | | | 42.11 | | Estelle Roots | | 1 | Stephen Cottle | Torbay | Exeter | 9 Jun 18 | |
| 234 | 44.22 | | | 43.82/43.8 | | Nia Amaning | | 1 | Carl Graham | Newham & Essex Beagles | Lee Valley | 11 Aug 18 | |
| 235 | 44.24 | | | 44.24 | PB | Lucy Evans | | 2 | | St. Albans AC | Hemel Hempstead | 9 Jun 18 | |
| 235 | 44.24 | | 0.0 | 44.24 | PB | Sienna Grant | | 2 | | Amber Valley & Erewash | Derby | 28 Jul 18 | |
| 237 | 44.26 | | | 44.26 | PB | Emma Williamson | | 2 | | Suffolk Schs | Birmingham | 3 Jul 18 | |
| 238 | 44.27 | | | 44.27 | PB | Emily Haines-Gray | | 2 | Paul Kelsey | Oxford City | Horspath | 12 May 18 | |
| 238 | 44.27 | | | 44.27 | PB | Rebecca Hutchings | | 1 | | Kent Schs | Birmingham | 3 Jul 18 | |
| 240 | 44.28 | | | 41.67i/41.5 | | Ariyanna McGee | | 2 | Vespa Ellis | Basildon | Gillingham | 17 Jun 18 | |
| 241 | 44.3 | | | 43.60 | | Gina Speakman | | 2 | | Halifax | Cudworth | 29 Apr 18 | |
| 241 | 44.3 | | | 45.51/44.3 | PB | Abbie Crawford | | 1 | Tom Leeson | Banchory Stonehaven | Perth | 27 May 18 | |
| 45.51 | | | | | | | | | | Aberdeen | 16 May 18 | |
| 241 | 44.3 | | | 43.91i/43.9 | | Jorja Webb | | 2 | Mark Wanklyn | Cheltenham | Cheltenham | 9 Jun 18 | |
| 44.49 | | | | | | | | | | Exeter | 16 Jun 18 | |
| 241 | 44.3 | | | 43.66 | | Georgia Corcoran | | 2 | | Silson | Corby | 9 Jun 18 | |
| 45.10 | | | | | | | | | | Birmingham | 16 Jun 18 | |
| 241 | 44.3 | | | 46.44/43.9 | | Sarah Wilcock | | 2 | Robin Rutherford | Darlington H | Jarrow | 9 Jun 18 | |
| 241 | 44.3 | | | 44.3 | PB | Sophie Reeves | | 2 | | Nene Valley | Norwich | 16 Jun 18 | |
| 241 | 44.3 | | | 44.3 | PB | Megan Short | | 1 | | Leigh | Carlisle | 17 Jun 18 | |
| 241 | 44.3 | | | 44.3 | PB | Erin Treacy | | 2 | Bill Boyd | Corby | Corby | 19 Jun 18 | |
| 241 | 44.3 | | | 42.14 | | Lois Creasey | | 1 | David Howells | Middlesbrough (Mandale) | Darlington | 26 Jun 18 | |
| 241 | 44.3 | | | 44.65/40.2 | | Eleanor Colbourn | | 1 | Joanne Day | Harrogate | Bebington | 21 Jul 18 | |
| 44.65 | | | | | | | | | | Morpeth | 24 Jun 18 | |
| 241 | 44.3 | | | 43.33 | | Esther Hulley | | 2 | Pete Torrance | Stockport | Middlesbrough | 21 Jul 18 | |
| 241 | 44.3 | | | 44.3 | PB | Ciara Ellis | | 2 | | City of Stoke | Warrington | 19 Aug 18 | |
| 253 | 44.32 | | | 44.32/43.2 | PB | Katie Ridley | | 1 | Daniel Brooker | Brighton & Hove | Crawley | 12 May 18 | |
| 253 | 44.32 | | | 43.92i | | Molly Cornes | | 2 | Kenneth Pearson | Central | Scotstoun | 17 Jun 18 | |
| 255 | 44.33 | | | 44.33 | PB | Rebecca Maddy | | 2 | | Cambridge H | Bromley | 6 May 18 | |
| 256 | 44.34 | | | 44.34 | PB | Francesca Evered | | 2 | David Mills | Reigate Priory | Kingston | 13 May 18 | |
| 257 | 44.38 | | | 42.59 | | Kate Howard | | 2 | | Westbury | Yate | 17 Jun 18 | |
| 258 | 44.39 | | | 44.11/43.9 | | Michelle Yalekhue | | 1 | Amanda Edgley-Pearce | Medway & Maidstone | Ashford | 13 May 18 | |
| 258 | 44.39 | i | | 41.94i | | Emma Fisher | | 1 | Hilary Jones | Walton | Lee Valley | 2 Dec 18 | |
| 260 | 44.4 | | | 45.40/44.4 | PB | Emily Collard | | 2 | | Cambridge & Coleridge | Corby | 9 Jun 18 | |
| 46.25 | | | | | | | | | | Lee Valley | 11 Aug 18 | |
| 260 | 44.4 | | | 45.10/44.4 | PB | Madison Torbitt | | 1 | | Wreake & Soar Valley | Banbury | 24 Jun 18 | |
| 45.10 | | | | | | | | | | Grimsby | 28 May 18 | |
| 260 | 44.4 | | | 43.97/43.8 | | Tia Neill | | 2 | Peter Wareing | Southampton | Swindon | 24 Jun 18 | |
| 44.73 | | | | | | | | | | Bromley | 19 May 18 | |
| 260 | 44.4 | | | 44.48/44.4 | PB | Sienna Richardson | | 1 | Dave Ragan | Basingstoke & Mid Hants | Basingstoke | 1 Jul 18 | |
| 46.78 | | | | | | | | | | Bracknell | 3 Jun 18 | |
| 264 | 44.43 | | | 44.43 | PB | Ellie Dolby | | 2 | Jay Galley | Blackheath & Bromley | Bromley | 6 May 18 | |
| 264 | 44.43 | | | 44.43 | PB | Mia Hopkins | | 2 | | Cheltenham | Exeter | 16 Jun 18 | |
| 266 | 44.44 | | | 44.44 | PB | Dawn Valentine | | 2 | | Newton Abbot | Exeter | 8 Jul 18 | |
| 267 | 44.45 | | | 44.45 | PB | Beatrice Aherne | | 2 | | Tonbridge | Crawley | 9 Jun 18 | |
| 267 | 44.45 | | | 43.04 | | Anise Macaulay Orr | | 1 | | Edinburgh AC | Grangemouth | 29 Jul 18 | |
| 269 | 44.48 | | | 44.48/43.3 | PB | Emeline Brown | | 2 | | St. Albans AC | Hemel Hempstead | 9 Jun 18 | |
| 270 | 44.49 | | | 44.49 | PB | Sydney Green | | 2 | | Hereford & Worcester Schs | Birmingham | 16 Jun 18 | |
| 271 | 44.50 | | | 43.00 | | Tabitha Proudley | | 2 | Katy Odell | Southampton | Bracknell | 21 Apr 18 | |
| 271 | 44.50 | | | 44.50 | PB | Havana Sale | | 2 | | Windsor Slough Eton & Hounslow | Bracknell | 3 Jun 18 | |
| 271 | 44.50 | | | 44.02 | | Emma Penney | | 2 | | City of Portsmouth | Basingstoke | 9 Jun 18 | |
| 274 | 44.5 | | | 44.5 | PB | Macy Noblett | | 2 | Gary Tunstall | Preston | Leeds (BP) | 21 Apr 18 | |
| 274 | 44.5 | | | 43.31/42.8 | | Hannah Smith | | 2 | | Harborough | Nuneaton | 19 May 18 | |
| 274 | 44.5 | | | 45.97/44.5 | PB | Lola Venditozzi | | 1 | | Dundee Hawkhill | Perth | 27 May 18 | |
| 45.97 | | | | | | | | | | Aberdeen | 17 Jun 18 | |
| 274 | 44.5 | | | 44.06i/43.8 | | Mya Ashbourne | | 2 | | Harrow | Wormwood Scrubs | 17 Jun 18 | |
| 45.29 | | | | | | | | | | Lee Valley | 11 Aug 18 | |
| 274 | 44.5 | | | 44.5 | PB | Amber Blake | | 2 | | Bodyworks | Brighton | 29 Jun 18 | |
| 274 | 44.5 | | | 44.12 | | Hannah Smith | | 2 | John Messum | Deeside AAC | Wrexham | 21 Jul 18 | |
| 274 | 44.5 | | | 44.78/44.1 | | Holly Brewster | | 1 | Thomas Reed | Longwood | Wakefield | 22 Jul 18 | |
| 281 | 44.51 | | | 43.43 | | Kitty Mair | | 1 | Beverley Kitching | Bracknell AC | Bromley | 19 May 18 | |
| 281 | 44.51 | | | 44.51 | PB | Ella Owen | | 2 | | Eryri | Cardiff | 7 Jul 18 | |
| 281 | 44.51 | | | 44.51 | PB | Demi Locker | | 1 | Vince Wilson | Charnwood | Loughborough | 1 Aug 18 | |
| 284 | 44.54 | i | | 42.94 | | Kyla Joy Francis | | 2 | Sue Keen | Eastbourne | Lee Valley | 2 Dec 18 | |
| 44.66 | | | | | | | | | | Crawley | 25 Jul 18 | |
| 45.1 | | | | | | | | | | Brighton | 31 Aug 18 | |
| 285 | 44.55 | | | 43.55/42.8 | | Catriona Scott | | 1 | Moira Jordan | Victoria Park City of Glasgow | Scotstoun | 30 May 18 | |
| 286 | 44.56 | | | 44.56 | PB | Tilly Mycroft | | 1 | Lee Walker | Sheffield & Dearne | Cudworth | 12 May 18 | |
| 286 | 44.56 | | | 44.56/43.7 | PB | Abbie Hall | | 2 | James Wright | Rugby & Northampton | Coventry | 19 May 18 | |
| 286 | 44.56 | | | 44.56 | PB | Katie Clark | | 1 | Dave Combe | Dundee Hawkhill | Aberdeen | 19 Aug 18 | |
| 289 | 44.57 | | | 44.57/43.3 | PB | Megan Burge | | 2 | Grant Taylor | Rugby & Northampton | Coventry | 19 May 18 | |
| 290 | 44.6 | | | 44.6 | PB | Ketshia Makita | | 1 | | Leicester | Dudley | 17 Jun 18 | |
| 290 | 44.6 | | | 44.81/44.6 | PB | Makarios Mensah | | 1 | Anthony Mayhew | Herne Hill | Portsmouth | 17 Jun 18 | |
| 290 | 44.6 | | | 44.6 | PB | Ellie Owen | | 2 | Dezz Reynolds | Blackpool, Wyre & Fylde | Litherland | 30 Jun 18 | |
| 290 | 44.6 | | | 42.0 | | Keira Gray | | 1 | | Manx | Bangor | 21 Jul 18 | |
| 294 | 44.61 | | | 43.19 | | Eve Ward | | 2 | | Blackheath & Bromley | Bracknell | 21 Apr 18 | |
| 294 | 44.61 | | | 44.61 | PB | Molly Reville | | 1 | Linda Nicholson | Edinburgh AC | Grangemouth | 20 May 18 | |
| 294 | 44.61 | i | | 43.25i | | Alexandra Cathie | | 2 | Thomas Graham | Whitemoss | Emirates Arena | 1 Dec 18 | |
| 45.53 | | | | | | | | | | Kilmarnock | 12 May 18 | |
| 297 | 44.63 | | | 43.81 | | Gemma MacRitchie | | 2 | | Stornoway | Stornoway | 15 Sep 18 | |
| 298 | 44.64 | | | 44.64 | PB | Chloe Love | | 2 | | Scunthorpe & District AC (Defunct) | Grimsby | 28 May 18 | |
| 299 | 44.65 | | | 42.97 | | Isabella Fassnidge | | 2 | Nigel Brooks | Tonbridge | Bromley | 6 May 18 | |
| 299 | 44.65 | | | 44.65 | PB | Charlotte Black | | 1 | | Sussex Schs | Birmingham | 3 Jul 18 | |
| 301 | 44.69 | | | 44.69 | PB | Ola Zurakowska | | 2 | | Kilbarchan | Grangemouth | 9 Jun 18 | |
| 302 | 44.70 | | | 44.19 | | Jessamine Hughes | | 1 | Martyn Gibbons | Notts | Coventry | 19 May 18 | |
| 303 | 44.7 | | | 46.05i/44.7 | PB | Abbie Birchenough | | 1 | | Crewe & Nantwich | Blackburn | 21 Apr 18 | |
| 46.05 | i | | | | | | | | | Sportcity | 16 Dec 18 | |
| 303 | 44.7 | | | 43.4 | | Hope Seme | | 2 | | City of Norwich | Grays | 6 May 18 | |
| 303 | 44.7 | | | 44.73/44.7 | PB | Lacey Fowler | | 2 | Peter Witcomb | Brighton & Hove | Lewes | 19 May 18 | |
| 44.73 | | | | | | | | | | Gillingham | 17 Jun 18 | |
| 303 | 44.7 | | | 45.17/44.7 | PB | Olivia Brown | | 1 | Michael Taylor | Wycombe | Mile End | 19 May 18 | |
| 45.17 | | | | | | | | | | Bedford | 21 Apr 18 | |
| 303 | 44.7 | | | 44.0 | | Ruby Mace | | 2 | Tony Benton | Havering | Colchester | 3 Jun 18 | |
| 303 | 44.7 | | | 45.72/44.1 | | Demi Eves | | 2 | Brenda Stone | Thurrock | Colchester | 3 Jun 18 | |
| 45.72 | | | | | | | | | | Stevenage | 2 Sep 18 | |
| 303 | 44.7 | | | 44.77/44.7 | PB | Emily Hunter | | 2 | | Hallamshire | Doncaster | 9 Jun 18 | |
| 45.25 | | | | | | | | | | Stretford | 7 May 18 | |
| 303 | 44.7 | | | 44.7 | PB | A Moore | | 2 | | Norfolk Schs | Norwich | 9 Jun 18 | |
| 303 | 44.7 | | | 47.01/44.7 | PB | Maddie Bond | | 2 | | City of Portsmouth | Portsmouth | 10 Jun 18 | |
| 303 | 44.7 | | | 44.1 | | Amy Carr | | 2 | | Carlisle Aspatria | Carlisle | 17 Jun 18 | |
| 303 | 44.7 | | | 44.24 | | Kara Sharp | | 2 | | Shetland | Lerwick | 29 Jun 18 | |
| 303 | 44.7 | | | 45.48/44.7 | PB | Madeleine Claydon | | 2 | | Colchester H | Norwich | 8 Jul 18 | |
| 45.48 | | | | | | | | | | Chelmsford | 12 May 18 | |
| 303 | 44.7 | | | 45.09/44.7 | PB | Erin Dillon | | 1 | Ronnie Price | Wirral | Bebington | 21 Jul 18 | |
| 303 | 44.7 | | | 48.00i/44.4 | | Katie Doherty | | 2 | | Liverpool H | Warrington | 19 Aug 18 | |
| 317 | 44.71 | | | 44.21 | | Soraya Crodden | | 2 | Edward Berry | Longwood | Wakefield | 23 May 18 | |
| 318 | 44.72 | | | 44.72 | PB | Neve Evans | | 2 | | Charnwood | Coventry | 19 May 18 | |
| 319 | 44.73 | | | 42.84 | | Niamy Day | | 1 | | Stevenage & North Herts | Hemel Hempstead | 9 Jun 18 | |
| 319 | 44.73 | | | 44.73 | PB | Isabelle Humphreys | | 2 | | Crawley | Crawley | 25 Jul 18 | |
| 321 | 44.74 | | | 44.74 | PB | Zara English | | 1 | Dean Exton | Dorchester | Exeter | 8 Jul 18 | |
| 322 | 44.76 | | | 44.76 | PB | Alexandra Murgatroyd | | 2 | | Rugby & Northampton | Nuneaton | 12 May 18 | |
| 323 | 44.77 | | | 44.77 | PB | Milly Tinsley | | 1 | Carl Foster | Wigan & District | Stretford | 28 May 18 | |
| 323 | 44.77 | | | 44.77 | PB | Dee Bevan | | 2 | | Rotherham | Doncaster | 21 Jul 18 | |
| 325 | 44.78 | | | 44.66 | | Amelia Riggott | | 1 | | Tavistock | Birmingham | 3 Jul 18 | |
| 326 | 44.8 | | | 42.85i | | Lucy Robinson | | 2 | Joe Frost | Stockport | Macclesfield | 12 May 18 | |
| 326 | 44.8 | | | 44.8 | PB | Lara Goodburn | | 2 | | Sleaford | Norwich | 16 Jun 18 | |
| 326 | 44.8 | | | 44.11i | | Jacey Shillito | | 1 | Veronica Boden | Wombwell | Spinkhill | 16 Jun 18 | |
| 326 | 44.8 | | | 45.34/44.8 | PB | Lily Johnson | | 2 | | Guildford & Godalming | Poole | 17 Jun 18 | |
| 45.34 | | | | | | | | | | Bracknell | 3 Jun 18 | |
| 326 | 44.8 | | | 44.22/44.1 | | Carmen Brooks | | 1 | | City of York | Cleckheaton | 21 Jul 18 | |
| 46.04 | | | | | | | | | | York | 1 Sep 18 | |
| 331 | 44.82 | | | 43.25 | | Ruby Green | | 1 | | Bedford & County | Sandy | 29 Sep 18 | |
| 332 | 44.83 | | | 44.83 | PB | Millie Parker | | 2 | Eliska Binks | Charnwood | Loughborough | 30 May 18 | |
| 332 | 44.83 | | | 44.83 | PB | Abbie Chisholm | | 2 | Steven Alan Thompson | Pitreavie | Grangemouth | 29 Jul 18 | |
| 332 | 44.83 | | | 42.99 | | Eve Walley | | 1 | Nick Marley | Guernsey | Lee Valley | 11 Aug 18 | |
| 335 | 44.85 | | | 43.52 | | Delphine Lehrfreund | | 2 | | Stevenage & North Herts | Stevenage | 2 Sep 18 | |
| 336 | 44.86 | | | 44.47 | | Katie Keiller | | 1 | | Guildford & Godalming | Kingston | 13 May 18 | |
| 337 | 44.87 | | | 44.87/44.6 | PB | Cecilia Reid | | 2 | | Blaydon | Hexham | 15 Jul 18 | |
| 338 | 44.89 | | | 43.43 | | Jersey Jones | | 1 | Jason Michael Quirke | Bridgend | Cardiff | 14 Jul 18 | |
| 339 | 44.90 | i | | 44.76 | | Lucy Thomson | | 1 | | Team East Lothian | Emirates Arena | 1 Dec 18 | |
| 340 | 44.9 | | | 45.95/44.9 | PB | Ella Watson | | 1 | | Livingston | Grangemouth | 23 Jun 18 | |
| 46.76 | i | | | | | | | | | Emirates Arena | 11 Mar 18 | |
| 340 | 44.9 | | | 44.6 | | Sebastienna Bairstow | | 1 | Scott Bairstow | Keighley & Craven | Wakefield | 24 Jun 18 | |
| 340 | 44.9 | | | 46.71i/44.9 | PB | Grace Brown | | 2 | Peter Crook | Preston | Litherland | 30 Jun 18 | |
| 340 | 44.9 | | | 45.70/44.9 | PB | Chloe Flight | | 2 | | Hereford | Newport | 30 Jun 18 | |
| 45.70 | | | | | | | | | | Hereford | 5 May 18 | |
| 340 | 44.9 | | | 44.00 | | Amy Hughes | | 2 | | Crawley | Croydon | 21 Jul 18 | |
| 45.21 | | | | | | | | | | Crawley | 9 Jun 18 | |
| 340 | 44.9 | | | 45.77/44.9 | PB | Isabelle Nero | | 2 | Deborah Keenleyside | Chiltern | Croydon | 21 Jul 18 | |
| 45.93 | | | | | | | | | | Horspath | 12 May 18 | |
| 346 | 44.91 | | | 44.91 | PB | Masee Sanusi | | 1 | | Essex Schs | Chelmsford | 9 Jun 18 | |
| 347 | 44.94 | | | 44.80 | | Emily Grace | | 1 | | Newport H | Brecon | 11 Jul 18 | |
| 348 | 44.98 | | | 44.63/44.3 | | Lily Amor | | 1 | | Yeovil | Birmingham | 3 Jul 18 | |
| 349 | 45.00 | | | 45.00 | PB | Emily Rycroft | | 1 | | Notts | Stoke Gifford | 21 Jul 18 | |
| 350 | 45.0 | | | 45.0 | PB | Alanah Lindsay | | 1 | | City of Portsmouth | Portsmouth | 1 Apr 18 | |
| 350 | 45.0 | | | 45.79/45.0 | PB | Emma Kendal | | 2 | | Carlisle Aspatria | Carlisle | 9 Jun 18 | |
| 45.79 | | | | | | | | | | Gateshead | 16 Jun 18 | |
| 350 | 45.0 | | | 45.52/45.0 | PB | Katy Mannix | | 2 | | Silson | Corby | 9 Jun 18 | |
| 45.52 | | | | | | | | | | Birmingham | 16 Jun 18 | |
| 350 | 45.0 | | | 41.8 | | Ella Greenway | | 1 | Joanna Evans | Cleethorpes | Wakefield | 24 Jun 18 | |
| 350 | 45.0 | | | 47.17i/45.0 | PB | Freya Jury | | 2 | Andrew Scoones | Swale Combined | Ashford | 8 Jul 18 | |
| 350 | 45.0 | | | 45.0 | PB | Megan Hulbert | | 1 | David Callaway | Southampton | Hornchurch | 21 Jul 18 | |
| 350 | 45.0 | | | 45.0 | PB | Maddy Sinha | | 2 | | Dorset Schs | Poole | 27 Jul 18 | |
| 357 | 45.01 | | | 44.87 | | Isla Manning | | 2 | | Dundee Hawkhill | Aberdeen | 17 Jun 18 | |
| 358 | 45.03 | i | | 43.31 | | Eliz O'Donnell | | 2 | Iain Presnell | Tonbridge | Lee Valley | 7 Jan 18 | |
| 358 | 45.03 | | | 44.03 | | Anisa Hamilton | | 1 | Catherine Muth | Birchfield H | Nuneaton | 12 May 18 | |
| 360 | 45.07 | | | 42.26/42.2 | | Gabriella Thoburn | | 1 | Grant Brown | South London | Kingston | 13 May 18 | |
| 360 | 45.07 | | | 42.89/42.0 | | Sophie Cowey | | 1 | | City of Salisbury | Tidworth | 13 May 18 | |
| 360 | 45.07 | | | 45.07 | PB | Erika Jarrett | | 2 | Kevin Williams | Newport H | Newport | 28 Jul 18 | |
| 363 | 45.09 | | | 45.09 | PB | Hannah Hamilton-Meikle | | 2 | James Wilson | Team East Lothian | Grangemouth | 12 May 18 | |
| 364 | 45.10 | | | 44.63 | | Maddie Wilson | | 2 | | Edinburgh AC | Scotstoun | 17 Jun 18 | |
| 365 | 45.1 | | | 42.78i | | Nikita Gotthardt-Mills | | 2 | Paul Gripton | Bromsgrove & Redditch | Stourport | 8 Apr 18 | |
| 365 | 45.1 | | | 45.68/45.0 | | Eden Harrison | | 2 | | City of Norwich | Norwich | 12 May 18 | |
| 45.99 | i | | | | | | | | | Lee Valley | 21 Jan 18 | |
| 365 | 45.1 | | | 44.80/43.8 | | Poppy Elton | | 1 | Geoff Aston | Worcester | Worcester | 19 May 18 | |
| 45.70 | | | | | | | | | | Banbury | 24 Jun 18 | |
| 365 | 45.1 | | | 45.15/45.0 | | Anna Dalglish | | 2 | | Fife | Perth | 27 May 18 | |
| 365 | 45.1 | | | 43.86/43.5 | | Isobel Alexander | | 1 | | Ipswich | Basildon | 3 Jun 18 | |
| 365 | 45.1 | | | 45.07/44.0 | | Flo Brill | | 2 | Russell Prosser | Nene Valley | Peterborough | 3 Jun 18 | |
| 46.23 | | | | | | | | | | Peterborough | 12 May 18 | |
| 365 | 45.1 | | | 43.30 | | Beth Turton | | 2 | | St. Mary's Richmond | Wormwood Scrubs | 17 Jun 18 | |
| 365 | 45.1 | | | 44.81/44.2 | | Flora Miskin-Young | | 2 | John Skevington | Wreake & Soar Valley | Banbury | 24 Jun 18 | |
| 45.78 | | | | | | | | | | Warwick | 2 May 18 | |
| 365 | 45.1 | | | 45.40/45.1 | PB | Libby Hawkswell | | 2 | | Kidderminster & Stourport | Banbury | 24 Jun 18 | |
| 45.40 | | | | | | | | | | Worcester | 8 Jul 18 | |
| 365 | 45.1 | | | 45.1 | PB | Eugenia Mutero | | 2 | | Oxford City | Swindon | 1 Jul 18 | |
| 365 | 45.1 | | | 41.75 | | Amber Bailey | | 1 | Les Rayment | Bracknell AC | Basingstoke | 8 Jul 18 | |
| 46.14 | | | | | | | | | | Bracknell | 3 Jun 18 | |
| 376 | 45.12 | | | 45.12 | PB | Anna Young | | 2 | Dudley Walker | Giffnock North | Grangemouth | 9 Jun 18 | |
| 376 | 45.12 | | | 45.12 | PB | Michelle Okorie | | 1 | | Crawley | Kingston | 9 Jun 18 | |
| 376 | 45.12 | | | 41.10 | | Ruby Brook | | 1 | Mark Wanklyn | Stroud | Exeter | 22 Jul 18 | |
| 379 | 45.13 | | | 45.13 | PB | Marian Owusuwaah | | 2 | | Cambridge H | Battersea | 21 Apr 18 | |
| 379 | 45.13 | | | 45.10 | | Jessica Lorimer | | 1 | | Edinburgh AC | Grangemouth | 26 Aug 18 | |
| 381 | 45.15 | | | 45.15 | PB | Pippa Spawforth | | 2 | | Guildford & Godalming | Kingston | 9 Jun 18 | |
| 382 | 45.16 | | | 43.76 | | Ella McGregor | | 1 | | Giffnock North | Kilmarnock | 12 Jun 18 | |
| 383 | 45.17 | | | 45.17 | PB | Maravilla Ezekwuka | | 2 | | Sutton & District | Kingston | 13 May 18 | |
| 384 | 45.19 | | | 45.19 | PB | Daisy Bloxham | | 2 | | Guildford & Godalming | Kingston | 13 May 18 | |
| 385 | 45.2 | | | 45.2 | PB | Freya Brannigan | | 2 | | Winchester | Winchester | 8 Apr 18 | |
| 385 | 45.2 | | | 44.69i | | Claudia Turnell | | 2 | | Hallamshire | Rotherham | 22 Apr 18 | |
| 385 | 45.2 | | | 47.22/45.2 | PB | Olivia Nelsey | | 2 | | Goole Youth | Grimsby | 19 May 18 | |
| 385 | 45.2 | | | 45.2 | PB | Lorna Coull | | 1 | | West Suffolk | Peterborough | 3 Jun 18 | |
| 385 | 45.2 | | | 45.78i/45.0 | | Lara Scott-Rule | | 2 | Andrew Fisher | Southampton | Southampton | 6 Jun 18 | |
| 46.00 | | | | | | | | | | Bromley | 19 May 18 | |
| 385 | 45.2 | | | 43.36i | | Amelia Briggs-Goode | | 2 | Cameron Sealy | Notts | Rugby | 17 Jun 18 | |
| 385 | 45.2 | | | 46.42/45.2 | PB | Mollie Bakewell | | 2 | | Longwood | Wakefield | 24 Jun 18 | |
| 46.42 | | | | | | | | | | Wakefield | 23 May 18 | |
| 385 | 45.2 | | | 45.2 | PB | Ella Crowe | | 1 | Gordon Crowe | Northern (Isle of Man) | Douglas | 7 Jul 18 | |
| 385 | 45.2 | | | 43.93 | | Kate Salthouse | | 2 | | Tynedale | Whitley Bay | 15 Jul 18 | |
| 385 | 45.2 | | | 42.55 | | Manon Baines | | 1 | Conrad Kalinowski | St. Mary's Richmond | Hemel Hempstead | 21 Jul 18 | |
| 395 | 45.21 | i | | 44.82 | | Charlotte Price | | 2 | Gareth Weir | Bracknell AC | Lee Valley | 2 Dec 18 | |
| 46.27 | | | | | | | | | | Reading | 17 Jun 18 | |
| 46.4 | | | | | | | | | | Basingstoke | 6 Jun 18 | |
| 396 | 45.22 | | | 45.22 | PB | Olivia Barker | | 2 | | Surrey Schs | Kingston | 9 Jun 18 | |
| 397 | 45.25 | | | 45.25 | PB | Ella Griffin | | 2 | Paul Nash | Wycombe | Horspath | 23 May 18 | |
| 397 | 45.25 | | | 45.25 | PB | Mimi Light | | 2 | | Middlesex Schs | Hendon | 9 Jun 18 | |
| 397 | 45.25 | | | 45.25 | PB | Omoteniade Olisa | | 2 | | Cambridge H | Eltham | 17 Jun 18 | |
| 400 | 45.26 | | | 44.27 | | Ava Sparham | | 1 | | Basildon | Chelmsford | 12 May 18 | |
| 401 | 45.27 | | | 44.28 | | Jenny Swandale | | 1 | | Thanet RR | Bromley | 6 May 18 | |
| 402 | 45.28 | i | | 42.55 | | Seren Rodgers | | 2 | Steve Shaw | Taunton | Cardiff | 2 Dec 18 | |
| 45.62 | | | | | | | | | | Exeter | 8 Jul 18 | |
| 403 | 45.29 | | | 45.29 | PB | Shana Stewardson | | 2 | Dave Stock | Bridgnorth | Tipton | 19 Jun 18 | |
| 403 | 45.29 | | | 44.74 | | Tiffany Rees | | 1 | | Swansea | Swansea | 19 Aug 18 | |
| 405 | 45.30 | | | 45.30 | PB | Abigail Thwaites | | 1 | | Birtley | Jarrow | 23 May 18 | |
| 406 | 45.3 | | | 45.3 | PB | Isabelle Cunningham | | 1 | Andy Bibby | Rossendale | Preston | 28 Apr 18 | |
| 406 | 45.3 | | | 45.3 | PB | Melissa Ince | | 1 | Margaret Galvin | Leigh | Litherland | 19 May 18 | |
| 406 | 45.3 | | | 46.29/45.3 | PB | Lottie Warkcup | | 2 | Leanne Wellings | Wycombe | Mile End | 19 May 18 | |
| 46.29 | | | | | | | | | | Little Marlow | 15 Apr 18 | |
| 406 | 45.3 | | | 46.81/44.4 | | Saskia Birt | | 2 | James McDonald | Herne Hill | Tooting Bec | 19 May 18 | |
| 406 | 45.3 | | | 45.3 | PB | Sarris Teale | | 2 | Derek Laws | Ashford AC | Walthamstow | 19 May 18 | |
| 406 | 45.3 | | | 45.3 | PB | Megan Lewis | | 2 | | Blackpool, Wyre & Fylde | Hyndburn | 26 May 18 | |
| 406 | 45.3 | | | 45.90/45.2 | | Danielle Parkes | | 2 | | Kidderminster & Stourport | Worcester | 9 Jun 18 | |
| 45.90 | | | | | | | | | | Birmingham | 16 Jun 18 | |
| 406 | 45.3 | | | 43.98 | | Kelly-Marie Marsh | | 1 | John Dill | Swindon | Woking | 10 Jun 18 | |
| 45.58 | | | | | | | | | | Exeter | 22 Jul 18 | |
| 406 | 45.3 | | | 44.83 | | Lily Middleton | | 1 | | Team East Lothian | Grangemouth | 23 Jun 18 | |
| 45.60 | | | | | | | | | | Meadowmill | 1 Sep 18 | |
| 406 | 45.3 | | | 44.22/43.7 | | Hannah Lownsbrough | | 2 | Paul Gripton | Bromsgrove & Redditch | Rugby | 24 Jun 18 | |
| 406 | 45.3 | | | 46.38/45.3 | PB | Emily Reynolds | | 2 | | Preston | Litherland | 30 Jun 18 | |
| 406 | 45.3 | | | 45.3 | PB | Kea Powlette | | 1 | | Chelmsford | Gateshead | 7 Jul 18 | |
| 406 | 45.3 | | | 45.3 | PB | Tianna Campbell | | 2 | | Harrow | Hemel Hempstead | 21 Jul 18 | |
| 406 | 45.3 | | | 45.3 | PB | Ashia Wilson | | 2 | Mark Pauley | Poole AC | Poole | 27 Jul 18 | |
| 406 | 45.3 | | | 44.36 | | Grace French | | 1 | | Basingstoke & Mid Hants | Eton | 1 Sep 18 | |
| 46.20 | | | | | | | | | | Basingstoke | 9 Sep 18 | |
| 421 | 45.32 | i | | 44.40i | | Ellina Connor | | 2 | Andrew Wood | Trafford | Sportcity | 7 Jan 18 | |
| 45.33 | | | | | | | | | | Stretford | 2 Apr 18 | |
| 421 | 45.32 | i | | 45.32i/43.5 | PB | Samantha Dagg | | 1 | Bruce Scott | Tweed, Leader, Jed Track | Emirates Arena | 13 Jan 18 | |
| 45.74 | | | | | | | | | | Meadowmill | 8 Apr 18 | |
| 421 | 45.32 | | 0.7 | 45.32 | PB | Evelyne Fonteyne | | 2 | Ty Holden | Shaftesbury Barnet | Lee Valley | 13 May 18 | |
| 421 | 45.32 | | | 43.82 | | Holly Waugh | | 1 | Lee Cleary-Morgan | North Shields Poly | Whitley Bay | 20 May 18 | |
| 425 | 45.33 | | | 45.33 | PB | Jennifer Gaul | | 2 | | Harrow | Bedford | 21 Apr 18 | |
| 425 | 45.33 | | | 44.97 | | Charli Sampson | | 1 | | Charnwood | Loughborough | 30 May 18 | |
| 425 | 45.33 | | | 44.81 | | Jenny Scott | | 2 | | Helensburgh | Grangemouth | 17 Jun 18 | |
| 428 | 45.34 | i | | 45.22/45.1 | | Lauren Barclay | | 2 | | Falkirk | Emirates Arena | 11 Mar 18 | |
| 45.73 | | | | | | | | | | Grangemouth | 12 May 18 | |
| 47.0 | | | | | | | | | | Grangemouth | 15 Sep 18 | |
| 428 | 45.34 | | | 45.34 | PB | Carly York | | 1 | Daniel Brooker | Brighton & Hove | Crawley | 12 May 18 | |
| 428 | 45.34 | | | 43.72 | | Niamh Rushton | | 1 | | Nene Valley | Hull | 12 May 18 | |
| 431 | 45.35 | | | 45.21 | | Lizzie Elderfield | | 1 | | Exeter | Exeter | 9 Jun 18 | |
| 432 | 45.37 | i | | 45.37i | PB | Eleanor Noblet | | 2 | Gary Tunstall | Preston | Sportcity | 16 Dec 18 | |
| 433 | 45.38 | | | 44.62/44.6 | | Bella Digby | | 1 | Claire East | City of Portsmouth | Basingstoke | 9 Jun 18 | |
| 433 | 45.38 | i | | 45.38i | PB | Sophie Lisk | | 1 | | Cardiff Archers | Cardiff | 2 Dec 18 | |
| 435 | 45.40 | | | 45.40 | PB | Sara Sardi | | 1 | Cathy James | Thurrock | Chelmsford | 9 Jun 18 | |
| 435 | 45.40 | | | 45.40 | PB | Libby Ellis | | 2 | | Dartford H | Dartford | 30 Sep 18 | |
| 437 | 45.4 | | | 45.4 | PB | Francesca Young | | 2 | | Team Kennet | Horspath | 15 Apr 18 | |
| 437 | 45.4 | | | 43.87 | | Freya Higginbottom | | 1 | Susan Deane | Havering | Ipswich | 6 May 18 | |
| 45.69 | | | | | | | | | | Bracknell | 21 Apr 18 | |
| 437 | 45.4 | | | 45.4 | PB | Laura Brown | | 1 | | Barrow & Furness | Lancaster | 7 May 18 | |
| 437 | 45.4 | | | 45.4 | PB | Lucy Tickle | | 2 | Stan Taylor | Blackpool, Wyre & Fylde | Blackburn | 12 May 18 | |
| 437 | 45.4 | | | 43.7 | | Iris Downes | | 1 | Colin Lancaster | Shrewsbury | Telford | 12 May 18 | |
| 437 | 45.4 | | | 45.4 | PB | Beatrice Chappell | | 2 | Darren Middleton | Barnsley AC | Grimsby | 19 May 18 | |
| 437 | 45.4 | | | 44.94 | | Isabella Colwell | | 2 | | Yeovil | Bournemouth | 9 Jun 18 | |
| 437 | 45.4 | | | 43.40i | | Amanda Ofori-Amoako | | 2 | | Saffron AC | Banbury | 17 Jun 18 | |
| 437 | 45.4 | | | 45.42i/45.4 | PB | Hannah Steel | | 2 | | Lothian | Grangemouth | 23 Jun 18 | |
| 46.40 | i | | | | | | | | | Emirates Arena | 27 Jan 18 | |
| 437 | 45.4 | | | 43.69 | | Eden Williams | | 2 | Arwyn Davies | Cardiff | Newport | 30 Jun 18 | |
| 46.13 | | | | | | | | | | Newport | 28 Jul 18 | |
| 437 | 45.4 | | | 45.4 | PB | Vanessa Ankomah | | 1 | | Banbury | Banbury | 12 Aug 18 | |
| 437 | 45.4 | | | 45.58i/45.4 | PB | Alesha Azonubi | | 2 | | Preston | Preston | 15 Sep 18 | |
| 449 | 45.41 | | | 44.37i | | Naomi Toft | | 2 | Phillip Kissi | Blackheath & Bromley | Tooting Bec | 7 May 18 | |
| 450 | 45.42 | i | | 43.63i | | Amy Kennedy | | 2 | Colin Sinclair | Cumbernauld | Emirates Arena | 13 Jan 18 | |
| 451 | 45.45 | i | | 45.45i | PB | Jilly Lefebvre | | 2 | | North Ayrshire | Emirates Arena | 27 Jan 18 | |
| 451 | 45.45 | | | 44.77 | | Charlie Yates | | 2 | | Amber Valley & Erewash | Ilkeston | 22 Sep 18 | |
| 453 | 45.46 | i | | 45.46i | PB | Sophie Davies | | 1 | | Cardiff Archers | Cardiff | 2 Dec 18 | |
| 454 | 45.47 | | | 44.33 | | Kaitlyn Auton | | 2 | | Gateshead | Sheffield | 21 Apr 18 | |
| 454 | 45.47 | | | 45.47 | PB | Moli Watts | | 2 | Paul Hill | Cardiff Archers | Cardiff Met | 3 Jun 18 | |
| 456 | 45.48 | | | 45.48 | PB | Ella Jackson | | 2 | Phillip Warwicker | Cardiff Archers | Cardiff | 14 Jul 18 | |
| 457 | 45.49 | | | 44.37/43.8 | | Poppy Edwards | | 1 | | Radley | Horspath | 12 May 18 | |
| 457 | 45.49 | | | 45.49 | PB | Baillie Nesbitt | | 2 | | Essex Schs | Chelmsford | 9 Jun 18 | |
| 459 | 45.50 | | | 44.05 | | Olivia Roe | | 2 | Paul Wilson | Wakefield | York | 7 May 18 | |
| 459 | 45.50 | | | 45.50 | PB | Emily Dillamore | | 2 | Richard Jackson | Camberley | Bracknell | 3 Jun 18 | |
| 459 | 45.50 | | | 45.50 | PB | Jessica Dutton | | 1 | Gill St Barbe | North Devon | Braunton | 10 Jun 18 | |
| 462 | 45.5 | | | 45.5 | PB | Bronwyn Yeandle | | 2 | Derek Laws | Ashford AC | Ashford | 21 Apr 18 | |
| 462 | 45.5 | | | 45.5 | PB | Anna Thomas | | 2 | | Camberley | Walton | 21 Apr 18 | |
| 462 | 45.5 | | | 45.01 | | Abigail Howard | | 1 | Matt Cullen | Bury | Litherland | 19 May 18 | |
| 462 | 45.5 | | | 45.54i/44.3 | | Isobelle Herbert | | 2 | | Gloucester | Yate | 1 Jul 18 | |
| 462 | 45.5 | | | 46.51/45.5 | PB | Josie Carter | | 2 | | Team Bath | Yate | 1 Jul 18 | |
| 46.51 | | | | | | | | | | Yate | 12 May 18 | |
| 462 | 45.5 | | | 44.60/44.1 | | Sophie Nugent | | 1 | | Basildon | Brighton | 21 Jul 18 | |
| 47.00 | i | | | | | | | | | Lee Valley | 2 Dec 18 | |
| 468 | 45.51 | | | 45.51 | PB | Kirsty MacLean | | 2 | | Stornoway | Grangemouth | 9 Jun 18 | |
| 469 | 45.53 | | | 44.29 | | Jessica Hatch | | 1 | Shireen Higgins | Bracknell AC | Bromley | 19 May 18 | |
| 469 | 45.53 | | | 45.53 | PB | Romy Nolan | | 2 | | Reading AC | Bracknell | 3 Jun 18 | |
| 471 | 45.55 | | | 45.23 | | Hermione Ford | | 1 | Stuart Flack | Guildford & Godalming | Birmingham | 3 Jul 18 | |
| 472 | 45.57 | | | 44.51 | | Abi Oshodi | | 2 | | Team East Lothian | Grangemouth | 29 Jul 18 | |
| 473 | 45.58 | | | 44.21i/42.3 | | Sophie Evans | | 1 | Thomas McTaggart | Larkhall | Meadowmill | 6 May 18 | |
| 473 | 45.58 | i | | 45.58i | PB | Sylvie Plaskow | | 2 | Phillip Kissi | Blackheath & Bromley | Lee Valley | 2 Dec 18 | |
| 475 | 45.6 | | | 44.2 | | Madeleine Mayes | | 1 | Bill Boyd | Corby | Corby | 27 Mar 18 | |
| 475 | 45.6 | | | 46.16/45.6 | PB | Madison Powell | | 2 | | Cwmbran | Braunton | 21 Apr 18 | |
| 475 | 45.6 | | | 46.48/45.6 | PB | Renee Bassin | | 2 | Kim Milnthorpe | Horsham Blue Star | Horsham | 1 Jun 18 | |
| 46.48 | | | | | | | | | | Crawley | 1 Apr 18 | |
| 475 | 45.6 | | | 45.74/45.1 | | Imogen Tattersall | | 2 | Shireen Higgins | Windsor Slough Eton & Hounslow | Reading | 9 Jun 18 | |
| 46.66 | | | | | | | | | | Eton | 13 May 18 | |
| 475 | 45.6 | | | 45.6 | PB | Faith Chen | | 2 | Liz McColgan | Croydon | Portsmouth | 17 Jun 18 | |
| 475 | 45.6 | | | 45.6 | PB | Danni Sinclair | | 2 | | Bristol & West | Yate | 1 Jul 18 | |
| 475 | 45.6 | | | 46.80/45.6 | PB | Carlie Dinham | | 1 | | Basildon | Gateshead | 7 Jul 18 | |
| 46.80 | | | | | | | | | | Chelmsford | 9 Jun 18 | |
| 475 | 45.6 | | | 45.6 | PB | Emma Farrington | | 1 | | Crewe & Nantwich | Bangor | 21 Jul 18 | |
| 475 | 45.6 | | | 46.33/45.6 | PB | Freya Bonell | | 1 | | Cornwall AC | Carn Brea | 9 Sep 18 | |
| 46.33 | | | | | | | | | | Exeter | 8 Jul 18 | |
| 484 | 45.61 | | | 44.50 | | Annabelle Martin | | 2 | | Edinburgh AC | Grangemouth | 20 May 18 | |
| 484 | 45.61 | | | 44.84 | | Kirsten Bowie | | 1 | Scott Hamilton | Elgin | Inverness | 27 May 18 | |
| 486 | 45.63 | | | 45.63 | PB | Mary Rose Cairns | | 2 | | Giffnock North | Kilmarnock | 12 May 18 | |
| 487 | 45.64 | i | | 44.79 | | Valentina Sharpe | | 2 | | Victoria Park & Tower Hamlets | Lee Valley | 18 Mar 18 | |
| 45.7 | | | | | | | | | | Mile End | 19 May 18 | |
| 45.97 | | | | | | | | | | Bedford | 21 Apr 18 | |
| 488 | 45.65 | | | 45.65 | PB | Emilia Sprostranova | | 1 | | Crawley | Crawley | 12 May 18 | |
| 489 | 45.66 | i | | 45.66i | PB | Ellie-Mae Wainwright | | 2 | Darryn McAtee | Newport H | Cardiff | 2 Dec 18 | |
| 46.78 | | | | | | | | | | Newport | 28 Jul 18 | |
| 490 | 45.69 | | 0.7 | 45.69 | PB | Daisy Burns | | 2 | | Ealing Southall & Middx | Lee Valley | 13 May 18 | |
| 490 | 45.69 | | | 45.69 | PB | Rosie Sharples | | 2 | Bryan Roy | Falkirk | Meadowmill | 26 Jun 18 | |
| 492 | 45.70 | | | 45.70 | PB | S Galbraith | | 2 | | Essex Schs | Chelmsford | 9 Jun 18 | |
| 493 | 45.7 | | | 45.78/45.4 | | Caitlin Keaney | | 1 | Martin Gray | Cornwall AC | Par | 7 Apr 18 | |
| 45.78 | | | | | | | | | | Exeter | 8 Jul 18 | |
| 493 | 45.7 | | | 46.34/45.7 | PB | Lauren Frodsham | | 1 | | Wigan & District | Leigh | 21 Apr 18 | |
| 46.34 | | | | | | | | | | Wigan | 8 Apr 18 | |
| 493 | 45.7 | | | 49.66/45.7 | PB | Lizzy Harrison | | 1 | | Huntingdonshire | St. Ives | 29 Apr 18 | |
| 493 | 45.7 | | | 46.39/45.7 | PB | Caitlin Elliott | | 2 | | Sutton-in-Ashfield | Grantham | 19 May 18 | |
| 46.39 | | | | | | | | | | Derby | 21 Apr 18 | |
| 493 | 45.7 | | | 45.7 | PB | Lea Devecsery | | 1 | | Dorset Schs | Bournemouth | 9 Jun 18 | |
| 493 | 45.7 | | | 45.7 | PB | Chelsea Bolrey | | 2 | | Durham Schs | Jarrow | 9 Jun 18 | |
| 493 | 45.7 | | | 45.7 | PB | Millie Reeve | | 2 | | City of Salisbury | Swindon | 9 Jun 18 | |
| 493 | 45.7 | | | 45.7 | PB | Millie Nunn | | 2 | | South Glos | Yate | 1 Jul 18 | |
| 493 | 45.7 | | | 45.7 | PB | Martha Camm | | 2 | | Southend | Gateshead | 7 Jul 18 | |
| 493 | 45.7 | | | 43.74/43.6 | | Mia Bailey | | 1 | Keith Yellop | City of Norwich | Norwich | 8 Jul 18 | |
| 503 | 45.71 | | | 44.66 | | Sophie Moore | | 2 | | Avon Valley | Eton | 25 Mar 18 | |
| 503 | 45.71 | | | 44.50 | | Vienna Blair | | 1 | | Birchfield H | Nuneaton | 12 May 18 | |
| 503 | 45.71 | | | 45.71 | PB | Brooke Long | | 1 | | Leeds City | Wakefield | 19 May 18 | |
| 506 | 45.72 | | | 45.72 | PB | Gemma Newport | | 2 | Spencer Newport | Charnwood | Loughborough | 30 May 18 | |
| 507 | 45.73 | | | 45.73 | PB | Katie Beel | | 2 | Gareth Beggan | Whitemoss | Livingston | 20 Jun 18 | |
| 508 | 45.75 | | 0.0 | 43.97 | | Nell Tolley | | 2 | | Hallamshire | Derby | 28 Jul 18 | |
| 509 | 45.76 | | | 45.76 | PB | Isabel Bull | | 2 | | Guildford & Godalming | Bracknell | 3 Jun 18 | |
| 510 | 45.77 | | | 45.77 | PB | Anna Jamieson | | 1 | | Horsham Blue Star | Crawley | 12 May 18 | |
| 510 | 45.77 | | | 45.77 | PB | Moli Lyons | | 2 | Arwyn Davies | Cardiff | Brecon | 25 Aug 18 | |
| 512 | 45.78 | | | 44.61 | | Imogen Tanner | | 2 | Phill Morris | Independent Intelligent Fitness | Tidworth | 13 May 18 | |
| 512 | 45.78 | | | 45.78 | PB | Olivia Kendall | | 1 | | Strathearn | Grangemouth | 4 Jul 18 | |
| 514 | 45.80 | | | 44.23i | | Libby Turbutt | | 1 | Stella Bandu | Ashford AC | Bromley | 6 May 18 | |
| 514 | 45.80 | | | 44.59 | | Emily Churchill | | 1 | | Exeter | Exeter | 8 Jul 18 | |
| 514 | 45.80 | | | 45.80 | PB | Charlotte Jones | | 1 | | Cwmbran | Swansea | 18 Aug 18 | |
| 514 | 45.80 | | | 45.80 | PB | Freya John | | 2 | | Kingston & Poly | Woking | 2 Sep 18 | |
| 518 | 45.8 | | | 43.44 | | Heidi Stillwell | | 2 | | Mendip | Yate | 21 Apr 18 | |
| 518 | 45.8 | | | 46.10/45.8 | PB | Isabelle Fennell | | 2 | | Royal Sutton Coldfield | Sutton Coldfield | 19 May 18 | |
| 46.10 | | | | | | | | | | Nuneaton | 12 May 18 | |
| 518 | 45.8 | | | 44.6 | | Kitty Marvin | | 1 | | Swindon | Swindon | 9 Jun 18 | |
| 518 | 45.8 | | | 45.8 | PB | Pippa Gouldson | | 2 | | Kingston upon Hull | Gateshead | 7 Jul 18 | |
| 518 | 45.8 | | | 47.58/45.8 | PB | Olivia Murphy | | 1 | | Windsor Slough Eton & Hounslow | Basingstoke | 8 Jul 18 | |
| 518 | 45.8 | | | 45.85/44.9 | | Catherine Groves | | 2 | Christopher Jeffery | Cornwall AC | Carn Brea | 9 Sep 18 | |
| 518 | 45.8 | i | | 42.66/42.2 | | Leoni Pye | | 1 | | Middlesbrough (Mandale) | Sheffield | 16 Dec 18 | |
| 525 | 45.81 | i | | 45.32 | | Darcy John-Cook | | 2 | | Cardiff | Cardiff | 10 Feb 18 | |
| 46.13 | | | | | | | | | | Cardiff | 12 May 18 | |
| 46.2 | | | | | | | | | | Bath | 19 May 18 | |
| 526 | 45.82 | | | 45.82 | PB | Isabel Lavender | | 2 | | Mendip | Yeovil | 12 May 18 | |
| 526 | 45.82 | | | 45.82/45.6 | PB | Jessica Daly | | 1 | Nigel Brooks | Tonbridge | Ashford | 13 May 18 | |
| 526 | 45.82 | | | 45.82 | PB | Emilie Harper | | 2 | | Berkshire Schs | Birmingham | 3 Jul 18 | |
| 529 | 45.85 | | | 45.80 | | Eva Fitzpatrick | | 2 | | Law | Kilmarnock | 12 May 18 | |
| 529 | 45.85 | | | 45.85 | PB | Libby Currie | | 1 | | Whitemoss | Grangemouth | 4 Jul 18 | |
| 531 | 45.86 | | | 45.41 | | Hannah Noble | | 1 | | Retford | Loughborough | 8 Apr 18 | |
| 531 | 45.86 | | | 45.86/45.8 | PB | Kiera Griffiths | | 1 | | Aberdare Valley | Cardiff | 14 Jul 18 | |
| 533 | 45.87 | i | | 42.38 | | Olivia Brown | | 1 | Norman Poole | Sale Harriers Manchester | Sportcity | 18 Mar 18 | |
| 46.38 | | | | | | | | | | Stretford | 7 May 18 | |
| 534 | 45.88 | | | 45.88 | PB | Erin Pinchbeck | | 1 | | Andover | Portsmouth | 12 May 18 | |
| 535 | 45.90 | | | 45.49 | | Tara Bartlett | | 2 | Paul Miller | Hercules Wimbledon | Battersea | 21 Apr 18 | |
| 535 | 45.90 | | | 45.90 | PB | Emily Thompson | | 2 | | Surrey Schs | Kingston | 9 Jun 18 | |
| 535 | 45.90 | | | 43.73 | | Ruby Saunders | | 1 | | Westbury | Birmingham | 3 Jul 18 | |
| 535 | 45.90 | | | 45.90 | PB | Zara Mitchell | | 2 | | Cornwall AC | Exeter | 8 Jul 18 | |
| 539 | 45.9 | | | 46.05/45.9 | PB | Mar Ruiz-Monserrat | | 2 | | Charnwood | Corby | 13 May 18 | |
| 46.05 | | | | | | | | | | Loughborough | 30 May 18 | |
| 539 | 45.9 | | | 45.9 | PB | Gabrielle Black | | 2 | | Saffron AC | Nuneaton | 19 May 18 | |
| 539 | 45.9 | | | 45.9 | PB | Rose Chesterfield | | 1 | | Winchester | Bournemouth | 3 Jun 18 | |
| 539 | 45.9 | | | 48.29/45.9 | PB | Emily Baird | | 1 | Bryn Percival | Cambridge & Coleridge | Peterborough | 3 Jun 18 | |
| 539 | 45.9 | | | 45.9 | PB | Sophie Ashcroft | | 2 | | Basingstoke & Mid Hants | Basingstoke | 1 Jul 18 | |
| 539 | 45.9 | | | 48.04/45.9 | PB | Hollie Bristow | | 2 | | Goole Youth | York | 12 Aug 18 | |
| 545 | 45.91 | | | 45.91 | PB | Elsa Buchanan | | 2 | Brian Higson | Royal Sutton Coldfield | Loughborough | 13 Jun 18 | |
| 546 | 45.92 | | | 45.88 | | Evie Brooks | | 1 | Gordon Reid | Louth | Hull | 12 May 18 | |
| 547 | 45.93 | | | 43.83 | | Iona Melrose | | 2 | | Swansea | Stoke Gifford | 21 Jul 18 | |
| 547 | 45.93 | | | 45.93/45.9 | PB | Amira Thomas | | 1 | | Medway Phoenix | Woodford | 21 Jul 18 | |
| 549 | 45.94 | | | 45.94 | PB | Amy Hunt | | 1 | Susan Taylor | Wakefield | Wakefield | 23 May 18 | |
| 550 | 45.95 | | | 45.95 | PB | Rachel Anderson | | 2 | Steve Fury | Medway & Maidstone | Ashford | 13 May 18 | |
| 550 | 45.95 | | | 45.86 | | Rosina Orton | | 2 | | Birchfield H | Stoke Gifford | 21 Jul 18 | |
| 552 | 45.97 | | | 45.22 | | Sophie Bath | | 2 | Dave Combe | East Sutherland | Aberdeen | 19 Aug 18 | |
| 553 | 45.98 | | | 44.14 | | Uchema De Silva | | 1 | | Luton | Eton | 25 Mar 18 | |
| 553 | 45.98 | | | 44.88i | | Alanna MacKenzie | | 1 | | Inverness | Inverness | 12 May 18 | |
| 555 | 46.0 | | | 44.99 | | Sophie Brame | | 2 | | City of Portsmouth | Portsmouth | 7 Apr 18 | |
| 555 | 46.0 | | | 47.04/46.0 | PB | Amelia Millington | | 2 | | City of Stoke | Stoke | 21 Apr 18 | |
| 555 | 46.0 | | | 46.06/43.6 | | Jayne Elvin | | 1 | Kelvin Stone | Thurrock | Grays | 6 May 18 | |
| 555 | 46.0 | | | 46.84/46.0 | PB | Naomi Dawson | | 1 | Graham Howell | Yate | Bath | 19 May 18 | |
| 46.84 | | | | | | | | | | Yate | 12 May 18 | |
| 555 | 46.0 | | | 46.91/44.5 | | Anna Guld | | 1 | | Hillingdon | Mile End | 19 May 18 | |
| 46.91 | | | | | | | | | | Bedford | 21 Apr 18 | |
| 555 | 46.0 | | | 48.10/46.0 | PB | Tess Graham | | 2 | | Birtley | Middlesbrough | 20 May 18 | |
| 555 | 46.0 | | | 46.0 | PB | Janais Johnson | | 2 | | Herne Hill | Croydon | 2 Jun 18 | |
| 555 | 46.0 | | | 46.0 | PB | Kiera Dove | | 2 | | Devon Schs | Exeter | 5 Jun 18 | |
| 555 | 46.0 | | | 46.0 | PB | Amelie Thorne | | 2 | | Berkshire Schs | Reading | 9 Jun 18 | |
| 555 | 46.0 | | | 45.15/44.6 | | Poppy Hankinson | | 1 | | Reading AC | Street | 13 Jun 18 | |
| 555 | 46.0 | | | 45.54/45.0 | | Keira Hulks | | 1 | | Thanet AC | Ashford | 8 Jul 18 | |
| 555 | 46.0 | | | 45.42/44.4 | | Angel Acheampong | | 1 | | Thames Valley | Wormwood Scrubs | 21 Jul 18 | |
| 46.28 | | | | | | | | | | Battersea | 21 Apr 18 | |
| 555 | 46.0 | | | 45.03/44.8 | | Molly White | | 1 | Dean Exton | Dorchester | Swindon | 16 Sep 18 | |
| 568 | 46.01 | | | 46.01/44.2 | PB | Lola Pinnock | | 2 | John Smith | Sheffield & Dearne | Sheffield | 17 Jun 18 | |
| 569 | 46.02 | | | 46.02 | PB | Erin Huddleston | | 1 | | Cookham | Little Marlow | 15 Apr 18 | |
| 570 | 46.03 | | | 45.61/44.4 | | Emily Gillespie | | 2 | | Chiltern | Horspath | 12 May 18 | |
| 571 | 46.06 | | | 46.06 | PB | Mhairi Chalmers | | 1 | | Kilmarnock | Kilmarnock | 12 May 18 | |
| 571 | 46.06 | i | | 43.11 | | Brogan McCafferty | | 2 | Lesley Pearson | Cookham | Lee Valley | 2 Dec 18 | |
| 573 | 46.07 | | | 46.07 | PB | Emily Russell | | 2 | Duncan Mason | Salford H | Stretford | 28 May 18 | |
| 574 | 46.1 | | | 45.52 | | Anise Mellodey | | 1 | | New Forest Junior | Bournemouth | 25 Mar 18 | |
| 46.24 | | | | | | | | | | Tidworth | 13 May 18 | |
| 574 | 46.1 | | | 46.1 | PB | Annelie M'Hand | | 2 | | Tavistock | Plymouth | 1 Apr 18 | |
| 574 | 46.1 | | | 46.85/45.3 | | Amelie Mason | | 1 | | Braintree | Stevenage | 15 Apr 18 | |
| 574 | 46.1 | | | 48.35/45.1 | | Emilia Chittenden | | 2 | | Kingston & Poly | Horsham | 19 May 18 | |
| 574 | 46.1 | | | 47.87/45.6 | | Kaia Peiris | | 2 | Michael Utting | City of Norwich | Norwich | 9 Jun 18 | |
| 574 | 46.1 | | | 46.55/46.1 | PB | Abigail Cottam | | 2 | | Bridgnorth | Telford | 9 Jun 18 | |
| 46.55 | | | | | | | | | | Birmingham | 22 Apr 18 | |
| 574 | 46.1 | | | 45.78/44.6 | | Kerrie Shanley | | 1 | | Newquay & Par | Carn Brea | 9 Sep 18 | |
| 46.96 | | | | | | | | | | Exeter | 8 Jul 18 | |
| 581 | 46.11 | i | | 45.37 | | Alice Matthews | | 1 | | Bristol & West | Cardiff | 2 Dec 18 | |
| 582 | 46.12 | | | 46.12 | PB | Georgia Davies | | 2 | Stephen Cottle | Torbay | Exeter | 8 Jul 18 | |
| 583 | 46.13 | | | 46.13 | PB | Rose Shadbolt | | 2 | | Hampshire Schs | Basingstoke | 9 Jun 18 | |
| 584 | 46.14 | | | 46.14 | PB | Elle Grace Hinchliffe | | 2 | Rudolph Paul Hohn | Sheffield & Dearne | Sheffield | 21 Apr 18 | |
| 585 | 46.15 | | 0.9 | 45.29 | | Carys Dickinson | | 2 | | Swansea | Neath | 3 Jun 18 | |
| 586 | 46.16 | | | 46.16 | PB | Tolulope Adebayo | | 1 | | Marshall Milton Keynes | Coventry | 19 May 18 | |
| 586 | 46.16 | | | 46.16 | PB | Joanna Bingham | | 2 | James Wardman | Rothwell | Wakefield | 23 May 18 | |
| 588 | 46.17 | | | 45.39 | | Georgia Russell | | 2 | | Walton | Kingston | 13 May 18 | |
| 589 | 46.18 | | | 44.82 | | Annabelle Ita | | 1 | | Derby | Derby | 2 Jun 18 | |
| 590 | 46.19 | | | 46.19 | PB | Ffion Windsor | | 1 | | Cardiff | Yate | 17 Jun 18 | |
| 591 | 46.20 | | | 46.20 | PB | Georgina Ashby | | 1 | Michael Dyer | Reading AC | Bromley | 19 May 18 | |
| 592 | 46.2 | | | 44.6 | | Choire Lister | | 2 | Christopher Jeffery | Cornwall AC | Carn Brea | 12 May 18 | |
| 592 | 46.2 | | | 47.77/46.2 | PB | Scarlett Newby | | 2 | Gary Curtis | Birtley | Middlesbrough | 20 May 18 | |
| 592 | 46.2 | | | 47.21/46.2 | PB | Lauren Lucy Glynn | | 1 | | Hillingdon | Basingstoke | 8 Jul 18 | |
| 592 | 46.2 | | | 43.29 | | Olivia East | | 1 | Claire East | City of Portsmouth | Sandown | 15 Jul 18 | |
| 592 | 46.2 | | | 43.90 | | Madeleine Casey | | 2 | Geoffrey Hawes | Thames Valley | Wormwood Scrubs | 21 Jul 18 | |
| 597 | 46.21 | | | 44.89/44.6 | | Mhairi Arnott | | 2 | David Arnott | Corstorphine | Meadowmill | 8 Apr 18 | |
| 598 | 46.24 | | | 45.94i | | Olivia Travers | | 2 | Alasdair Carpenter | Erme Valley | Exeter | 8 Jul 18 | |
| 598 | 46.24 | | | 46.24 | PB | Millie Weller | | 2 | | Nene Valley | Hendon | 8 Jul 18 | |
| 600 | 46.25 | i | | 46.25i | PB | Emma Imamovic | | 2 | | Barnet | Lee Valley | 18 Mar 18 | |
| 600 | 46.25 | | | 46.25 | PB | Harriet Armstrong | | 2 | Barry Morris | Eastbourne | Crawley | 25 Jul 18 | |
| 602 | 46.27 | | | 46.27 | PB | Jasmine Caley | | 1 | Simon Prior | Wells City | Yeovil | 12 May 18 | |
| 602 | 46.27 | i | | 45.40i | | Lorien Carnegie | | 2 | | Inverclyde | Emirates Arena | 1 Dec 18 | |
| 604 | 46.29 | | | 46.29 | PB | Sienna Lee | | 2 | | Surrey Schs | Kingston | 9 Jun 18 | |
| 605 | 46.30 | | | 46.30 | PB | Jessica Lewis | | 2 | Paul Filer | Bristol & West | Yate | 12 May 18 | |
| 606 | 46.3 | | | 46.3 | PB | Jessica Chander | | 2 | | Leamington Athletics Academy | Leamington | 5 May 18 | |
| 606 | 46.3 | | | 46.3 | PB | Chloe Trew | | 1 | | Basildon | Ware | 6 May 18 | |
| 606 | 46.3 | | | 46.95/46.3 | PB | Lauren Brown | | 1 | | Alnwick | Jarrow | 20 May 18 | |
| 46.95 | | | | | | | | | | Middlesbrough | 13 May 18 | |
| 606 | 46.3 | | | 46.3 | PB | Indie Horn | | 2 | | Devon Schs | Exeter | 5 Jun 18 | |
| 606 | 46.3 | | | 49.46/46.3 | PB | Amelia Brown | | 1 | | Halifax | Leeds (BP) | 9 Jun 18 | |
| 606 | 46.3 | | | 43.98i | | Melissa Bills | | 2 | | Border | Blackburn | 17 Jun 18 | |
| 606 | 46.3 | | | 45.16/43.7 | | Chloe Brand | | 1 | | Thurrock | Gateshead | 7 Jul 18 | |
| 606 | 46.3 | | | 46.81/46.3 | PB | Amelia Skittrall | | 2 | John Dill | Swindon | Swindon | 15 Jul 18 | |
| 46.81 | | | | | | | | | | Tidworth | 13 May 18 | |
| 606 | 46.3 | i | | 42.81i | | Emma Ibbotson | | 2 | Charlene Thomas | Harrogate | Sheffield | 16 Dec 18 | |
| 615 | 46.32 | | | 46.32 | PB | Sirra Jayne Batchelor | | 2 | | Crawley | Crawley | 25 Jul 18 | |
| 616 | 46.33 | | | 46.33 | PB | Evie Wong | | 2 | Gwyn Jones | Cardiff | Cardiff | 12 May 18 | |
| 617 | 46.34 | | | 44.11/44.1 | | Evie Beck | | 1 | | Winchester | Portsmouth | 12 May 18 | |
| 617 | 46.34 | | | 46.34 | PB | Valencia Wright | | 1 | | Giffnock North | Kilmarnock | 23 Sep 18 | |
| 619 | 46.35 | | | 46.35 | PB | Leah Howard | | 2 | Dezz Reynolds | Blackpool, Wyre & Fylde | Stretford | 28 May 18 | |
| 619 | 46.35 | | | 46.35 | PB | Lara Appleby-Ironside | | 2 | | London City AC | Battersea | 9 Jun 18 | |
| 619 | 46.35 | | | 43.14i | | Susan Folorunso | | 2 | | Wallsend | Gateshead | 16 Jun 18 | |
| 622 | 46.36 | i | | 46.36i | PB | Niamh Smith | | 2 | | Giffnock North | Emirates Arena | 27 Jan 18 | |
| 623 | 46.37 | | | 42.31i | | Georgina Scoot | | 2 | Stephen Cottle | Torbay | Plymouth | 22 Apr 18 | |
| 624 | 46.38 | | | 46.38 | PB | Suzanne Brooke | | 2 | | Wakefield | Cudworth | 12 May 18 | |
| 625 | 46.39 | | | 46.39 | PB | Lily Ingualdson | | 2 | | Somerset Schs | Yeovil | 9 Jun 18 | |
| 626 | 46.40 | | | 44.10 | | Niamh Atkinson | | 1 | | Pontefract | Wakefield | 23 May 18 | |
| 627 | 46.4 | | | 48.87/46.4 | PB | Holly Wilkinson | | 2 | Vince Stamp | City of Portsmouth | Winchester | 8 Apr 18 | |
| 627 | 46.4 | | | 45.49/44.7 | | Grace Cardwell | | 1 | Graham Howell | Yate | Bath | 19 May 18 | |
| 46.43 | | | | | | | | | | Yate | 20 Jun 18 | |
| 627 | 46.4 | | | 50.37/46.4 | PB | Christiana Talmadge | | 2 | | Orion | Walthamstow | 19 May 18 | |
| 627 | 46.4 | | | 46.62/46.4 | PB | Iona Brodie | | 2 | | Aberdeen | Perth | 27 May 18 | |
| 627 | 46.4 | | | 46.4 | PB | Holly Freegard | | 2 | David Smith | Basildon | Basildon | 3 Jun 18 | |
| 627 | 46.4 | | | 46.4 | PB | Maya Lewis | | 2 | | Basildon | Basildon | 3 Jun 18 | |
| 627 | 46.4 | | | 47.55/46.4 | PB | Madison Hill | | 1 | | Braintree | Basildon | 3 Jun 18 | |
| 627 | 46.4 | | | 44.73 | | Lauren Pawson | | 1 | John Dill | Swindon | Newport | 17 Jun 18 | |
| 627 | 46.4 | | | 45.23i | | Robyn MacDonald | | 2 | | Lothian | Grangemouth | 23 Jun 18 | |
| 627 | 46.4 | | | 46.22i | | Kiah Chalmers | | 2 | Mark Smith | Dunfermline Track & Field | Grangemouth | 23 Jun 18 | |
| 627 | 46.4 | | | 46.4 | PB | Erin Kenny | | 2 | | Slough Junior | Bournemouth | 8 Jul 18 | |
| 638 | 46.42 | | | 46.42 | PB | Isla Donaldson | | 1 | | Orkney | Inverness | 12 May 18 | |
| 639 | 46.44 | i | | 40.58 | | Millie Hardy | | 1 | Martin Bishell | Wombwell | Sheffield | 25 Nov 18 | |
| 640 | 46.45 | | | 46.45 | PB | Amelia Bratt | | 2 | Duncan Mason | Salford H | Stretford | 28 May 18 | |
| 641 | 46.46 | | | 46.46 | PB | Amelia Pillar | | 2 | | Oxfordshire Schs | Birmingham | 3 Jul 18 | |
| 642 | 46.49 | | | 45.78 | | Julia Grosvenor | | 2 | | Leeds City | York | 2 Jun 18 | |
| 643 | 46.50 | | | 46.40 | | Kirsty Thomson | | 2 | | Shetland | Grangemouth | 9 Jun 18 | |
| 643 | 46.50 | | | 46.50 | PB | Victoria Zlatkovsky | | 1 | | Woodford Green Essex Ladies | Woodford | 21 Jul 18 | |
| 645 | 46.5 | | | 45.24 | | Kennedy Beardwell | | 2 | | Thurrock | Stevenage | 15 Apr 18 | |
| 645 | 46.5 | | | 46.5 | PB | Beth Orange | | 2 | | Leeds City | Leeds (BP) | 21 Apr 18 | |
| 645 | 46.5 | | | 46.5 | PB | Tamara Greatrex | | 2 | | Newham & Essex Beagles | Lewes | 21 Apr 18 | |
| 645 | 46.5 | | | 46.5 | PB | Sian Walton | | 1 | | Eden Runners | Carlisle | 9 Jun 18 | |
| 645 | 46.5 | | | 46.69/46.5 | PB | Erin Kenyon | | 2 | | Bury | Carlisle | 17 Jun 18 | |
| 46.86 | | | | | | | | | | Stretford | 9 Jun 18 | |
| 645 | 46.5 | | | 46.5 | PB | Holly Henderson | | 1 | Steve Perkin | Chiltern | Portsmouth | 17 Jun 18 | |
| 645 | 46.5 | | | 46.87/44.7 | | Hope Sankey | | 1 | | Eastbourne | Brighton | 29 Jun 18 | |
| 645 | 46.5 | | | 46.5 | PB | April Hill | | 2 | | Ipswich | Ipswich | 8 Jul 18 | |
| 645 | 46.5 | | | 45.45/44.4 | | Elsie Leiper | | 2 | Deborah Keenleyside | Dacorum | Ipswich | 8 Jul 18 | |
| 645 | 46.5 | | | 45.10i/44.4 | | Grace Gibson | | 1 | | Bury | Wigan | 21 Jul 18 | |
| 645 | 46.5 | | | 43.39i | | Non Elen Redvers Jones | | 1 | Stephen Livett | Menai | Bangor | 16 Sep 18 | |
| 656 | 46.51 | i | | 43.85 | | Orla Foley | | 1 | | St. Albans AC | Lee Valley | 18 Mar 18 | |
| 656 | 46.51 | i | | 46.51i/44.3 | PB | Nynka Rucker | | 2 | | Team Bath | Cardiff | 2 Dec 18 | |
| 46.9 | | | | | | | | | | Yate | 1 Jul 18 | |
| 658 | 46.54 | | | 45.23 | | Leah Green | | 1 | | City of Plymouth | Exeter | 9 Jun 18 | |
| 658 | 46.54 | | | 45.57/44.9 | | Madelyn Schneider | | 1 | Keith Palmer | Southend | Southend | 27 Aug 18 | |
| 660 | 46.55 | | | 46.55 | PB | Oscar Lay | | 1 | | Dartford H | Eltham | 17 Jun 18 | |
| 661 | 46.56 | | | 46.56 | PB | Jemima Stillwell | | 2 | | Mendip | Exeter | 6 May 18 | |
| 662 | 46.58 | | | 46.58 | PB | Kerri Reilly | | 2 | | Cumbernauld | Grangemouth | 22 Apr 18 | |
| 662 | 46.58 | | | 42.58 | | Lily Stewart | | 1 | | Tonbridge | Bromley | 6 May 18 | |
| 662 | 46.58 | | | 44.79 | | Alice Atkins | | 2 | | Havering | Chelmsford | 12 May 18 | |
| 665 | 46.6 | | | 46.77/46.2 | | Rebecca Mitchell | | 2 | | New Forest Junior | Winchester | 8 Apr 18 | |
| 665 | 46.6 | | | 46.6 | PB | Sophie Stanworth | | 2 | | Trawden | Preston | 28 Apr 18 | |
| 665 | 46.6 | | | 48.25/46.2 | | Jasmine Scott | | 1 | | St. Helens Sutton | Deeside | 19 May 18 | |
| 665 | 46.6 | | | 48.23i/46.6 | PB | Natalia Luczak | | 2 | Charles Garrett | Blackpool, Wyre & Fylde | Leigh | 19 May 18 | |
| 665 | 46.6 | | | 47.37/46.6 | PB | Millie Pattimore | | 1 | | Cwmbran | Worcester | 19 May 18 | |
| 665 | 46.6 | | | 46.0 | | Ruby Erzan-Essien | | 1 | | Bolton | Blackburn | 17 Jun 18 | |
| 665 | 46.6 | | | 46.6 | PB | Olivia Williams | | 1 | | Rugby & Northampton | Rugby | 24 Jun 18 | |
| 665 | 46.6 | | | 46.6 | PB | Jade Griscti | | 1 | Phill Morris | Independent Intelligent Fitness | Basingstoke | 1 Jul 18 | |
| 665 | 46.6 | | | 46.6 | PB | S Sillah | | 2 | | Oxfordshire Schs | Gateshead | 7 Jul 18 | |
| 665 | 46.6 | | | 46.6 | PB | Ellie Brooks | | 2 | Jay Galley | Blackheath & Bromley | Ashford | 8 Jul 18 | |
| 665 | 46.6 | | | 45.22i | | Isabel Wildgoose | | 1 | | St. Albans Striders | Braintree | 8 Jul 18 | |
| 665 | 46.6 | | | 47.55/46.6 | PB | Penelope Francis | | 1 | Alex Stanton | Bedford & County | Hemel Hempstead | 21 Jul 18 | |
| 665 | 46.6 | | | 47.05/46.6 | PB | Milly Unsworth | | 1 | | Cambridge & Coleridge | Cambridge | 2 Sep 18 | |
| 665 | 46.6 | | | 46.6 | PB | Gabriella Browne | | 2 | | Havering | Hornchurch | 16 Sep 18 | |
| 679 | 46.61 | | | 46.61 | PB | Madeleine Wood | | 2 | Michael Taylor | Wycombe | Little Marlow | 15 Apr 18 | |
| 679 | 46.61 | | | 46.61 | PB | Camilla Pearce | | 2 | | Windsor Slough Eton & Hounslow | Eton | 13 May 18 | |
| 681 | 46.62 | i | | 46.62i/46.0 | PB | Elizabeth Williamson | | 2 | Les Hall | Bolton | Sportcity | 16 Dec 18 | |
| 46.7 | | | | | | | | | | Leigh | 19 May 18 | |
| 682 | 46.63 | | | 46.63 | PB | Ellie Colquhoun-Lynn | | 2 | | Sale Harriers Manchester | Stretford | 9 Jun 18 | |
| 683 | 46.66 | i | | 46.66i | PB | Lauren Anderson | | 2 | | Birchfield H | Sportcity | 7 Jan 18 | |
| 683 | 46.66 | | | 46.66 | PB | Georgina Waight | | 2 | | London Schs | Battersea | 9 Jun 18 | |
| 685 | 46.68 | | | 46.68 | PB | Tully Peacocke | | 1 | | Rugby & Northampton | Nuneaton | 12 May 18 | |
| 685 | 46.68 | | | 46.68 | PB | Olivia Reid | | 1 | Kevin Williams | Newport H | Neath | 19 May 18 | |
| 685 | 46.68 | | | 46.68 | PB | Jesse Shute | | 2 | | Sussex Schs | Crawley | 9 Jun 18 | |
| 688 | 46.69 | | | 46.69 | PB | Mia Smith | | 2 | Trevor Raggett | Aldershot, Farnham & District | Kingston | 9 Jun 18 | |
| 689 | 46.70 | i | | 43.45 | | Emily Rankin | | 1 | Gary Tunstall | Preston | Sportcity | 16 Dec 18 | |
| 690 | 46.7 | | | 41.57i | | Arian Williams | | 1 | Barry Edwards | Menai | Blackburn | 21 Apr 18 | |
| 690 | 46.7 | | | 44.5 | | Lucy Richardson | | 1 | Robert Hughes | Cannock & Stafford | Stoke | 21 Apr 18 | |
| 690 | 46.7 | | | 46.7 | PB | Sam Potts | | 1 | | Alnwick | Whitley Bay | 29 Apr 18 | |
| 690 | 46.7 | | | 46.7 | PB | Eliska Watling | | 2 | | North Norfolk Harriers | Norwich | 12 May 18 | |
| 690 | 46.7 | | | 46.7 | PB | Amber English | | 1 | | Waveney Valley | Ipswich | 13 May 18 | |
| 690 | 46.7 | | | 45.6 | | Alice Brown | | 1 | Steve Perkin | Chiltern | Tooting Bec | 19 May 18 | |
| 690 | 46.7 | | | 46.40i | | Indiya Gannon | | 2 | | Amber Valley & Erewash | Sutton in Ashfield | 17 Jun 18 | |
| 46.85 | | 0.0 | | | | | | | | Derby | 28 Jul 18 | |
| 690 | 46.7 | | | 46.96/46.7 | PB | Libby McKinney | | 2 | Paul Hill | Cardiff Archers | Newport | 30 Jun 18 | |
| 690 | 46.7 | | | 48.92/46.7 | PB | Izzy Vaz | | 1 | | Aldershot, Farnham & District | Basingstoke | 1 Jul 18 | |
| 690 | 46.7 | | | 46.7 | PB | Megan Moore | | 2 | | Tonbridge | Ashford | 8 Jul 18 | |
| 690 | 46.7 | | | 44.7 | | Mairi Harrison | | 1 | | Manx | Douglas | 14 Jul 18 | |
| 690 | 46.7 | | | 47.72/46.7 | PB | Shannon Gilkes | | 2 | | Banbury | Banbury | 21 Jul 18 | |
| 690 | 46.7 | | | 43.03 | | Neve Davenport | | 1 | Andrew Wood | Trafford | Bangor | 21 Jul 18 | |
| 46.96 | | | | | | | | | | Stretford | 13 Sep 18 | |
| 690 | 46.7 | | | 46.54/45.8 | | Lucy Moore | | 1 | Steven Brick | Wirral | Bebington | 21 Jul 18 | |
| 46.74 | | | | | | | | | | Wakefield | 19 May 18 | |
| 690 | 46.7 | | | 43.03/42.1 | | Olivia Mensah | | 1 | | Walton | Worthing | 21 Jul 18 | |
| 705 | 46.72 | | | 46.72 | PB | Ella Nash | | 1 | James Bennett | MK Distance Project | Horspath | 12 May 18 | |
| 706 | 46.73 | | | 46.73/46.6 | PB | Kaela Nelson | | 1 | Michael Cottam | Radley | Horspath | 12 May 18 | |
| 707 | 46.74 | | | 46.74 | PB | Amy Wright | | 1 | | Berkshire Schs | Birmingham | 3 Jul 18 | |
| 708 | 46.75 | | | 46.75 | PB | Tabitha Roberts | | 2 | | Sussex Schs | Crawley | 9 Jun 18 | |
| 709 | 46.76 | | | 46.76 | PB | Catrin Minto | | 2 | | Cwmbran | Hereford | 5 May 18 | |
| 710 | 46.77 | | | 46.77 | PB | Emily Black | | 2 | | Shetland | Inverness | 12 May 18 | |
| 710 | 46.77 | | | 46.77 | PB | Chelsea-Summa Denton | | 2 | | Cardiff & The Vale Schs | Cardiff | 23 May 18 | |
| 710 | 46.77 | | | 45.70 | | Isla Scott | | 1 | Dudley Walker | Giffnock North | Livingston | 22 Aug 18 | |
| 710 | 46.77 | i | | 46.77i | PB | Alys Forman Wilshaw | | 2 | | London Schs | Lee Valley | 2 Dec 18 | |
| 714 | 46.79 | i | | 43.14i/42.8 | | Hannah Pain | | 2 | Michael Brown | City of Norwich | Lee Valley | 2 Dec 18 | |
| 46.9 | | | | | | | | | | Peterborough | 12 Aug 18 | |
| 715 | 46.8 | | | 47.82/46.8 | PB | Charlotte Hume | | 2 | | Orkney | Kirkwall | 29 Apr 18 | |
| 715 | 46.8 | | | 46.8 | PB | Rebecca Main | | 2 | | Macclesfield | Litherland | 19 May 18 | |
| 715 | 46.8 | | | 46.1 | | Rose Fitzgerald | | 1 | Andy Sleap | Aldershot, Farnham & District | Winchester | 19 May 18 | |
| 715 | 46.8 | | | 46.8 | PB | Darcey Barton | | 1 | | Stroud | Worcester | 19 May 18 | |
| 715 | 46.8 | | | 46.8 | PB | Jess McKensie | | 2 | | Warwickshire Schs | Leamington | 9 Jun 18 | |
| 715 | 46.8 | | | 47.00/46.7 | | Poppy Stokes | | 2 | | North Yorkshire Schs | York | 9 Jun 18 | |
| 715 | 46.8 | | | 46.8 | PB | Ellie Monaghan | | 2 | | Newark AC | Sutton in Ashfield | 17 Jun 18 | |
| 715 | 46.8 | | | 46.8 | PB | Marcia Callander | | 2 | | Musselburgh | Grangemouth | 23 Jun 18 | |
| 715 | 46.8 | | | 41.82 | | Jemima Robinson | | 1 | Anthony Lee | Cardiff | Newport | 30 Jun 18 | |
| 715 | 46.8 | | | 46.8 | PB | Hannah Warner | | 1 | | Southend | Gateshead | 7 Jul 18 | |
| 715 | 46.8 | | | 45.02i | | Helena Van Hullen | | 2 | John Garner | Dacorum | St. Albans | 5 Aug 18 | |
| 715 | 46.8 | | | 46.8 | PB | Iona Campbell | | 1 | Phil Lucker | South Glos | Gloucester | 12 Aug 18 | |
| 727 | 46.81 | | | 46.81 | PB | Akeiyla Robinson-Pascal | | 2 | | Blackheath & Bromley | Bromley | 11 Jun 18 | |
| 727 | 46.81 | i | | 46.41i | | Darcy Brown | | 2 | | Falkirk | Emirates Arena | 1 Dec 18 | |
| 729 | 46.83 | | | 46.83 | PB | Maya James | | 2 | | Camberley | Dartford | 27 Aug 18 | |
| 729 | 46.83 | i | | 46.83i | PB | Jodi Bemand | | 2 | Jonathan Moss | West Cheshire | Sportcity | 2 Dec 18 | |
| 731 | 46.84 | i | | 41.42 | | Lucy Wintle | | 1 | | Pembrokeshire | Cardiff | 2 Dec 18 | |
| 732 | 46.85 | | | 46.85 | PB | Amie Ringstead | | 1 | | North Uist | Inverness | 12 May 18 | |
| 732 | 46.85 | | | 46.85 | PB | Chloe Wood | | 2 | | Orkney | Inverness | 12 May 18 | |
| 734 | 46.86 | | | 46.52 | | Orla Carty | | 2 | Alex Giles | Gateshead | Middlesbrough | 13 May 18 | |
| 735 | 46.87 | | | 46.87 | PB | Isabella Thomson | | 2 | | Banchory Stonehaven | Aberdeen | 17 Jun 18 | |
| 735 | 46.87 | | | 46.87 | PB | Zara Reilly | | 2 | Lewis Samuel | Sheffield & Dearne | Sheffield | 17 Jun 18 | |
| 735 | 46.87 | | | 46.87 | PB | Natasha Tanner | | 2 | Colin Godfrey | Shaftesbury Barnet | Hendon | 8 Jul 18 | |
| 738 | 46.88 | | | 44.78i | | Erin Grime | | 2 | Ian Grime | Salford H | Stretford | 7 May 18 | |
| 738 | 46.88 | | | 46.16 | | Rebecca Cox | | 1 | Joe Frost | Stockport | Sheffield | 17 Jun 18 | |
| 740 | 46.90 | i | | 44.31/44.1 | | Emily Rawson | | 1 | Keeley Sutton | Notts | Sheffield | 25 Nov 18 | |
| 741 | 46.9 | | | 46.59 | | Charlotte Gilbody | | 2 | Nick Hughes | Bridgnorth | Stourport | 8 Apr 18 | |
| 741 | 46.9 | | | 47.20i/46.9 | PB | Ruby Schwarz | | 2 | | West Norfolk | Bury St Edmunds | 15 Apr 18 | |
| 741 | 46.9 | | | 46.9 | PB | Nicole Phillips | | 2 | Lynn Cooper | Houghton Harriers | Middlesbrough | 20 May 18 | |
| 741 | 46.9 | | | 48.51/46.9 | PB | Inka Moyaert | | 1 | | Banbury | Banbury | 24 Jun 18 | |
| 741 | 46.9 | | | 46.9 | PB | Tyler-Paige Guard | | 1 | | Waverley Harriers | Swindon | 1 Jul 18 | |
| 741 | 46.9 | | | 47.21/46.8 | | Eliza Craker | | 2 | | Maidenhead | Basingstoke | 8 Jul 18 | |
| 741 | 46.9 | | | 45.1 | | Zara Sheeran | | 2 | | Attleborough | Ipswich | 22 Jul 18 | |
| 741 | 46.9 | | | 45.99/45.2 | | Annie Buckingham | | 1 | | Radley | Banbury | 12 Aug 18 | |
| 749 | 46.91 | | | 46.91 | PB | Sophie Harrison | | 2 | Julie Alexander | Team Bath | Swansea | 21 Apr 18 | |
| 749 | 46.91 | | | 46.91 | PB | Candice Littell | | 1 | | Invicta East Kent | Canterbury | 14 Jun 18 | |
| 749 | 46.91 | i | | 46.91i | PB | Katie Gill | | 1 | | Cardiff Archers | Cardiff | 2 Dec 18 | |
| 752 | 46.94 | | | 46.94 | PB | Bethan Morgan | | 2 | Darryn McAtee | Newport H | Hereford | 5 May 18 | |
| 753 | 46.96 | | 0.9 | 43.38 | | Zara Evans | | 1 | | Carmarthen | Neath | 3 Jun 18 | |
| 754 | 46.97 | i | | 42.95 | | Skye Turner | | 2 | | Victoria Park City of Glasgow | Emirates Arena | 6 Jan 18 | |
| 754 | 46.97 | i | | 46.97i | PB | Nina Walshkirk | | 2 | Michael Love | Stewartry | Emirates Arena | 11 Mar 18 | |
| 754 | 46.97 | | | 46.60i | | Lexy Kenhard | | 1 | | Helensburgh | Kilmarnock | 20 May 18 | |
| 754 | 46.97 | | | 46.97 | PB | Emma Williams | | 2 | | Victoria Park City of Glasgow | Scotstoun | 17 Jun 18 | |
| 754 | 46.97 | | | 46.97 | PB | Amy Paul | | 1 | | Team East Lothian | Meadowmill | 26 Jun 18 | |
| 754 | 46.97 | | | 45.36/43.4 | | Clare Hudson | | 2 | | Stevenage & North Herts | Hendon | 5 Aug 18 | |
| 760 | 46.98 | | | 45.68 | | Sophie Leigh Mcilroy | | 2 | | Skyrac | York | 2 Jun 18 | |
| 761 | 46.99 | i | | 46.99i | PB | Miya Gladwin | | 1 | Leigh Paddon | Hallamshire | Sheffield | 25 Nov 18 | |
| 762 | 47.0 | | | 45.7 | | Annie Dudin | | 2 | | Rutland AC | Corby | 27 Mar 18 | |
| 762 | 47.0 | | | 47.0 | PB | Zoe Gardner | | 2 | Paul Harrison | Rugby & Northampton | Rugby | 14 Apr 18 | |
| 762 | 47.0 | | | 47.77/47.0 | PB | Zoe Ashurst | | 2 | | Rotherham | Spinkhill | 21 Apr 18 | |
| 762 | 47.0 | | | 47.0 | PB | Maddie Langham | | 1 | | Doncaster | Spinkhill | 21 Apr 18 | |
| 762 | 47.0 | | | 46.38 | | Elen Eirys James | | 2 | | Cardiff | Bath | 19 May 18 | |
| 762 | 47.0 | | | 44.70 | | Holly Pater | | 2 | Linda Mcgreavy | Leamington | Nuneaton | 19 May 18 | |
| 762 | 47.0 | | | 46.57i | | Rose Ryan | | 2 | | Perth Strathtay | Perth | 27 May 18 | |
| 762 | 47.0 | | | 47.53/47.0 | PB | Charlotte Miller | | 1 | Deborah Bray | City of Salisbury | Woking | 3 Jun 18 | |
| 762 | 47.0 | | | 47.0 | PB | Isabelle Wilkins | | 2 | Derek Darnell | Huntingdonshire | Luton | 17 Jun 18 | |
| 762 | 47.0 | | | 46.2 | | Emily Stratton | | 2 | | Fife | Grangemouth | 23 Jun 18 | |
| 762 | 47.0 | | | 45.55 | | Neve Hardcastle | | 2 | Jamie Russell | Longwood | Wakefield | 24 Jun 18 | |
| 762 | 47.0 | | | 48.06/47.0 | PB | Megan Forman | | 2 | | Louth | Hull | 30 Jun 18 | |
| 762 | 47.0 | | | 45.5 | | Naomi Holdsworth | | 1 | Paul Simpson | Isle of Wight | Basingstoke | 1 Jul 18 | |
| 762 | 47.0 | | | 45.52/44.2 | | Annie Beckwith | | 2 | Bill Boyd | Corby | Corby | 8 Jul 18 | |
| 762 | 47.0 | | | 47.0 | PB | Grace Curtis | | 2 | Graham Felton | Royal Sutton Coldfield | Worcester | 8 Jul 18 | |
| 762 | 47.0 | | | 45.9 | | Molly Altham | | 1 | | Lancaster & Morecambe | Bangor | 21 Jul 18 | |
| 762 | 47.0 | | | 47.0 | PB | Charlotte Watson | | 2 | | Huntingdonshire | Great Yarmouth | 22 Jul 18 | |
| 762 | 47.0 | | | 44.30/43.8 | | Georgia Eversden | | 2 | | Rugby & Northampton | Rugby | 18 Aug 18 | |
| 762 | 47.0 | | | 47.0 | PB | Shylah Brook | | 1 | Gary Howard | Havering | Hornchurch | 16 Sep 18 | |