| 300 Women Overall 2018 to 44.0 | Head to Head Top 10 |
| Rank | Perf | | | PB | | Name | | Year | Coach | Club | Venue | Date | |
| 1 | 37.74 | i | | 36.86 | | Finette Agyapong | U23 | -2 | Coral Nourrice | Newham & Essex Beagles | Ostrava, CZE | 25 Jan 18 |  |
| 2 | 38.05 | i | | 37.72 | | Margaret Adeoye | | 11 | Linford Christie | Enfield & Haringey | Lievin, FRA | 13 Feb 18 | |
| 3 | 38.46 | | | 38.46 | PB | Hannah Foster | U17 | -7 | Craig Andrew | Shaftesbury Barnet | Bedford | 25 Aug 18 | |
| 4 | 38.49 | | | 38.49 | PB | Jessica Armah | | 13 | Simon Duberley | Windsor Slough Eton & Hounslow | Eton | 25 Mar 18 | |
| 5 | 38.68 | | | 38.50i | | Holly Mpassy | U17 | -8 | Jay Galley | Blackheath & Bromley | Crawley | 16 Jun 18 | |
| 6 | 39.20 | | | 39.20 | PB | Jeslyn Agyei-Kyem | U15 | -9 | Andrew Kennard | Walton | Birmingham | 14 Jul 18 | |
| 7 | 39.26 | | | 39.26 | PB | Cedelle Agyei-Kyem | U17 | -7 | Andrew Kennard | Walton | Birmingham | 13 Jul 18 | |
| 8 | 39.43 | | | 38.78 | | Mair Edwards | U20 | -4 | John Davis | Basingstoke & Mid Hants | Basingstoke | 7 Apr 18 | |
| 9 | 39.51 | | | 38.66 | | Kelsey Stewart | U23 | -2 | Ken Hogg | Aberdeen | Aberdeen | 16 May 18 | |
| 10 | 39.56 | i | | 39.56i | PB | Laura Turley | U23 | -2 | Ian Broadhurst | West Cheshire | Sportcity | 7 Jan 18 | |
| 10 | 39.56 | i | | 39.56i | PB | Orla Brennan | U17 | -7 | Neil Dodson | Windsor Slough Eton & Hounslow | Sheffield | 25 Feb 18 | |
| 39.9 | | | | | | | | | | Reading | 9 Jun 18 | |
| 40.13 | | | | | | | | | | Eton | 1 Jul 18 | |
| 12 | 39.69 | | | 39.69 | PB | Poppy Malik | U15 | -8 | Grant Barker | Notts | Birmingham | 14 Jul 18 | |
| 13 | 39.76 | | | 39.31i | | Ashley Nemits | U15 | -9 | Trevor Painter | Warrington AC | Birmingham | 14 Jul 18 | |
| 14 | 39.82 | | | 39.82 | PB | Caitlyn Mapps | U17 | -7 | Phillip Warwicker | Cardiff Archers | Swansea | 10 Jun 18 | |
| 15 | 39.84 | | | 39.84 | PB | Madeleine Whapples | U17 | -8 | Everton Caines | Solihull & Small Heath | Birmingham | 14 Jul 18 | |
| 16 | 39.91 | i | | 39.20i | | Hannah Kelly | U20 | -5 | Les Hall | Bolton | Sportcity | 16 Dec 18 | |
| 17 | 40.00 | | | 40.00 | PB | Emily Miller | U17 | -7 | | Victoria Park City of Glasgow | Grangemouth | 8 Jun 18 | |
| 18 | 40.0 | | | 40.13i/40.0 | PB | Gemma Jones | U17 | -7 | Bill Boyd | Corby | Nottingham | 27 May 18 | |
| 40.13 | i | | | | | | | | | Sheffield | 25 Feb 18 | |
| 40.56 | | | | | | | | | | Bedford | 25 Aug 18 | |
| 19 | 40.04 | | | 40.04 | PB | Hermione Plumptre | | 5 | Keith Holt | Birchfield H | Eton | 25 Mar 18 | |
| 20 | 40.11 | | | 40.11 | PB | Katie Reville | U17 | -7 | David Hood | Edinburgh AC | Liverpool | 27 May 18 | |
| 21 | 40.12 | | | 40.12 | PB | Jade Hutchison | U17 | -7 | Eric Simpson | Pitreavie | Grangemouth | 8 Jun 18 | |
| 21 | 40.12 | | | 40.10 | | Tia Anderson | U17 | -7 | Peter Wileman | Durham | Birmingham | 13 Jul 18 | |
| 23 | 40.15 | | | 40.15 | PB | Lucy Elcock | U17 | -6 | | Bridgnorth | Birmingham | 16 Jun 18 | |
| 24 | 40.23 | | | 39.92 | | Lucia Gifford-Groves | U17 | -8 | | Thanet AC | Yeovil | 12 May 18 | |
| 25 | 40.25 | | | 39.38 | | Nandy Kihuyu | U15 | -10 | Veronica Boden | Hallamshire | Birmingham | 14 Jul 18 | |
| 26 | 40.3 | | | 40.3 | PB | Kayla Bowley | U17 | -6 | Paul Weston | Croydon | Epsom | 5 May 18 | |
| 27 | 40.36 | | | 40.36 | PB | Roisin Smith | U23 | -2 | James McMenemy | Airdrie Harriers | Scotstoun | 30 May 18 | |
| 28 | 40.44 | | | 40.44 | PB | Holly Murray | U17 | -7 | Joe Frost | Stockport | Birmingham | 13 Jul 18 | |
| 29 | 40.45 | | | 40.45 | PB | Louisa Stoney | U17 | -7 | Richard Holt | Kingston & Poly | Birmingham | 13 Jul 18 | |
| 30 | 40.46 | | | 40.46 | PB | Macey Morris | U17 | -8 | Kevin Williams | Swansea | Cardiff | 12 May 18 | |
| 31 | 40.49 | | | 39.63 | | Poppy Ellis | U17 | -7 | Tony Benton | Havering | Lee Valley | 8 Jul 18 | |
| 31 | 40.49 | | | 40.48 | | Mary Takwoingi | U17 | -6 | Andrew Webber | Solihull & Small Heath | Birmingham | 13 Jul 18 | |
| 33 | 40.50 | | | 40.50 | PB | Lucy-Jane Matthews | U17 | -7 | Andrew Fisher | Southampton | Exeter | 22 Jul 18 | |
| 34 | 40.5 | | | 39.76 | | Skye Wicks | U17 | -7 | David Rice | Hertford & Ware | Hemel Hempstead | 3 Jun 18 | |
| 40.74 | | | | | | | | | | Peterborough | 30 Jun 18 | |
| 35 | 40.51 | | | 40.51 | PB | Holly Kone | U17 | -6 | Grant Barker | Notts | Birmingham | 13 Jul 18 | |
| 36 | 40.52 | | | 40.52 | PB | Sarah Kearsey | | 2 | Glenn Walpole | Exeter | Exeter | 29 May 18 | |
| 37 | 40.53 | | | 40.53 | PB | Rebecca Matheson | U20 | -4 | Eddie McKenna | Aberdeen | Aberdeen | 16 May 18 | |
| 37 | 40.53 | | | 40.53 | PB | Olivia Kimbowa | U17 | -6 | Les Hall | Bolton | Stretford | 9 Jun 18 | |
| 39 | 40.6 | | | 40.51 | | Natalie Groves | U15 | -9 | Stuart Hall | Spenborough | Leeds (BP) | 9 Jun 18 | |
| 41.03 | | | | | | | | | | Birmingham | 13 Jul 18 | |
| 40 | 40.61 | | | 40.61 | PB | Annie Bell | U17 | -8 | | Border | Birmingham | 13 Jul 18 | |
| 40 | 40.61 | | | 40.61 | PB | Isabelle Bloem | U15 | -8 | | Halifax | Birmingham | 14 Jul 18 | |
| 42 | 40.63 | | | 40.63 | PB | Katie Foss | U17 | -8 | Michael Love | Giffnock North | Grangemouth | 26 Aug 18 | |
| 43 | 40.67 | | | 40.67 | PB | Iona McDonald | U17 | -6 | | Livingston | Grangemouth | 12 May 18 | |
| 44 | 40.69 | | | 40.69 | PB | Lucy Stennett | U17 | -7 | Sonya Ellis | Taunton | Yeovil | 9 Jun 18 | |
| 45 | 40.7 | | | 40.83/40.7 | PB | Jessica Frazer | U17 | -6 | Sandra Woodman | Bristol & West | Cheltenham | 7 May 18 | |
| 40.83 | | | | | | | | | | Birmingham | 13 Jul 18 | |
| 45 | 40.7 | | | 40.52 | | Emma Morris | U17 | -8 | Ken Spencer | Bracknell AC | Reading | 9 Jun 18 | |
| 41.36 | | | | | | | | | | Birmingham | 13 Jul 18 | |
| 45 | 40.7 | | | 40.84/40.7 | PB | Sacha Didcote | U17 | -8 | Philip Jones | Colwyn Bay | York | 1 Jul 18 | |
| 40.84 | | | | | | | | | | Stretford | 27 May 18 | |
| 48 | 40.73 | | | 40.73 | PB | Elizabeth Thompson | U17 | -7 | Kenneth Pearson | Central | Grangemouth | 8 Jun 18 | |
| 49 | 40.75 | i | | 39.68i | | Isabella Hilditch | U20 | -4 | John Blackie | Blackheath & Bromley | Princeton NJ, USA | 8 Dec 18 | |
| 50 | 40.77 | | | 40.40 | | Amber Clare | U20 | -6 | | Basingstoke & Mid Hants | Basingstoke | 7 Apr 18 | |
| 51 | 40.80 | | | 40.80 | PB | Melissa Coxon | U17 | -7 | Veronica Boden | Rotherham | Cudworth | 12 May 18 | |
| 52 | 40.81 | i | | 40.11 | | Jemima Copeman | U17 | -7 | Alan Hewson | Windsor Slough Eton & Hounslow | Sheffield | 24 Feb 18 | |
| 41.71 | | | | | | | | | | Reading | 29 Apr 18 | |
| 52 | 40.81 | iA | | 40.81i | PB | Immanuela Aliu | U20 | -5 | John Blackie | Blackheath & Bromley | Colorado Springs CO, USA | 7 Dec 18 | |
| 54 | 40.89 | i | | 40.15i | | Rachel Crorken | U20 | -4 | | Wakefield | Sportcity | 16 Dec 18 | |
| 55 | 40.90 | | | 40.90 | PB | Heather Macdonald | U17 | -7 | Daniel Njai-Rowney | Blyth | Gateshead | 16 Jun 18 | |
| 56 | 40.9 | | | 40.19i | | Mia Morrisroe | U15 | -9 | Stephen Carroll | Liverpool H | Bebington | 9 Jun 18 | |
| 41.21 | | | | | | | | | | Sheffield | 17 Jun 18 | |
| 56 | 40.9 | | | 41.05/40.9 | PB | Charlotte Buckley | U17 | -7 | Adrian Hemery | Thames Valley | Perivale | 1 Jul 18 | |
| 41.05 | | | | | | | | | | Lee Valley | 12 May 18 | |
| 58 | 40.91 | | | 40.91 | PB | Poppy Glasby-Seddon | U17 | -7 | Anita Richardson | Sale Harriers Manchester | Bury | 12 May 18 | |
| 59 | 40.95 | | | 40.95 | PB | Emily Bowart | U15 | -9 | Iain Presnell | Tonbridge | Ashford | 9 Jun 18 | |
| 60 | 40.98 | i | | 40.98i | PB | Acacia Williams-Hewitt | U17 | -8 | Paul Ttereve | Hallamshire | Sheffield | 24 Feb 18 | |
| 41.4 | | | | | | | | | | Grimsby | 27 May 18 | |
| 60 | 40.98 | | | 40.25 | | Imogen Pughe | U15 | -10 | | West Cheshire | Birmingham | 13 Jul 18 | |
| 62 | 40.99 | i | | 40.99i | PB | Lois Garland | U17 | -7 | Alan Erickson | Perth Strathtay | Emirates Arena | 8 Feb 18 | |
| 42.7 | | | | | | | | | | Perth | 27 May 18 | |
| 43.43 | | | | | | | | | | Grangemouth | 12 May 18 | |
| 62 | 40.99 | i | | 40.99i | PB | Indiana Malik | U17 | -7 | Grant Barker | Notts | Sheffield | 24 Feb 18 | |
| 42.87 | | | | | | | | | | Birmingham | 29 Apr 18 | |
| 62 | 40.99 | | | 40.53/40.5 | | Isabelle Skelton | U15 | -8 | Bill Boyd | Sutton-in-Ashfield | Birmingham | 13 Jul 18 | |
| 65 | 41.0 | | | 41.75/41.0 | PB | Poppy Oliver | U17 | -8 | Paul McKeown | Crawley | Kingston | 27 May 18 | |
| 41.86 | | | | | | | | | | Crawley | 12 May 18 | |
| 66 | 41.03 | | | 41.03 | PB | Catherine Edwards | U17 | -7 | Rod Finch | Basingstoke & Mid Hants | Basingstoke | 9 Jun 18 | |
| 67 | 41.04 | | | 41.04 | PB | Shakanya Osahon | U15 | -8 | Jay Galley | Blackheath & Bromley | Reading | 17 Jun 18 | |
| 67 | 41.04 | | | 41.04 | PB | India Jenkins | U17 | -7 | Darrell Maynard | Cwmbran | Newport | 24 Jun 18 | |
| 69 | 41.07 | | | 41.07 | PB | Tia Jackson | U17 | -7 | Jonathan Jackson | Bristol & West | Yate | 9 Jun 18 | |
| 69 | 41.07 | | | 41.07 | PB | Naomi Wilbram | U17 | -7 | | Charnwood | Loughborough | 13 Jun 18 | |
| 71 | 41.08 | | | 41.08 | PB | Jodie Martin | U17 | -7 | Bob Schofield | Kingston upon Hull | Leigh | 7 Jul 18 | |
| 72 | 41.1 | | | 43.38/41.1 | PB | Lauren Fall | U17 | -8 | Eric Cartwright | Telford AC | Shrewsbury | 19 Jul 18 | |
| 43.78 | | | | | | | | | | Tipton | 15 Apr 18 | |
| 73 | 41.12 | | | 40.75 | | Ella Wintle | U15 | -9 | | Pembrokeshire | Cardiff | 14 Jul 18 | |
| 74 | 41.16 | i | | 41.16i | PB | Charlotte Orton | U23 | -3 | Martin Owens | Birchfield H | Sportcity | 7 Jan 18 | |
| 75 | 41.18 | | | 40.35 | | Alyson Bell | U15 | -8 | | Giffnock North | Grangemouth | 20 May 18 | |
| 76 | 41.2 | | | 42.20/41.2 | PB | Zakia Mossi | U15 | -8 | Phillip Kissi | Blackheath & Bromley | Hornchurch | 21 Jul 18 | |
| 42.20 | | | | | | | | | | Reading | 17 Jun 18 | |
| 77 | 41.28 | | | 39.34 | | Chyna Russell | U20 | -5 | John Harris | Sutton & District | Tooting Bec | 31 Mar 18 | |
| 78 | 41.3 | | | 40.81 | | Naomi Palmer | U17 | -8 | Jane Dixon | Shaftesbury Barnet | Bedford | 13 May 18 | |
| 41.55 | | | | | | | | | | Bromley | 27 May 18 | |
| 78 | 41.3 | | | 40.06 | | Elizabeth Taylor | U15 | -9 | Ronald Crosby | Peterborough | Peterborough | 3 Jun 18 | |
| 41.80 | | | | | | | | | | Birmingham | 13 Jul 18 | |
| 78 | 41.3 | | | 41.3 | PB | Amelia Verney | U15 | -8 | Zac Kerin | Bournemouth | Bournemouth | 8 Jul 18 | |
| 81 | 41.31 | i | | 41.05i | | Ffion Mair Roberts | U20 | -5 | Philip Jones | Colwyn Bay | Cardiff | 16 Dec 18 | |
| 82 | 41.32 | | | 41.32 | PB | Abena Oteng | U17 | -6 | Colin Corless | Southend | Chelmsford | 9 Jun 18 | |
| 83 | 41.33 | | | 39.23 | | Emily Newnham | U15 | -9 | Nick Dakin | Medway Phoenix | Woodford | 21 Jul 18 | |
| 84 | 41.35 | | | 41.21/41.0 | | Hannah Roberts | U17 | -7 | Ken Spencer | Bracknell AC | Bromley | 27 May 18 | |
| 85 | 41.37 | i | | 41.37i | PB | Ella Rush | U15 | -9 | David Feeney | Amber Valley & Erewash | Sheffield | 24 Feb 18 | |
| 41.74 | | | | | | | | | | Loughborough | 30 May 18 | |
| 42.8 | | | | | | | | | | Telford | 5 May 18 | |
| 86 | 41.38 | i | | 41.33 | | Isla Innes | U17 | -7 | | Edinburgh AC | Emirates Arena | 8 Feb 18 | |
| 41.85 | | | | | | | | | | Grangemouth | 6 May 18 | |
| 87 | 41.4 | | | 42.94/41.4 | PB | Carmen Neat | U17 | -6 | Ken Allan | Aberdeen | Perth | 27 May 18 | |
| 42.94 | | | | | | | | | | Aberdeen | 16 May 18 | |
| 87 | 41.4 | | | 41.92/41.4 | PB | Abbie Lovering | U17 | -8 | Paul G Hine | Wimborne | Basingstoke | 6 Jun 18 | |
| 41.92 | | | | | | | | | | Exeter | 8 Jul 18 | |
| 87 | 41.4 | | | 41.58/41.4 | PB | Imogen Sheppard | U17 | -6 | Michael Sheppard | Stratford-upon-Avon | Leamington | 9 Jun 18 | |
| 41.74 | | | | | | | | | | Birmingham | 16 Jun 18 | |
| 87 | 41.4 | | | 40.80i | | Sophie Walton | U15 | -9 | Trevor Williams | Horwich | Blackburn | 17 Jun 18 | |
| 87 | 41.4 | | | 41.29 | | Laure Kidukula | U15 | -8 | Vicente Modahl | Sale Harriers Manchester | Bebington | 21 Jul 18 | |
| 41.59 | | | | | | | | | | Wakefield | 19 May 18 | |
| 92 | 41.42 | | | 41.42 | PB | Jessica O'Hara | U17 | -6 | | Tonbridge | Ashford | 9 Jun 18 | |
| 93 | 41.43 | | | 41.43 | PB | Lottie Jeffrey | U17 | -8 | Eric Simpson | Falkirk | Grangemouth | 12 May 18 | |
| 93 | 41.43 | | | 40.60 | | Isabel Pinder | U15 | -8 | Rod Finch | Basingstoke & Mid Hants | Basingstoke | 9 Jun 18 | |
| 95 | 41.48 | | | 41.48 | PB | Fatoumatta Bojang | U15 | -9 | Jonathan Moss | West Cheshire | Wakefield | 19 May 18 | |
| 96 | 41.49 | i | | 41.49i | PB | Mia Chantree | U17 | -6 | Steve Mitchell | Chelmsford | Sheffield | 24 Feb 18 | |
| 96 | 41.49 | | | 40.81 | | Layla Zuill | U15 | -8 | Steven Doig | Fife | Scotstoun | 30 May 18 | |
| 98 | 41.5 | | | 39.95 | | Louisa Saunders | U20 | -5 | Michael Bazire | Brighton Phoenix | Tonbridge | 2 Apr 18 | |
| 98 | 41.5 | | | 41.06 | | Bea Green | U17 | -7 | Martin Cook | Ipswich | Ipswich | 13 May 18 | |
| 42.04 | | | | | | | | | | Birmingham | 13 Jul 18 | |
| 98 | 41.5 | | | 39.63 | | Emilia Rock | U15 | -10 | Nick Taylor | Vale of Aylesbury | Mile End | 19 May 18 | |
| 41.70 | | | | | | | | | | Birmingham | 13 Jul 18 | |
| 101 | 41.53 | i | | 41.21i | | Heather Carson | | 1 | Martin Cook | Sheffield & Dearne | Sheffield | 1 Dec 18 | |
| 102 | 41.55 | | | 40.63/40.2 | | Shammah Sowah | U17 | -7 | | Orion | Mile End | 27 May 18 | |
| 102 | 41.55 | | | 41.55 | PB | Isabel Davies | U17 | -6 | Kevin Williams | Swansea | Newport | 24 Jun 18 | |
| 104 | 41.57 | | | 41.57 | PB | Molly Swingler | U17 | -8 | Christopher Voice | Eastbourne | Crawley | 16 Jun 18 | |
| 105 | 41.60 | | | 41.60 | PB | Leah Proctor | U17 | -8 | | Chesterfield | Nottingham | 13 May 18 | |
| 105 | 41.60 | | | 41.60 | PB | Bethany Allott | U17 | -8 | Lee Walker | Sheffield & Dearne | Birmingham | 13 Jul 18 | |
| 107 | 41.6 | | | 41.58 | | Charlotte Johnson | U17 | -7 | Ken Spencer | Bracknell AC | Reading | 9 Jun 18 | |
| 41.86 | | | | | | | | | | Bromley | 27 May 18 | |
| 107 | 41.6 | | | 39.48 | | Neave McGhee | U15 | -9 | | Liverpool H | Middlesbrough | 21 Jul 18 | |
| 41.94 | | | | | | | | | | Sheffield | 17 Jun 18 | |
| 109 | 41.61 | | | 41.61 | PB | Alice Brown | U15 | -8 | Patrick Gahagan | Havering | Bromley | 19 May 18 | |
| 110 | 41.63 | i | | 40.81i | | Eleanor Rawson | U23 | -2 | Lueng Man | Sheffield & Dearne | Sheffield | 1 Dec 18 | |
| 111 | 41.64 | i | | 41.48 | | Lana Culliford | U20 | -5 | Helen Patricia James | Cardiff | Cardiff | 16 Dec 18 | |
| 112 | 41.7 | | | 42.82/41.7 | PB | Eve Clawley | U17 | -7 | Gordon Densley | Tamworth | Stoke | 9 Jun 18 | |
| 42.82 | | | | | | | | | | Birmingham | 13 Jul 18 | |
| 112 | 41.7 | | | 42.58/41.7 | PB | India Perry | U17 | -8 | | Basildon | Gateshead | 7 Jul 18 | |
| 42.58 | | | | | | | | | | Stevenage | 27 May 18 | |
| 112 | 41.7 | | | 42.57/41.7 | PB | Jade Kavanagh | U17 | -7 | Trevor Wells | Havering | St. Albans | 5 Aug 18 | |
| 112 | 41.7 | | | 42.79i/41.0 | | Serena Grace | U17 | -8 | Michael Utting | City of Norwich | St. Albans | 5 Aug 18 | |
| 42.79 | i | | | | | | | | | Lee Valley | 2 Dec 18 | |
| 116 | 41.71 | | | 40.80 | | Keira Rose | U15 | -8 | Iain Presnell | Medway & Maidstone | Ashford | 9 Jun 18 | |
| 116 | 41.71 | | | 41.25 | | Ava Taperell | U15 | -8 | Kevin Flannery | Gateshead | Sheffield | 17 Jun 18 | |
| 118 | 41.73 | | | 41.01i | | Georgia Morrison | U17 | -6 | Kenny Morrison | Inverclyde | Kilmarnock | 12 May 18 | |
| 119 | 41.74 | i | | 41.74i | PB | Amelia Lees | U17 | -6 | Tom Druce | Guernsey | Sheffield | 24 Feb 18 | |
| 41.75 | | | | | | | | | | St. Peter Port | 29 Apr 18 | |
| 120 | 41.75 | | | 41.75 | PB | Zahara Malcolm | U15 | -9 | John Stow | Woodford Green Essex Ladies | Chelmsford | 9 Jun 18 | |
| 121 | 41.77 | | | 39.65 | | Sophie Wallwork | U15 | -10 | Eric Simpson | Pitreavie | Aberdeen | 19 Aug 18 | |
| 122 | 41.78 | | | 41.78 | PB | Maya Curry | U17 | -8 | Anita Richardson | Sale Harriers Manchester | Liverpool | 27 May 18 | |
| 123 | 41.79 | | | 41.79 | PB | Emma Hansen | U17 | -8 | Andrew Beadle | Cheltenham | Swansea | 29 Jul 18 | |
| 124 | 41.8 | | | 41.95/41.6 | | Katrina Simpson | U20 | -5 | Michael Mielczarek | Halesowen | Stourport | 8 Apr 18 | |
| 124 | 41.8 | | | 42.63i/41.8 | PB | Alissa Darbyshire | U17 | -8 | Peter Crook | Preston | Blackburn | 12 May 18 | |
| 42.80 | | | | | | | | | | Leigh | 7 Jul 18 | |
| 124 | 41.8 | | | 42.16/41.8 | PB | Mary Beetham-Green | U17 | -7 | Kevin Smith | Rugby & Northampton | Corby | 13 May 18 | |
| 42.16 | | | | | | | | | | Nuneaton | 12 Aug 18 | |
| 124 | 41.8 | | | 42.52/41.8 | PB | Shannon Flockhart | U17 | -7 | Robert Pocklington | Huntingdonshire | Peterborough | 9 Jun 18 | |
| 42.52 | | | | | | | | | | Peterborough | 12 May 18 | |
| 124 | 41.8 | | | 42.14/41.8 | PB | Maddison Sawyer | U15 | -8 | Mike Botha | Invicta East Kent | Ashford | 8 Jul 18 | |
| 129 | 41.81 | | | 40.46 | | Emma Rutherford | U17 | -6 | Alan Erickson | Perth Strathtay | Grangemouth | 12 May 18 | |
| 130 | 41.82 | | | 40.40 | | Lucy Fellows | U15 | -9 | | St. Mary's Richmond | Bedford | 21 Apr 18 | |
| 130 | 41.82 | | | 41.67 | | Freya Menzies | U20 | -5 | Ryan McAllister | Giffnock North | Scotstoun | 30 May 18 | |
| 130 | 41.82 | i | | 41.82i | PB | Alexa Shaw | | 1 | | Rugby & Northampton | Cardiff | 14 Nov 18 | |
| 133 | 41.84 | | | 41.84 | PB | Imogen Lewis | U15 | -8 | Linda Nicholson | Lasswade | Meadowmill | 26 Jun 18 | |
| 133 | 41.84 | i | | 41.26i | | Erin Minton-Branfoot | U23 | -3 | Sarah Stark | Chelmsford | Sheffield | 1 Dec 18 | |
| 135 | 41.85 | | | 41.03 | | Katie Monteith | U17 | -8 | Laura Kerr | City of Lisburn | Antrim | 28 Apr 18 | |
| 136 | 41.86 | | | 41.28 | | Chloe Kornevall | U17 | -8 | David Leach | Lewes | Lee Valley | 8 Jul 18 | |
| 137 | 41.88 | i | | 41.88i | PB | Sade Kaka | U17 | -7 | John Smith | Sheffield & Dearne | Sheffield | 1 Dec 18 | |
| 138 | 41.9 | | | 43.60/41.9 | PB | Emma Fulton | U17 | -7 | Andy Bibby | Preston | Blackpool | 9 Jun 18 | |
| 138 | 41.9 | | | 42.63/41.9 | PB | Sian Vico | U17 | -7 | Michael Mahoney | Wycombe | Milton Keynes | 9 Jun 18 | |
| 42.63 | | | | | | | | | | Lee Valley | 8 Jul 18 | |
| 138 | 41.9 | | | 42.49/41.9 | PB | Alicja Gawronski | U15 | -9 | | Nene Valley | Peterborough | 9 Jun 18 | |
| 42.49 | | | | | | | | | | Birmingham | 13 Jul 18 | |
| 138 | 41.9 | | | 42.09/41.0 | | Emily Thompson | U20 | -5 | Ros Kelling | Banbury | Banbury | 24 Jun 18 | |
| 138 | 41.9 | | | 41.76 | | Sophia Davila | U17 | -8 | Everton Caines | Solihull & Small Heath | Solihull | 1 Jul 18 | |
| 43.97 | | | | | | | | | | Tipton | 15 Apr 18 | |
| 138 | 41.9 | | | 41.9 | PB | Brooke Ironside | U17 | -8 | Zac Kerin | Bournemouth | Bournemouth | 8 Jul 18 | |
| 144 | 41.91 | | | 38.81i | | Rebecca Grieve | U15 | -10 | Francis Smith | Pitreavie | Aberdeen | 19 Aug 18 | |
| 145 | 41.93 | | | 40.66 | | Nicole Alves | U17 | -7 | Carl Graham | Woodford Green Essex Ladies | Chelmsford | 9 Jun 18 | |
| 146 | 41.95 | i | | 40.99i | | Rachel Callan | U17 | -8 | | Giffnock North | Emirates Arena | 1 Dec 18 | |
| 42.29 | | | | | | | | | | Kilmarnock | 9 Sep 18 | |
| 147 | 41.98 | i | | 41.90i | | Meg McHugh | U20 | -5 | John Smith | Sale Harriers Manchester | Sportcity | 7 Jan 18 | |
| 147 | 41.98 | i | | 41.73 | | Morgan Spink | U17 | -7 | Sam Thorpe | Rotherham | Sheffield | 24 Jan 18 | |
| 42.12 | | | | | | | | | | Nottingham | 13 May 18 | |
| 147 | 41.98 | i | | 41.98i | PB | Sophie Slider | U17 | -8 | Ricky Taylor | Ayr Seaforth | Emirates Arena | 8 Feb 18 | |
| 42.27 | | | | | | | | | | Grangemouth | 8 Jun 18 | |
| 147 | 41.98 | | | 41.98 | PB | Lily Gaskin | U17 | -7 | Liz Davies | Cardiff | Cardiff | 27 May 18 | |
| 147 | 41.98 | | | 41.98 | PB | Angelica Oparinde | U17 | -8 | Kevin Reynolds | Derby | Derby | 9 Jun 18 | |
| 147 | 41.98 | | | 41.98 | PB | Niamh Edgar | U17 | -7 | | Edinburgh AC | Carlisle | 1 Jul 18 | |
| 153 | 41.99 | | | 41.99 | PB | Amy Battle | U15 | -9 | Joe Frost | Stockport | Liverpool | 19 May 18 | |
| 154 | 42.00 | | | 42.00/41.3 | PB | Ayomide Cole | U15 | -10 | | Basingstoke & Mid Hants | Bracknell | 3 Jun 18 | |
| 154 | 42.00 | | | 42.00 | PB | Antonia Dawes | U15 | -9 | Darryn McAtee | Newport H | Cardiff | 14 Jul 18 | |
| 156 | 42.0 | | | 42.22/41.9 | | Hannah Childs | U17 | -7 | Sara MacDonald-Gray | Southampton | Portsmouth | 1 Apr 18 | |
| 156 | 42.0 | | | 41.34 | | Teniola Fajuke | U15 | -9 | Alf Vickers | Victoria Park & Tower Hamlets | Mile End | 19 May 18 | |
| 42.27 | | | | | | | | | | Lee Valley | 12 Aug 18 | |
| 156 | 42.0 | | | 41.96/41.2 | | Jasmin Drummond | U17 | -7 | | Birchfield H | Nottingham | 27 May 18 | |
| 43.72 | | | | | | | | | | Warwick | 2 May 18 | |
| 156 | 42.0 | | | 43.24/42.0 | PB | Meg Willis | U15 | -9 | David Pring | City of Norwich | Peterborough | 3 Jun 18 | |
| 43.24 | | | | | | | | | | Lee Valley | 11 Aug 18 | |
| 156 | 42.0 | | | 42.18/42.0 | PB | Katie Dinwoodie | U17 | -8 | Louise Jamieson | Shetland | Lerwick | 29 Jun 18 | |
| 42.18 | | | | | | | | | | Inverness | 12 May 18 | |
| 156 | 42.0 | | | 41.55/41.5 | | Ella Fryer | U15 | -9 | | St. Mary's Richmond | Tooting Bec | 30 Jun 18 | |
| 42.11 | | | | | | | | | | Woking | 2 Sep 18 | |
| 162 | 42.01 | | | 42.01 | PB | Isla Calvert | U17 | -8 | | Livingston | Livingston | 20 Jun 18 | |
| 163 | 42.02 | | | 42.02 | PB | Grace Cottrell | U23 | -1 | | Yeovil | Exeter | 27 Mar 18 | |
| 164 | 42.03 | | | 41.51 | | Harriet Tuson | U17 | -7 | | Yeovil | Yeovil | 9 Jun 18 | |
| 164 | 42.03 | | | 42.03 | PB | Ailsa Marsh | U17 | -6 | Paul Allan | Pitreavie | Grangemouth | 4 Jul 18 | |
| 166 | 42.05 | | | 41.03 | | Isabel White | U15 | -9 | Lee Walker | Longwood | Cudworth | 12 May 18 | |
| 166 | 42.05 | | | 41.87 | | Zoe Dake | U17 | -8 | Paul Weston | Croydon | Kingston | 9 Jun 18 | |
| 168 | 42.07 | | | 42.07 | PB | Hannah Burn | U15 | -9 | | Kilmarnock | Kilmarnock | 20 May 18 | |
| 168 | 42.07 | | | 42.07 | PB | Alana Lea | U15 | -8 | Gwyn Jones | Cardiff | Cardiff | 14 Jul 18 | |
| 168 | 42.07 | i | | 41.91 | | Rebecca Roots | U20 | -4 | David Norton | Torbay | Cardiff | 16 Dec 18 | |
| 171 | 42.08 | | | 42.08 | PB | Ty Brockley-Langford | U17 | -7 | Paul Roden | Salford H | Stretford | 27 May 18 | |
| 172 | 42.09 | | | 40.92 | | Jessica Lister | U17 | -8 | David Buckett | Crawley | Crawley | 25 Jul 18 | |
| 173 | 42.1 | | | 42.1 | PB | Kate Jenkinson | U17 | -7 | David Titterington | Blackpool, Wyre & Fylde | Blackburn | 12 May 18 | |
| 173 | 42.1 | | | 42.14/42.1 | PB | Cleo Tomlinson | U15 | -9 | Stephen King | Horsham Blue Star | Horsham | 19 May 18 | |
| 42.14 | | | | | | | | | | Crawley | 12 May 18 | |
| 173 | 42.1 | | | 42.12/42.1 | PB | Laura Anene | U15 | -9 | | Hillingdon | Mile End | 19 May 18 | |
| 42.56 | | | | | | | | | | Bracknell | 3 Jun 18 | |
| 173 | 42.1 | | | 41.43/41.2 | | Kianna Proctor | U15 | -9 | Andy Bibby | Preston | Blackpool | 9 Jun 18 | |
| 42.34 | | | | | | | | | | Bedford | 8 Sep 18 | |
| 177 | 42.12 | | | 42.12 | PB | Susannah Lecoutre | U15 | -9 | | Guildford & Godalming | Bracknell | 3 Jun 18 | |
| 178 | 42.16 | i | | 41.35 | | Sophie Williams | | 3 | Mike Sweeney | Liverpool H | Sportcity | 7 Jan 18 | |
| 178 | 42.16 | | | 40.93 | | Tamsin Fowlie | U15 | -9 | Scott Hamilton | Moray | Inverness | 27 May 18 | |
| 180 | 42.17 | | | 42.17 | PB | Maya Marriner | U15 | -8 | Dan Gill | Medway & Maidstone | Bromley | 6 May 18 | |
| 180 | 42.17 | | | 42.17 | PB | Georgia Tombs | U17 | -8 | Stephen Williams | Chelmsford | Chelmsford | 9 Jun 18 | |
| 182 | 42.18 | | | 42.18 | PB | Ella Saxby | U17 | -8 | Stella Bandu | Ashford AC | Ashford | 9 Jun 18 | |
| 182 | 42.18 | | | 42.18 | PB | Ellie Brown | U17 | -7 | Joseph McDonnell ☘️ | Charnwood | Loughborough | 13 Jun 18 | |
| 182 | 42.18 | | | 41.00 | | Lily Bailey | U15 | -9 | Jonathan Jackson | Bristol & West | Birmingham | 13 Jul 18 | |
| 185 | 42.19 | | | 42.19 | PB | Amber DuVerney | U17 | -8 | Jacqui Agyepong | Shaftesbury Barnet | Lee Valley | 12 May 18 | |
| 185 | 42.19 | | | 42.19 | PB | Maisie Jeger | U15 | -8 | Lee Grint | Southampton | Reading | 17 Jun 18 | |
| 187 | 42.2 | | | 42.21/42.2 | PB | Lucy Atkins | U15 | -8 | Pat Logan | Kingston & Poly | Horsham | 19 May 18 | |
| 42.64 | | | | | | | | | | Crawley | 16 Jun 18 | |
| 187 | 42.2 | | | 42.02i/41.9 | | Skye Verwey | U17 | -7 | Sharon Edghill | Marshall Milton Keynes | Milton Keynes | 9 Jun 18 | |
| 43.21 | | | | | | | | | | Loughborough | 1 Aug 18 | |
| 187 | 42.2 | | | 42.56/42.2 | PB | Tracy Linus | U15 | -9 | David Leach | Lewes | Brighton | 29 Jun 18 | |
| 42.56 | | | | | | | | | | Crawley | 12 May 18 | |
| 187 | 42.2 | | | 42.34i/42.2 | PB | Lucy Giles | U17 | -8 | Alex Giles | Gateshead | York | 1 Jul 18 | |
| 42.63 | | | | | | | | | | Leigh | 7 Jul 18 | |
| 187 | 42.2 | | | 42.2 | PB | Ruby Anning | U15 | -9 | Daniel Brooker | Brighton & Hove | Brighton | 21 Jul 18 | |
| 187 | 42.2 | | | 41.35i/41.0 | | Lily Parris | U17 | -8 | Sarah Stark | Chelmsford | Peterborough | 5 Aug 18 | |
| 43.52 | | | | | | | | | | Stevenage | 2 Sep 18 | |
| 187 | 42.2 | | | 42.2 | PB | Emily Cann | U15 | -10 | | West Suffolk | Ipswich | 12 Aug 18 | |
| 194 | 42.23 | | | 42.23 | PB | Megan Costello | U17 | -7 | Geoffrey Fenwick | Gateshead | Jarrow | 18 Apr 18 | |
| 195 | 42.24 | i | | 41.68i | | Leah Keisler | U17 | -8 | Michael Love | Law | Emirates Arena | 1 Dec 18 | |
| 196 | 42.25 | | | 42.06 | | Eve Denholm | U17 | -6 | Ryan McAllister | Giffnock North | Carlisle | 29 Apr 18 | |
| 197 | 42.26 | | | 42.26 | PB | Sophia Deans | U15 | -9 | Sharon Morris | Birchfield H | Stoke Gifford | 21 Jul 18 | |
| 198 | 42.29 | i | | 41.79 | | Ruka Shonibare | U20 | -7 | Carl Worthington | Sale Harriers Manchester | Sheffield | 1 Dec 18 | |
| 199 | 42.30 | | | 42.30 | PB | Jatila Blake | | 1 | Neil Dodson | Windsor Slough Eton & Hounslow | Eton | 25 Mar 18 | |
| 200 | 42.3 | | | 42.73/42.3 | PB | Leonie Onyems | U17 | -7 | | Dacorum | Watford | 15 Apr 18 | |
| 42.73 | | | | | | | | | | Hendon | 29 Jul 18 | |
| 200 | 42.3 | | | 45.31i/42.3 | PB | Alice Cashin | U17 | -7 | | Northern (Isle of Man) | Blackburn | 12 May 18 | |
| 200 | 42.3 | | | 42.3 | PB | Rose FitzGerald | U20 | -4 | | London Schs | Tooting Bec | 30 Jun 18 | |
| 203 | 42.31 | i | | 41.45i | | Katie Burr | U15 | -8 | | Victoria Park City of Glasgow | Emirates Arena | 27 Jan 18 | |
| 204 | 42.33 | | | 42.09i | | Olivia Fowler | U15 | -9 | Mark Machin | Crewe & Nantwich | Stretford | 28 May 18 | |
| 205 | 42.34 | | | 42.34 | PB | Nicole Furness | U17 | -7 | William Day | Falkirk | Grangemouth | 6 May 18 | |
| 205 | 42.34 | | | 40.72 | | Emma Mailer | U17 | -7 | John Dawson | Central | Livingston | 22 Aug 18 | |
| 207 | 42.38 | | | 41.56i | | Gemma Bruce | U17 | -7 | | Ayr Seaforth | Ayr | 22 Jul 18 | |
| 208 | 42.39 | | | 42.39 | PB | Isabelle Harding | U15 | -9 | Stuart Earl | Invicta East Kent | Ashford | 13 May 18 | |
| 208 | 42.39 | i | | 41.43 | | Jenna Hilditch | U15 | -11 | Moira Jordan | Victoria Park City of Glasgow | Emirates Arena | 1 Dec 18 | |
| 210 | 42.40 | | | 42.40/42.3 | PB | Olivia James | U15 | -9 | Richard Jackson | Camberley | Basingstoke | 9 Jun 18 | |
| 210 | 42.40 | | | 42.40 | PB | Rachel Champion | U17 | -7 | Brian O'Hare | Exeter | Exeter | 22 Jul 18 | |
| 212 | 42.4 | | | 42.63/42.4 | PB | Kate Raven | U17 | -7 | Andrew Kennard | Walton | Erith | 27 May 18 | |
| 42.63 | | | | | | | | | | Kingston | 9 Jun 18 | |
| 212 | 42.4 | | | 42.52/42.4 | PB | Glalys Dacosta | U17 | -6 | | Croydon | Croydon | 2 Jun 18 | |
| 42.65 | | | | | | | | | | Kingston | 9 Jun 18 | |
| 212 | 42.4 | | | 42.51/42.4 | PB | Eleanor Milbourn | U15 | -9 | | Hallamshire | Doncaster | 9 Jun 18 | |
| 42.51 | | | | | | | | | | Birmingham | 13 Jul 18 | |
| 215 | 42.44 | | | 42.44 | PB | Rebekah O'Brien | U17 | -7 | | Tonbridge | Ashford | 13 May 18 | |
| 216 | 42.45 | | | 39.41i | | Tess McHugh | U17 | -7 | Peter Shaw | Sale Harriers Manchester | Stoke | 15 Apr 18 | |
| 216 | 42.45 | i | | 42.45i | PB | Amelia Hill | U20 | -6 | Jeffrey Harwood | Blaenau Gwent | Cardiff | 16 Dec 18 | |
| 216 | 42.45 | i | | 42.04 | | Julia Winogrodzka | U15 | -9 | | Bolton | Sportcity | 16 Dec 18 | |
| 219 | 42.47 | | | 42.47 | PB | Alaw Evans | U17 | -7 | Francis Baker | Cardiff Archers | Newport | 24 Jun 18 | |
| 220 | 42.48 | | | 42.48 | PB | Rebecca Squires | U15 | -9 | Philip Long | Exeter | Exeter | 22 Jul 18 | |
| 220 | 42.48 | | | 41.57 | | Jamie Bulbring | U15 | -8 | Tammie Ryder | Tavistock | Tavistock | 12 Aug 18 | |
| 222 | 42.5 | | | 42.51i/42.5 | PB | Olivia Ashdown | U15 | -8 | | Sale Harriers Manchester | Leeds (BP) | 21 Apr 18 | |
| 42.70 | | | | | | | | | | Stretford | 28 May 18 | |
| 222 | 42.5 | | | 43.49/42.5 | PB | Anna Montagne | U17 | -7 | Deborah Montgomery | Team Kennet | Portsmouth | 10 Jun 18 | |
| 222 | 42.5 | | | 46.10/42.5 | PB | Zoe Hunter | U15 | -9 | Edward Gregorczyk | Leeds City | Ellesmere Port | 17 Jun 18 | |
| 222 | 42.5 | | | 41.9 | | Olivia Leigh | U15 | -8 | Katie Hewison | Chorley ATC | Litherland | 30 Jun 18 | |
| 222 | 42.5 | | | 42.60/42.5 | PB | Amy Dove | U17 | -7 | Alan Driver | Camberley | Swindon | 1 Jul 18 | |
| 222 | 42.5 | | | 42.74/42.5 | PB | Raegan Sellers | U15 | -10 | | Banbury | Banbury | 21 Jul 18 | |
| 228 | 42.51 | | | 42.51 | PB | Amy Dawes | U17 | -8 | George Ogilvie | Winchester | Basingstoke | 9 Jun 18 | |
| 229 | 42.52 | | | 40.73 | | Abigail Fitton | U17 | -6 | Fiona Darling-Glinski | Marshall Milton Keynes | Birmingham | 29 Apr 18 | |
| 230 | 42.53 | i | | 42.53i/41.5 | PB | Angel Gediz | U17 | -8 | | Bexley | Sheffield | 24 Feb 18 | |
| 43.64 | | | | | | | | | | Eltham | 29 Apr 18 | |
| 43.9 | | | | | | | | | | Walton | 1 Jul 18 | |
| 230 | 42.53 | | | 42.34 | | Brooke Coldwell | U17 | -7 | Brian O'Hare | Exeter | Exeter | 9 Jun 18 | |
| 230 | 42.53 | | | 40.23 | | Olivia Boachie | U15 | -10 | | Havering | Hendon | 8 Jul 18 | |
| 233 | 42.54 | i | | 42.54i | PB | Hannah Stone | U15 | -9 | Catherine Breslin | Bracknell AC | Sheffield | 25 Feb 18 | |
| 42.84 | | | | | | | | | | Eton | 13 May 18 | |
| 42.9 | | | | | | | | | | Reading | 9 Jun 18 | |
| 234 | 42.60 | | | 42.60 | PB | Beth Aitken | U17 | -8 | Paul Allan | Pitreavie | Liverpool | 27 May 18 | |
| 235 | 42.6 | | | 43.19/42.6 | PB | Millie Coy | U17 | -7 | Ramzi Dabbar | Blackburn | Blackburn | 12 May 18 | |
| 43.19 | | | | | | | | | | Leigh | 7 Jul 18 | |
| 235 | 42.6 | | | 43.04/42.6 | PB | Thea Howlett | U17 | -6 | Gareth Hunt | Ryston | Norwich | 12 May 18 | |
| 235 | 42.6 | | | 42.99/42.0 | | Maddie Turner | U17 | -6 | John Miller | Winchester | Bournemouth | 3 Jun 18 | |
| 235 | 42.6 | | | 44.17/42.6 | PB | Ellie Heathcote | U17 | -6 | Christopher Wakeford | Cumbria Schs | Carlisle | 9 Jun 18 | |
| 235 | 42.6 | | | 42.90/42.6 | PB | Erin Nelson | U17 | -6 | | North Shields Poly | Hexham | 9 Jun 18 | |
| 42.90 | | | | | | | | | | Hexham | 15 Jul 18 | |
| 235 | 42.6 | | | 42.64/42.6 | PB | Millie French-Harling | U15 | -9 | Lee Walker | Barnsley AC | Spinkhill | 16 Jun 18 | |
| 43.66 | i | | | | | | | | | Sheffield | 1 Dec 18 | |
| 235 | 42.6 | | | 42.56/42.4 | | Isabelle Kelly | U17 | -6 | Shaun Ainge | Cannock & Stafford | Stoke | 1 Jul 18 | |
| 235 | 42.6 | | | 40.89 | | Ophelia Pye | U15 | -10 | David Hemery | Marlborough Athletics | Swindon | 1 Jul 18 | |
| 42.64 | | | | | | | | | | Birmingham | 13 Jul 18 | |
| 235 | 42.6 | | | 43.61/42.6 | PB | Valentina Costa | U15 | -9 | | Derby | Banbury | 21 Jul 18 | |
| 43.61 | | | | | | | | | | Derby | 21 Apr 18 | |
| 235 | 42.6 | | | 42.19/41.8 | | Chloe Griffith-Mcgeever | U15 | -8 | Barry Edwards | Menai | Bangor | 21 Jul 18 | |
| 43.05 | | | | | | | | | | Cardiff | 14 Jul 18 | |
| 235 | 42.6 | | | 42.68/42.6 | PB | Amani Valli-Carter | U15 | -10 | Peter Crook | Preston | Bebington | 21 Jul 18 | |
| 42.68 | | | | | | | | | | Wakefield | 19 May 18 | |
| 246 | 42.61 | | | 42.14 | | Krystle Balogun | | 9 | Nat Senior | Ilford | Finsbury Park | 31 May 18 | |
| 247 | 42.62 | i | | 42.05i | | Steph Driscoll | U17 | -6 | Stephen Carroll | Liverpool H | Emirates Arena | 28 Jan 18 | |
| 248 | 42.63 | i | | 42.63i/42.4 | PB | Neneh Gardner | U17 | -7 | Alan Hewson | Windsor Slough Eton & Hounslow | Lee Valley | 20 Jan 18 | |
| 248 | 42.63 | | | 42.63 | PB | Sara Diaz de la Fuente | U15 | -8 | Panos Ioannou | Marshall Milton Keynes | Stoke Gifford | 21 Jul 18 | |
| 250 | 42.64 | | | 42.46 | | Poppy Walters | U17 | -8 | | Woking | Crawley | 1 Jul 18 | |
| 251 | 42.66 | | | 42.66 | PB | Teoni Ojibah | U17 | -8 | Jamie Russell | Sheffield & Dearne | Cudworth | 12 May 18 | |
| 252 | 42.67 | i | | 42.67i | PB | Michelle Owusu | U20 | -7 | Howard Court | Wolverhampton & Bilston | Sheffield | 1 Dec 18 | |
| 43.06 | | | | | | | | | | Tipton | 15 Apr 18 | |
| 252 | 42.67 | i | | 41.14 | | Christina Brend | U23 | -3 | Mark Brace | North Devon | Cardiff | 16 Dec 18 | |
| 254 | 42.68 | | | 42.68 | PB | Esther Fatuade | U17 | -7 | Ty Holden | Shaftesbury Barnet | Hendon | 5 Aug 18 | |
| 254 | 42.68 | | | 41.21 | | Silver Nwabuzor | U15 | -9 | | Glasgow Sch of Sport | Aberdeen | 19 Aug 18 | |
| 256 | 42.70 | | | 41.38 | | Petra Sijuwade | U17 | -6 | Leonard Allbrighton | Stevenage & North Herts | Lee Valley | 8 Jul 18 | |
| 257 | 42.7 | | | 41.95/40.9 | | Uche Okpalauko | U15 | -9 | Darren Priestley | Havering | Gateshead | 7 Jul 18 | |
| 42.72 | | | | | | | | | | Chelmsford | 9 Jun 18 | |
| 257 | 42.7 | | | 43.27/42.7 | PB | Megan Pickup | U15 | -9 | | Reading AC | Hornchurch | 21 Jul 18 | |
| 43.27 | | | | | | | | | | Bracknell | 21 Apr 18 | |
| 257 | 42.7 | | | 41.23 | | Erin Bracknell | U15 | -9 | David Buckett | Crawley | Brighton | 31 Aug 18 | |
| 42.71 | | | | | | | | | | Crawley | 12 May 18 | |
| 260 | 42.72 | | | 42.72 | PB | Lucy Perkins | U17 | -8 | | Vale of Aylesbury | Horspath | 12 May 18 | |
| 260 | 42.72 | | | 42.72 | PB | Niamh Roberts | U17 | -7 | Chris Franklin | Llanelli | Neath | 20 May 18 | |
| 262 | 42.73 | | | 42.73 | PB | Lauren Etchells | U15 | -9 | Peter Wileman | Durham | Gateshead | 15 Apr 18 | |
| 262 | 42.73 | | | 42.30/42.2 | | Natasha Bennett | U17 | -6 | | Bracknell AC | Eton | 1 Jul 18 | |
| 262 | 42.73 | | | 42.73 | PB | Erin McMahon | U17 | -7 | | Ballymena & Antrim | Belfast | 7 Jul 18 | |
| 265 | 42.74 | | | 41.62 | | Anna Dornbusch | U17 | -7 | Julia Machin | Brighton & Hove | Crawley | 1 Apr 18 | |
| 265 | 42.74 | | | 41.33i | | Stephanie Brooks | U15 | -8 | Martin Fisher | North Somerset | Birmingham | 13 Jul 18 | |
| 265 | 42.74 | | | 42.66 | | Lea Reyna-Faria | U15 | -8 | Ty Holden | Shaftesbury Barnet | Hendon | 5 Aug 18 | |
| 268 | 42.75 | | | 41.54 | | Yasmin Robinson | U20 | -5 | Colin Corless | Southend | Lee Valley | 2 Apr 18 | |
| 269 | 42.77 | | | 41.50 | | Emma Barclay | U17 | -7 | | Elgin | Inverness | 12 May 18 | |
| 270 | 42.80 | | | 42.80 | PB | Victoria Johnson | U17 | -6 | Eliska Binks | Charnwood | Loughborough | 8 Apr 18 | |
| 270 | 42.80 | | | 41.17 | | Amarisa Sibley | U15 | -10 | Jay Galley | Blackheath & Bromley | Bromley | 11 Jun 18 | |
| 272 | 42.8 | | | 42.8 | PB | Eleesha Charnley | U15 | -8 | | Blackburn | Blackburn | 12 May 18 | |
| 272 | 42.8 | | | 43.31/42.8 | PB | Abigail Earnshaw | U15 | -8 | | Preston | Litherland | 30 Jun 18 | |
| 272 | 42.8 | | | 39.87 | | Abbie Parker | U15 | -10 | Deborah Keenleyside | Dacorum | Hemel Hempstead | 9 Sep 18 | |
| 275 | 42.82 | i | | 42.82i/42.6 | PB | Rebecca Walkden | U23 | -3 | | Wigan & District | Sportcity | 7 Jan 18 | |
| 276 | 42.84 | | | 42.84 | PB | Ailsa Innes | U20 | -5 | Andy Young | Lasswade | Meadowmill | 1 Sep 18 | |
| 277 | 42.86 | | 0.0 | 42.86 | PB | Toritse Etuwewe | U15 | -8 | | Derby | Derby | 28 Jul 18 | |
| 278 | 42.87 | i | | 42.87i | PB | Cynthia Agbor | U20 | -7 | | Wolverhampton & Bilston | Sheffield | 1 Dec 18 | |
| 279 | 42.88 | | | 42.88/42.6 | PB | Emma Horsey | U17 | -8 | Andrew Kennard | Walton | Kingston | 12 May 18 | |
| 280 | 42.89 | i | | 42.89i | PB | Fredrica Peart | | 8 | | Sale Harriers Manchester | Sportcity | 7 Jan 18 | |
| 280 | 42.89 | | | 41.65 | | Kia-Licia Clarkson | U15 | -9 | | Sale Harriers Manchester | Wakefield | 19 May 18 | |
| 280 | 42.89 | | | 42.89 | PB | Abigail Walters | U17 | -7 | Steven Munday | Medway & Maidstone | Gillingham | 15 Jul 18 | |
| 283 | 42.90 | | | 42.90 | PB | Mya Meadows-Smith | U15 | -8 | | Hampshire Schs | Basingstoke | 9 Jun 18 | |
| 283 | 42.90 | i | | 40.35 | | Favour Joseph | U15 | -11 | Anita Richardson | Sale Harriers Manchester | Sportcity | 16 Dec 18 | |
| 285 | 42.9 | | | 41.87 | | Amelia Spry | U17 | -7 | | City of Portsmouth | Portsmouth | 1 Apr 18 | |
| 285 | 42.9 | | | 42.05 | | Amy Taylor | U20 | -4 | Nick Dakin | Tonbridge | Tonbridge | 2 Apr 18 | |
| 285 | 42.9 | | | 43.35/42.9 | PB | Jasmine Ferguson | U15 | -8 | | Bedford & County | Mile End | 19 May 18 | |
| 43.94 | | | | | | | | | | Bedford | 21 Apr 18 | |
| 285 | 42.9 | | | 42.49 | | Eloise Longhurst | U17 | -8 | Roy Hayward | Worthing | Brighton | 27 May 18 | |
| 42.93 | | | | | | | | | | Crawley | 12 May 18 | |
| 285 | 42.9 | | | 44.35/42.9 | PB | Eleanor Duncan | U17 | -6 | Mike Bennett | Worcester | Worcester | 9 Jun 18 | |
| 285 | 42.9 | | | 42.9 | PB | Sophia Malpass | U17 | -7 | | Wrekin College Triathlon Club | Solihull | 1 Jul 18 | |
| 285 | 42.9 | | | 42.95/42.9 | PB | Holly Bigger | U17 | -7 | Simon Prior | Wells City | Yeovil | 1 Jul 18 | |
| 42.95 | | | | | | | | | | Yeovil | 9 Jun 18 | |
| 285 | 42.9 | | | 43.66/42.9 | PB | Madeleine Tatham | U15 | -10 | Joe McColgan | Amber Valley & Erewash | Abingdon | 8 Jul 18 | |
| 43.66 | | | | | | | | | | Derby | 2 Jun 18 | |
| 285 | 42.9 | | | 43.78/42.9 | PB | Heidi Tanyi | U17 | -7 | Jane Farrier | Nuneaton | Dudley | 8 Jul 18 | |
| 43.78 | | | | | | | | | | Nuneaton | 12 Aug 18 | |
| 285 | 42.9 | | | 43.22/42.9 | PB | Christie Allen | U15 | -8 | Duncan Mason | Salford H | Bangor | 21 Jul 18 | |
| 43.39 | | | | | | | | | | Stretford | 9 Jun 18 | |
| 285 | 42.9 | | | 43.50/42.9 | PB | Katie Goldsmith | U17 | -7 | Peter Gore | City of Norwich | Peterborough | 12 Aug 18 | |
| 296 | 42.92 | i | | 42.45i | | Precious Adu | U17 | -7 | Darren Braithwaite | Enfield & Haringey | Lee Valley | 18 Mar 18 | |
| 296 | 42.92 | i | | 42.86 | | Elyse Leech | U20 | -5 | Stephen Cottle | Torbay | Cardiff | 16 Dec 18 | |
| 298 | 42.93 | i | | 41.36/41.3 | | Sophie Anderson | U17 | -8 | Colin Corless | Southend | Lee Valley | 2 Dec 18 | |
| 43.40 | | | | | | | | | | Chelmsford | 12 May 18 | |
| 43.4 | | | | | | | | | | Gateshead | 7 Jul 18 | |
| 299 | 42.94 | i | | 41.52 | | Teresa Iannetelli | U20 | -4 | | Swindon | Cardiff | 16 Dec 18 | |
| 300 | 42.95 | | | 42.95 | PB | Maxine Williams | U17 | -7 | Steve Mitchell | Chelmsford | Chelmsford | 12 May 18 | |
| 300 | 42.95 | | | 42.95/42.9 | PB | Zena Challenger | U17 | -6 | John Skevington | Wreake & Soar Valley | Loughborough | 30 May 18 | |
| 300 | 42.95 | i | | 42.95i | PB | Isobel Mills | U20 | -4 | Martin Cook | Orion | Sheffield | 1 Dec 18 | |
| 303 | 42.96 | i | | 42.96i/42.7 | PB | Isabella Or Kam Fat | U20 | -7 | Lee Walker | Sheffield & Dearne | Sheffield | 1 Dec 18 | |
| 304 | 42.97 | i | | 42.21 | | Rhea Campbell | U20 | -6 | Ryan McAllister | Giffnock North | Emirates Arena | 8 Feb 18 | |
| 304 | 42.97 | | | 41.72 | | Eleanor Rayner | U15 | -9 | | Wakefield | Middlesbrough | 2 Sep 18 | |
| 306 | 42.98 | | | 42.98 | PB | Megan Briggs | U17 | -8 | | North Down | Belfast | 7 Jul 18 | |
| 307 | 42.99 | | | 42.99 | PB | Freya Taylor | U15 | -8 | Sue Green | Epsom & Ewell | Kingston | 9 Jun 18 | |
| 307 | 42.99 | i | | 42.99i | PB | Abigail Pawlett | U17 | -8 | Joe Frost | Stockport | Sheffield | 1 Dec 18 | |
| 309 | 43.0 | | | 43.02/42.4 | | Amelia Bell | U17 | -6 | Richard Holt | Kingston & Poly | Epsom | 5 May 18 | |
| 43.02 | | | | | | | | | | Crawley | 1 Jul 18 | |
| 309 | 43.0 | | | 43.27/43.0 | PB | Laila-Marie Latin | U17 | -8 | | Guildford & Godalming | Kingston | 27 May 18 | |
| 43.27 | | | | | | | | | | Crawley | 1 Jul 18 | |
| 309 | 43.0 | | | 43.22/43.0 | PB | Grace Pitman | U17 | -8 | Mark Wanklyn | Cheltenham | Cheltenham | 9 Jun 18 | |
| 309 | 43.0 | | | 43.13i/43.0 | PB | Emily Jackson | U17 | -7 | | Warrington AC | Warrington | 9 Jun 18 | |
| 43.13 | i | | | | | | | | | Sportcity | 18 Mar 18 | |
| 43.14 | | | | | | | | | | Leigh | 7 Jul 18 | |
| 309 | 43.0 | | | 43.95/43.0 | PB | Alex Beale | U17 | -6 | Antoinette Inniss-Haycox | Kettering | Banbury | 24 Jun 18 | |
| 309 | 43.0 | | | 44.45/43.0 | PB | Emily Sanderson | U20 | -4 | | Daventry | Nuneaton | 24 Jun 18 | |
| 309 | 43.0 | | | 43.87/43.0 | PB | Imogen Blackwell | U15 | -10 | Peter Crook | Preston | Litherland | 30 Jun 18 | |
| 309 | 43.0 | | | 43.33/43.0 | PB | Lily Saxon | U15 | -9 | Stuart Albutt | Solihull & Small Heath | Banbury | 21 Jul 18 | |
| 43.90 | | | | | | | | | | Nuneaton | 12 Aug 18 | |
| 317 | 43.01 | | | 42.56i | | Iona Esslemont | U17 | -8 | Nigel Reynolds | Dundee Hawkhill | Liverpool | 27 May 18 | |
| 317 | 43.01 | | | 42.45 | | Ellie Loweth | U15 | -9 | | Carmarthen | Cardiff | 7 Jul 18 | |
| 319 | 43.02 | | | 43.02 | PB | Jessica Moore | U15 | -8 | Karen Murphy | Shaftesbury Barnet | Hendon | 8 Jul 18 | |
| 320 | 43.05 | i | | 42.73i | | Daisy Worthington | U17 | -8 | Joe Frost | Bury | Sheffield | 24 Feb 18 | |
| 320 | 43.05 | | 0.9 | 43.05 | PB | Carys Poole | U15 | -8 | Tony Morris | Swansea | Neath | 3 Jun 18 | |
| 322 | 43.06 | | | 42.95 | | Olivia Lowrie | U17 | -6 | | Wycombe | Horspath | 12 May 18 | |
| 322 | 43.06 | | | 43.06 | PB | Hannah Hutchinson | U15 | -8 | | Deeside AAC | Cardiff | 7 Jul 18 | |
| 324 | 43.07 | | | 43.07 | PB | Isobel Orencas | U15 | -10 | | Wreake & Soar Valley | Loughborough | 25 Aug 18 | |
| 325 | 43.08 | | | 43.08 | PB | Jessica Clark | U15 | -9 | | Cambridge & Coleridge | Hendon | 5 Aug 18 | |
| 326 | 43.10 | | | 42.88/42.1 | | Marina Semple | U15 | -9 | | Radley | Horspath | 12 May 18 | |
| 326 | 43.10 | | | 43.10 | PB | Zoe Rixson | U17 | -8 | | Basildon | Chelmsford | 9 Jun 18 | |
| 328 | 43.1 | | | 44.48i/43.1 | PB | Emily Michael | U17 | -7 | Tony John | Neath | Swansea | 8 Apr 18 | |
| 328 | 43.1 | | | 44.32i/43.1 | PB | Ruby Spencer | U15 | -9 | Joe Frost | Macclesfield | Leigh | 21 Apr 18 | |
| 328 | 43.1 | | | 43.1 | PB | Kayleigh Watson | U15 | -9 | | Carlisle Aspatria | Hyndburn | 26 May 18 | |
| 328 | 43.1 | | | 43.62i/43.0 | | Emily MacTaggart | U17 | -6 | | Charnwood | Nottingham | 27 May 18 | |
| 328 | 43.1 | | | 43.11/43.1 | PB | Lauren Simpson | U17 | -8 | Sidney Clark | Herts Phoenix | Colchester | 3 Jun 18 | |
| 43.11 | | | | | | | | | | Hemel Hempstead | 9 Jun 18 | |
| 328 | 43.1 | | | 43.17/42.5 | | Holly Paine | U17 | -6 | | Yeovil | Bournemouth | 9 Jun 18 | |
| 43.19 | | | | | | | | | | Exeter | 6 May 18 | |
| 328 | 43.1 | | | 42.89/42.7 | | Amelia Proctor | U15 | -9 | | Scunthorpe & District AC (Defunct) | Hull | 30 Jun 18 | |
| 43.88 | | | | | | | | | | Hull | 12 May 18 | |
| 328 | 43.1 | | | 43.20/43.1 | PB | Amelia Hucks | U15 | -8 | | Menai | Bangor | 21 Jul 18 | |
| 328 | 43.1 | | | 42.52i | | Grace Brennan | U15 | -8 | | Team East Lothian | Grangemouth | 28 Jul 18 | |
| 43.18 | | | | | | | | | | Grangemouth | 29 Jul 18 | |
| 328 | 43.1 | | | 43.15/43.1 | PB | Ella Margetts | U17 | -8 | | Enfield & Haringey | St. Albans | 5 Aug 18 | |
| 43.15 | | | | | | | | | | Woodford | 1 Jul 18 | |
| 338 | 43.12 | | | 42.85 | | Yasmin Palmer | U17 | -8 | Jane Dixon | Shaftesbury Barnet | Peterborough | 30 Jun 18 | |
| 339 | 43.13 | | | 39.19 | | Jessica Astill | U15 | -10 | | Stevenage & North Herts | Hemel Hempstead | 9 Jun 18 | |
| 340 | 43.14 | | | 43.14 | PB | Suzy Neill | U17 | -7 | | Banbridge | Belfast | 2 May 18 | |
| 340 | 43.14 | | | 43.14 | PB | Jessica Lake | U17 | -7 | | Mansfield | Nottingham | 13 May 18 | |
| 340 | 43.14 | | | 42.10 | | Isabella Merritt | U15 | -10 | Andy Townsend | Horwich | Stretford | 28 May 18 | |
| 340 | 43.14 | | | 43.14 | PB | Daisy Weiser | U15 | -9 | George Freeman-Austin | Reading AC | Reading | 17 Jun 18 | |
| 340 | 43.14 | i | | 40.73 | | Megan Webber | U20 | -6 | Stephen Cottle | Torbay | Cardiff | 16 Dec 18 | |
| 345 | 43.15 | | | 43.15 | PB | Ruby Bell | U15 | -8 | Trevor Painter | Sale Harriers Manchester | Stretford | 28 May 18 | |
| 345 | 43.15 | i | | 42.31 | | Bronwyn Mooney | U17 | -9 | John Smith | Rotherham | Sheffield | 1 Dec 18 | |
| 345 | 43.15 | i | | 43.15i | PB | Gemima Eshimu Massamba | U20 | -5 | | Ilford | Lee Valley | 2 Dec 18 | |
| 348 | 43.16 | i | | 41.97 | | Jessica Sheppard | U20 | -5 | Michael Sheppard | Stratford-upon-Avon | Sheffield | 1 Dec 18 | |
| 349 | 43.17 | | | 42.31 | | Evie Watkins | U15 | -10 | Arwyn Davies | Barry & Vale | Cardiff | 23 May 18 | |
| 349 | 43.17 | | | 43.17 | PB | Victoria Smith | U17 | -8 | | Woking | Crawley | 25 Jul 18 | |
| 349 | 43.17 | | | 43.17 | PB | Ffion Davies | U17 | -7 | | Pembrokeshire | Swansea | 29 Jul 18 | |
| 349 | 43.17 | | | 43.17 | PB | Lydia Bonshor | U17 | -6 | Joseph McDonnell ☘️ | Charnwood | Loughborough | 25 Aug 18 | |
| 353 | 43.20 | | | 42.51 | | Rhiannon Dowinton | U17 | -7 | Nick Marley | Guernsey | St. Peter Port | 16 Aug 18 | |
| 354 | 43.2 | | | 41.38 | | Madeline Wilton | U17 | -7 | Terence Price | City of Portsmouth | Portsmouth | 1 Apr 18 | |
| 354 | 43.2 | | | 42.67/42.6 | | Olivia Willmore | U17 | -7 | Dean Exton | Dorchester | Horspath | 22 Apr 18 | |
| 43.61 | | | | | | | | | | Exeter | 6 May 18 | |
| 354 | 43.2 | | | 43.2 | PB | Molly Hudson | U17 | -7 | Helen Clitheroe | Derby | Derby | 8 May 18 | |
| 354 | 43.2 | | | 43.51i/43.2 | PB | Dijana Clarke | U17 | -6 | | Worcester | Nottingham | 27 May 18 | |
| 354 | 43.2 | | | 42.83/42.3 | | Natasha Cookson | U17 | -8 | Christopher Wakeford | Cumbria Schs | Carlisle | 9 Jun 18 | |
| 354 | 43.2 | | | 43.2 | PB | Ashonte Ferguson | U17 | -7 | | Berkshire Schs | Reading | 9 Jun 18 | |
| 354 | 43.2 | | | 43.77/43.2 | PB | Sarah Brett | U17 | -6 | Lee Ness | City of Salisbury | Basingstoke | 1 Jul 18 | |
| 43.77 | | | | | | | | | | Basingstoke | 18 Jul 18 | |
| 354 | 43.2 | | | 42.39i | | Lydia Morris | U17 | -8 | Graham Davies | Northern (Isle of Man) | Douglas | 14 Jul 18 | |
| 354 | 43.2 | | | 43.38/43.2 | PB | Lucy Tunnacliffe | U17 | -7 | John Shepherd | Kingston & Poly | Carshalton | 25 Aug 18 | |
| 354 | 43.2 | | | 43.70/43.2 | PB | Jemima Bestley | U15 | -8 | Eddison Williams | Ipswich | Bury St Edmunds | 16 Sep 18 | |
| 364 | 43.21 | | | 43.21 | PB | Ursula Hall | U17 | -8 | James McDonald | Herne Hill | Battersea | 9 Jun 18 | |
| 364 | 43.21 | | | 43.21 | PB | Sophie Grant | U15 | -8 | | Orion | Woodford | 17 Jun 18 | |
| 366 | 43.22 | | | 42.44 | | Isobel Geere | U15 | -9 | | Stevenage & North Herts | Hemel Hempstead | 9 Jun 18 | |
| 367 | 43.23 | | | 42.75 | | Rose Chaplin | U17 | -7 | Christopher Voice | Eastbourne | Crawley | 12 May 18 | |
| 367 | 43.23 | | | 43.23 | PB | Ellie Gilder | U15 | -8 | Paul Herrington | Reading AC | Bromley | 19 May 18 | |
| 367 | 43.23 | | | 41.91/41.7 | | Sophie Forbes-Laird | U15 | -10 | James Webster | Biggleswade | Sandy | 29 Sep 18 | |
| 370 | 43.25 | | | 43.25 | PB | Rachel Muir | U15 | -9 | Arthur Smith | Kilbarchan | Kilmarnock | 20 May 18 | |
| 371 | 43.26 | | | 43.26 | PB | Cariad Norris | U15 | -9 | | Guildford & Godalming | Birmingham | 3 Jul 18 | |
| 371 | 43.26 | | | 43.26 | PB | Catrin Powell Jones | U17 | -7 | Alwyn Roberts | Menai | Cardiff | 7 Jul 18 | |
| 373 | 43.28 | | | 43.28 | PB | Rosie Domican | U15 | -9 | | Cardiff Archers | Cardiff | 23 May 18 | |
| 373 | 43.28 | | | 43.28 | PB | Maya Shankar | U17 | -7 | | City of Portsmouth | Basingstoke | 9 Jun 18 | |
| 375 | 43.3 | | | 44.01/43.3 | PB | Sola Taiwo | U17 | -7 | Karl Sumun | Thurrock | Colchester | 3 Jun 18 | |
| 375 | 43.3 | | | 43.98/43.3 | PB | Amelia Metcalf | U15 | -9 | | Seaton | Carlisle | 9 Jun 18 | |
| 43.98 | | | | | | | | | | Gateshead | 16 Jun 18 | |
| 375 | 43.3 | | | 43.61/43.3 | PB | Rosana Ercilla | U17 | -8 | Paul Herrington | Reading AC | Reading | 9 Jun 18 | |
| 43.61 | | | | | | | | | | Eton | 1 Jul 18 | |
| 375 | 43.3 | | | 44.34/43.3 | PB | Hannah Pickup | U17 | -7 | | Reading AC | Basingstoke | 8 Jul 18 | |
| 375 | 43.3 | | | 42.19 | | Amy Greig | U15 | -9 | Remy Bosman | St. Mary's Richmond | Hemel Hempstead | 21 Jul 18 | |
| 43.93 | | | | | | | | | | Bedford | 21 Apr 18 | |
| 375 | 43.3 | | | 44.42/43.3 | PB | Shanice Thompson | U15 | -8 | | Luton | Hemel Hempstead | 21 Jul 18 | |
| 375 | 43.3 | | | 42.11 | | Shona McLay | U17 | -8 | | Central | Grangemouth | 15 Sep 18 | |
| 382 | 43.31 | | | 42.61 | | Holly Fowler | U15 | -8 | Stephen Humberstone | Hallamshire | Cudworth | 12 May 18 | |
| 382 | 43.31 | | | 43.31 | PB | Jessica Tabraham | U17 | -8 | James McDonald | Herne Hill | Kingston | 12 May 18 | |
| 382 | 43.31 | | | 43.31 | PB | Zoe St John | U15 | -8 | | Hertfordshire Schs | Hemel Hempstead | 9 Jun 18 | |
| 385 | 43.32 | | | 42.73i | | Sharon Jakisa | U23 | -1 | Eddie McKenna | Unattached | Aberdeen | 16 May 18 | |
| 385 | 43.32 | | | 43.32 | PB | Emily Burch | U17 | -8 | | Guildford & Godalming | Crawley | 1 Jul 18 | |
| 387 | 43.33 | | | 43.33/43.2 | PB | Alex Spurway | U15 | -9 | | Leamington Athletics Academy | Nuneaton | 12 May 18 | |
| 387 | 43.33 | | | 42.91 | | Mia Liddell | U15 | -8 | Daniel Njai-Rowney | Blyth | Middlesbrough | 13 May 18 | |
| 389 | 43.35 | i | | 43.35i | PB | Catriona McPheat | U17 | -6 | Jamie Bowie | Team East Lothian | Emirates Arena | 8 Feb 18 | |
| 43.68 | | | | | | | | | | Liverpool | 27 May 18 | |
| 390 | 43.36 | i | | 42.26 | | Holly Peltier | U20 | -5 | Duncan Mason | Salford H | Sportcity | 18 Mar 18 | |
| 390 | 43.36 | i | | 43.36i | PB | Sophie Warden | U23 | -3 | Peter Warden | Preston | Sportcity | 18 Mar 18 | |
| 392 | 43.38 | | | 43.27 | | Charlotte Clare | U17 | -7 | | Moorfoot | Grangemouth | 6 May 18 | |
| 392 | 43.38 | | | 43.38 | PB | Ellen Pearce | U17 | -8 | | Dorchester | Exeter | 8 Jul 18 | |
| 394 | 43.39 | | | 41.93 | | Katie Johnson | U15 | -10 | | Edinburgh AC | Bedford | 8 Sep 18 | |
| 395 | 43.4 | | | 42.75 | | Sarah Reece | U20 | -5 | Adrian Weston | Aldershot, Farnham & District | Eton | 25 Mar 18 | |
| 395 | 43.4 | | | 41.05 | | Emily Bee | U17 | -7 | David Bee | City of Plymouth | Plymouth | 1 Apr 18 | |
| 395 | 43.4 | | | 43.10 | | Abbie Jones | U17 | -7 | Simon Goldfinch | Maidenhead | Reading | 15 Apr 18 | |
| 395 | 43.4 | | | 42.22/42.0 | | Katie Liptrot | U17 | -6 | David Rice | Hertford & Ware | Grays | 6 May 18 | |
| 43.73 | | | | | | | | | | Hemel Hempstead | 9 Jun 18 | |
| 395 | 43.4 | | | 43.61/43.4 | PB | Leah Jay | U15 | -9 | | Luton | Bedford | 13 May 18 | |
| 395 | 43.4 | | | 45.03/43.4 | PB | Emmeline Viala | U15 | -10 | | Harrow | Mile End | 19 May 18 | |
| 395 | 43.4 | | | 44.18/43.4 | PB | Grace Drummond | U17 | -8 | Stephen Carroll | Liverpool H | Bebington | 9 Jun 18 | |
| 395 | 43.4 | | | 43.82/43.4 | PB | Emma Wood | U15 | -9 | Mike Stayman | Leeds City | Ellesmere Port | 17 Jun 18 | |
| 43.82 | | | | | | | | | | Wakefield | 23 May 18 | |
| 395 | 43.4 | | | 42.82 | | Charlotte Underwood | U15 | -9 | Barry Hearn | Marshall Milton Keynes | Rugby | 17 Jun 18 | |
| 43.53 | | | | | | | | | | Coventry | 19 May 18 | |
| 395 | 43.4 | | | 43.1 | | Zuri Mullings | U17 | -6 | | Windsor Slough Eton & Hounslow | Basingstoke | 8 Jul 18 | |
| 395 | 43.4 | | | 45.28/43.4 | PB | Ellie Livingstone | U17 | -6 | John Miller | Winchester | Bournemouth | 8 Jul 18 | |
| 406 | 43.41 | | | 42.37 | | Devon Mather | U20 | -4 | George Male | Basingstoke & Mid Hants | Basingstoke | 7 Apr 18 | |
| 406 | 43.41 | | | 43.41 | PB | Elizabeth Bentham | U17 | -7 | Catrina Lewis | Luton | Hendon | 8 Jul 18 | |
| 408 | 43.42 | | | 43.42 | PB | Bluebell Cooke | U17 | -8 | Catrina Lewis | Shaftesbury Barnet | Stevenage | 7 May 18 | |
| 408 | 43.42 | | | 43.42 | PB | Daisy Coulson-Bascombe | U15 | -10 | | Huntingdonshire | Birmingham | 3 Jul 18 | |
| 408 | 43.42 | | | 43.08 | | Isla Brown | U15 | -10 | Alan Hewson | Windsor Slough Eton & Hounslow | Lee Valley | 11 Aug 18 | |
| 411 | 43.43 | i | | 43.43i | PB | Kristie Archer | U17 | -8 | Martin Bishell | Wombwell | Sheffield | 13 Jan 18 | |
| 43.78 | | | | | | | | | | Cudworth | 12 May 18 | |
| 43.9 | | | | | | | | | | Rotherham | 22 Apr 18 | |
| 411 | 43.43 | | | 43.43 | PB | Chloe Freilinger | U17 | -8 | | Salford H | Leigh | 7 Jul 18 | |
| 413 | 43.44 | i | | 43.44i | PB | Eva Blues | U17 | -7 | | Giffnock North | Emirates Arena | 17 Mar 18 | |
| 414 | 43.45 | | | 42.90 | | Erin Hughes | U15 | -8 | Steve Fury | Medway & Maidstone | Gillingham | 17 Jun 18 | |
| 415 | 43.47 | | | 43.47 | PB | Nia Riley | U17 | -7 | Dan Nash | Cardiff Archers | Cardiff | 12 May 18 | |
| 415 | 43.47 | | | 43.47/43.3 | PB | Amber Threlfall | U15 | -8 | | Birchfield H | Coventry | 19 May 18 | |
| 415 | 43.47 | | | 43.16 | | Jessica O'Flaherty | U17 | -8 | Kim Milnthorpe | Horsham Blue Star | Crawley | 9 Jun 18 | |
| 415 | 43.47 | | | 43.47 | PB | Patricia Stanfield | U15 | -9 | Ian Willoughby | Gloucester | Exeter | 16 Jun 18 | |
| 415 | 43.47 | | | 43.20 | | Chloe Eames | U17 | -8 | Dwayne Stoddart | Reading AC | Basingstoke | 18 Jul 18 | |
| 420 | 43.48 | i | | 42.83i | | Becky Richards | U17 | -8 | Brian Hopkins | Orion | Lee Valley | 4 Feb 18 | |
| 420 | 43.48 | | | 42.35i/42.3 | | Hermione Mason | U15 | -10 | David Lowe | Sale Harriers Manchester | Liverpool | 11 Aug 18 | |
| 422 | 43.49 | | | 43.08 | | Mia Belton | U15 | -10 | | Morpeth | Hexham | 15 Jul 18 | |
| 423 | 43.50 | i | | 41.35 | | Chanelle Cole | U17 | -7 | Gary Capon | Dartford H | Lee Valley | 20 Jan 18 | |
| 43.84 | | | | | | | | | | Dartford | 27 Aug 18 | |
| 423 | 43.50 | | | 43.50 | PB | Amber Williams | U17 | -7 | Jason Michael Quirke | Bridgend | Newport | 24 Jun 18 | |
| 425 | 43.5 | | | 42.33/42.3 | | Drew Illingworth-Turner | U17 | -6 | Peter Crook | Preston | Bebington | 29 Apr 18 | |
| 425 | 43.5 | | | 44.08/43.5 | PB | Amber Park | U17 | -7 | Russell Prosser | Nene Valley | Ware | 6 May 18 | |
| 425 | 43.5 | | | 43.5 | PB | Holly Howson | U17 | -6 | | Carlisle Aspatria | Carlisle | 12 May 18 | |
| 425 | 43.5 | | | 43.52/43.5 | PB | Beatrice Maynard | U17 | -7 | Mark Andrews | Holland Sports AC | Erith | 27 May 18 | |
| 425 | 43.5 | | | 43.5 | PB | Teoni Jibah | U17 | -6 | | South Yorkshire Schs | Doncaster | 9 Jun 18 | |
| 425 | 43.5 | | | 44.59/43.5 | PB | Helena Louise Da Costa | U17 | -7 | | Harrogate | York | 9 Jun 18 | |
| 425 | 43.5 | | | 42.70 | | Stephanie Jones | U15 | -9 | Daniel Gilroy | West Cheshire | Ellesmere Port | 17 Jun 18 | |
| 425 | 43.5 | | | 44.38/43.5 | PB | Amelia Smith | U15 | -9 | Graham Felton | Royal Sutton Coldfield | Banbury | 21 Jul 18 | |
| 425 | 43.5 | | | 43.56/43.0 | | Ashleigh Sidney | U15 | -9 | | Vale of Aylesbury | Hemel Hempstead | 21 Jul 18 | |
| 425 | 43.5 | | | 40.66 | | Emmanuella Quaye | U15 | -10 | Darren Braithwaite | Enfield & Haringey | St. Albans | 5 Aug 18 | |
| 425 | 43.5 | | | 44.65/43.4 | | Ella Robinson | U17 | -8 | Denise Korkmaz | Nene Valley | Braintree | 12 Aug 18 | |
| 436 | 43.51 | | | 42.44/42.2 | | Lauren Blakey | U20 | -6 | Paul Blakey | Derby | Derby | 8 May 18 | |
| 436 | 43.51 | | | 43.51 | PB | Ellie Chivers | U15 | -8 | | Mendip | Yeovil | 12 May 18 | |
| 436 | 43.51 | i | | 42.63i | | Karen Mayindu | U17 | -8 | Tamunonengiye-Ofori Ossai | BFT Track Academy | Lee Valley | 2 Dec 18 | |
| 439 | 43.52 | | | 43.52 | PB | Dani Mauchlen | U15 | -9 | Steven Alan Thompson | Pitreavie | Grangemouth | 20 May 18 | |
| 440 | 43.54 | | | 41.85 | | Neve Woodward | U15 | -10 | | Rushcliffe | Nuneaton | 12 Aug 18 | |
| 441 | 43.55 | i | | 41.39 | | Maisie Rixon | U17 | -7 | Mark Ormerod | Tonbridge | Lee Valley | 20 Jan 18 | |
| 441 | 43.55 | | | 43.55 | PB | Katelyn Emily Henry | U17 | -8 | | Deeside AAC | Newport | 24 Jun 18 | |
| 443 | 43.56 | i | | 43.56i | PB | Emma Stentz Hansen | U17 | -8 | | Cheltenham | Lee Valley | 20 Jan 18 | |
| 443 | 43.56 | | | 43.56 | PB | Kessi Hodgins-Peka | U15 | -10 | | Sutton & District | Kingston | 9 Jun 18 | |
| 445 | 43.58 | i | | 42.30i | | Jessica Waters | U20 | -5 | | Sutton-in-Ashfield | Sheffield | 25 Nov 18 | |
| 446 | 43.59 | | | 42.91 | | Rosie Hughes | U15 | -9 | Lee Cleary-Morgan | North Shields Poly | Middlesbrough | 13 May 18 | |
| 447 | 43.6 | | | 43.3 | | Catherine Obla | U17 | -6 | | City of Portsmouth | Portsmouth | 1 Apr 18 | |
| 447 | 43.6 | | | 43.6 | PB | Alice Hill | U17 | -7 | Michael Utting | City of Norwich | Norwich | 12 May 18 | |
| 447 | 43.6 | | | 43.69/43.5 | | Fenella Downes | U17 | -7 | | Rugby & Northampton | Nottingham | 27 May 18 | |
| 43.69 | | | | | | | | | | Birmingham | 16 Jun 18 | |
| 447 | 43.6 | | | 43.51 | | Cara Davie | U15 | -9 | Tom Leeson | Banchory Stonehaven | Perth | 27 May 18 | |
| 447 | 43.6 | | | 43.6 | PB | Anika Schwarze-Chintapatla | U17 | -6 | | Easingwold | York | 9 Jun 18 | |
| 447 | 43.6 | | | 44.12/43.6 | PB | Amelia Bates | U15 | -8 | Jason Marchant | Dartford H | Ashford | 8 Jul 18 | |
| 453 | 43.62 | | | 43.62 | PB | Grace Hucknall | U15 | -8 | John Garner | Watford | Watford | 12 May 18 | |
| 453 | 43.62 | | | 43.59 | | Niamh Jones | U17 | -7 | | Swansea | Swansea | 29 Jul 18 | |
| 455 | 43.63 | | | 43.63 | PB | Holly Cook | U17 | -8 | | Wreake & Soar Valley | Loughborough | 30 May 18 | |
| 455 | 43.63 | | | 43.63 | PB | Olivia Berry | U15 | -9 | Andy Frankish | Blackheath & Bromley | Bromley | 11 Jun 18 | |
| 457 | 43.66 | | | 42.04 | | Sadie Blake | U15 | -10 | Ann Hayter | City of Portsmouth | Portsmouth | 12 May 18 | |
| 457 | 43.66 | | | 43.66 | PB | Erin Murray | U17 | -8 | Peter Lane | Cardiff | Cardiff | 27 May 18 | |
| 459 | 43.67 | | | 41.62 | | Cameron Kelly-Gordon | U15 | -10 | | Blackheath & Bromley | Bromley | 11 Jun 18 | |
| 459 | 43.67 | | | 42.19 | | Lucy Fraser | U15 | -8 | Alan Erickson | Perth Strathtay | Grangemouth | 11 Aug 18 | |
| 461 | 43.68 | | | 43.68 | PB | Tayllah Barton-Conde | U15 | -9 | Darren Priestley | Havering | Hendon | 8 Jul 18 | |
| 462 | 43.69 | | | 43.69 | PB | Samidi Nanayakkara | U17 | -8 | Neil Parsley | Exeter | Exeter | 9 Jun 18 | |
| 462 | 43.69 | i | | 42.66/42.5 | | Georgie Bowett | U20 | -4 | Peter Gore | City of Norwich | Lee Valley | 2 Dec 18 | |
| 464 | 43.7 | | | 43.7 | PB | Clara Davies | U17 | -8 | | Eden Runners | Carlisle | 12 May 18 | |
| 464 | 43.7 | | | 43.37 | | Jasmine Greenaway | U17 | -7 | | Charnwood | Corby | 13 May 18 | |
| 43.80 | | | | | | | | | | Loughborough | 13 Jun 18 | |
| 464 | 43.7 | | | 42.71 | | Chyna Stewart | U15 | -9 | | Herne Hill | Tooting Bec | 19 May 18 | |
| 464 | 43.7 | | | 42.15 | | Mia Keogh | U17 | -8 | Keith Geddes | Aberdeen | Perth | 27 May 18 | |
| 464 | 43.7 | | | 42.71i/42.4 | | Eve Garry | U15 | -10 | Alan Erickson | Perth Strathtay | Perth | 27 May 18 | |
| 464 | 43.7 | | | 44.15/43.7 | PB | Samantha Reece | U15 | -10 | | Aldershot, Farnham & District | Basingstoke | 1 Jul 18 | |
| 464 | 43.7 | | | 44.46i/43.5 | | Lela Bendris | U17 | -8 | Peter Crook | Preston | Leigh | 1 Jul 18 | |
| 464 | 43.7 | | | 44.60/43.7 | PB | Darcie Conroy-Warner | U15 | -9 | Brian Darby | Coventry | Abingdon | 8 Jul 18 | |
| 464 | 43.7 | | | 43.22 | | Emily Plimmer | U15 | -9 | | Wakefield | Wakefield | 22 Jul 18 | |
| 464 | 43.7 | | | 43.94/43.7 | PB | Delleah Belgrave | U15 | -10 | Tony Jackson | Swindon | Cheltenham | 25 Jul 18 | |
| 464 | 43.7 | | | 42.61 | | Lucy Kirby | U15 | -9 | Trevor Simcox | Crawley | Horsham | 27 Jul 18 | |
| 475 | 43.71 | | | 42.76 | | Anna Hill | U17 | -7 | | Lagan Valley | Antrim | 18 May 18 | |
| 475 | 43.71 | | | 43.58 | | Hannah Moody | U15 | -9 | | Chesterfield | Derby | 2 Jun 18 | |
| 477 | 43.72 | | | 43.72 | PB | Amani Kohler | U15 | -10 | | Highgate | Hendon | 9 Jun 18 | |
| 478 | 43.74 | | | 42.24 | | Mia O'Hara | U17 | -8 | Barry Morris | Eastbourne | Crawley | 12 May 18 | |
| 478 | 43.74 | | | 43.74 | PB | Evie Mason | U17 | -8 | John Smith | Sheffield & Dearne | Nottingham | 13 May 18 | |
| 478 | 43.74 | | | 43.74 | PB | Gabrielle Garcia | U15 | -8 | | Swansea | Brecon | 11 Jul 18 | |
| 478 | 43.74 | | | 41.74 | | Hannahlise Bolt | U15 | -8 | | Barry & Vale | Cardiff | 14 Jul 18 | |
| 478 | 43.74 | | | 43.74 | PB | Emily Hulyer | U17 | -6 | Glynn Williams | Middlesbrough (Mandale) | Gateshead | 26 Aug 18 | |
| 483 | 43.76 | | | 41.95 | | Amber Dunkley-Darby | U17 | -7 | | Birchfield H | Nuneaton | 12 May 18 | |
| 484 | 43.77 | i | | 43.77i | PB | Holly Mealor | U20 | -6 | Kate Ferguson | Wirral | Sportcity | 18 Mar 18 | |
| 484 | 43.77 | | | 43.77 | PB | Ernesta Amash | U15 | -10 | | Newham & Essex Beagles | Gillingham | 17 Jun 18 | |
| 484 | 43.77 | i | | 42.57/42.0 | | Abigael Bamber | U17 | -9 | Michael Dandy | Southport Waterloo | Sportcity | 2 Dec 18 | |
| 487 | 43.78 | | | 43.58/43.3 | | Isabella Armitage | U17 | -8 | Mick Graham | Cambridge & Coleridge | Peterborough | 12 May 18 | |
| 487 | 43.78 | | | 42.92 | | Skye Marshall | U17 | -7 | Francis Smith | Pitreavie | Scotstoun | 24 Jun 18 | |
| 487 | 43.78 | i | | 43.78i | PB | Dhanisha Banee | U17 | -8 | | Hercules Wimbledon | Lee Valley | 2 Dec 18 | |
| 490 | 43.79 | i | | 41.95i | | Jaime Hood | U20 | -6 | | Ayr Seaforth | Emirates Arena | 8 Feb 18 | |
| 490 | 43.79 | | | 41.79 | | Abigail Phillips | U15 | -10 | Zac Kerin | Bournemouth | Exeter | 22 Jul 18 | |
| 492 | 43.80 | | | 42.67 | | Bathsheba Kayley | U17 | -7 | | Cheltenham | Swansea | 29 Jul 18 | |
| 493 | 43.8 | | | 43.8 | PB | Hollie Thurgood | U17 | -7 | Terence Price | City of Portsmouth | Portsmouth | 1 Apr 18 | |
| 493 | 43.8 | | | 43.8 | PB | Taiwo Eyiowuawi | U20 | -5 | Christopher Harris | Bexley | Tonbridge | 2 Apr 18 | |
| 493 | 43.8 | | | 43.43 | | Ellie Odlin | U17 | -8 | | Louth | Scunthorpe | 29 Apr 18 | |
| 493 | 43.8 | | | 44.72/43.6 | | Jasmine Cant | U17 | -6 | Elaine Phillips | Ipswich | Ipswich | 6 May 18 | |
| 493 | 43.8 | | | 43.4 | | Danielle Whipp | U17 | -7 | Stan Taylor | Blackpool, Wyre & Fylde | Blackpool | 27 May 18 | |
| 493 | 43.8 | | | 45.93i/43.8 | PB | Bethany Smith | U17 | -7 | Julia Machin | Brighton & Hove | Brighton | 27 May 18 | |
| 493 | 43.8 | | | 41.67 | | Jennifer Taylor | U17 | -7 | Peter Wileman | Durham | Jarrow | 9 Jun 18 | |
| 493 | 43.8 | | | 42.94/42.8 | | Emily Dunkley | U15 | -9 | Claire East | City of Portsmouth | Portsmouth | 10 Jun 18 | |
| 493 | 43.8 | | | 43.8 | PB | Ellen Mary Kearney | U15 | -8 | Sarah Kearney | Wirral | Ellesmere Port | 17 Jun 18 | |
| 493 | 43.8 | | | 43.67/43.4 | | Katelyn Howden | U15 | -10 | | Cleethorpes | Wakefield | 24 Jun 18 | |
| 493 | 43.8 | | | 44.45i/43.8 | PB | Imogen Reader | U15 | -8 | Dezz Reynolds | Blackpool, Wyre & Fylde | Litherland | 30 Jun 18 | |
| 493 | 43.8 | | | 43.8 | PB | Beth Eagle-Brown | U17 | -8 | | Lincolnshire Schs | Gateshead | 7 Jul 18 | |
| 493 | 43.8 | | | 42.72/42.7 | | Chloe Jardine | U15 | -9 | John Gates | Bexley | Brighton | 21 Jul 18 | |
| 493 | 43.8 | | | 46.41/43.8 | PB | Jessica Norkett | U17 | -8 | | Thetford | Ipswich | 22 Jul 18 | |
| 493 | 43.8 | | | 44.12/43.8 | PB | Emma Simpson | U17 | -8 | | Altrincham | Litherland | 1 Sep 18 | |
| 508 | 43.81 | | | 42.58/42.5 | | Lucy Maunders | U17 | -7 | Andrejs Safars | Medway & Maidstone | Ashford | 13 May 18 | |
| 508 | 43.81 | | | 43.62 | | Rachel Donnelly | U17 | -8 | | Gateshead | Stretford | 27 May 18 | |
| 508 | 43.81 | | | 43.70 | | Scarlett Kent | U17 | -7 | Jeremy Sothcott | Shaftesbury Barnet | Hendon | 8 Jul 18 | |
| 508 | 43.81 | | | 43.81 | PB | Lowis Johnson | U15 | -8 | | Wrexham | Brecon | 11 Jul 18 | |
| 508 | 43.81 | | | 43.81/43.7 | PB | Robyn Greenway | U17 | -8 | Joanna Evans | Cleethorpes | Liverpool | 11 Aug 18 | |
| 513 | 43.82 | | | 42.86 | | Ellie Krefting | U17 | -6 | Alan Hewson | Windsor Slough Eton & Hounslow | Reading | 29 Apr 18 | |
| 513 | 43.82 | | | 40.81i | | Aislynn Crichton | U17 | -8 | Mark Smith | Fife | Livingston | 22 Aug 18 | |
| 515 | 43.83 | | | 43.83 | PB | Bea Wootten | U17 | -8 | Gareth Davies | Oxford City | Horspath | 12 May 18 | |
| 515 | 43.83 | | | 43.83/43.7 | PB | Djamilla Nkereuwem | U17 | -7 | Carlo Monticolombi | Invicta East Kent | Croydon | 1 Jul 18 | |
| 517 | 43.84 | | | 43.84 | PB | Leah Cameron | U17 | -8 | Janice Hendrie | Inverclyde | Kilmarnock | 12 May 18 | |
| 517 | 43.84 | | | 43.84 | PB | Ellen Woodall | U17 | -7 | | Basingstoke & Mid Hants | Basingstoke | 9 Jun 18 | |
| 519 | 43.85 | i | | 42.07 | | Lucy Revitt | U17 | -6 | Martin Bishell | Hallamshire | Sheffield | 13 Jan 18 | |
| 519 | 43.85 | | | 43.85 | PB | Willow Barna | U17 | -7 | | Oxford City | Horspath | 23 May 18 | |
| 521 | 43.86 | | | 43.37 | | Jemima Kerley | U17 | -6 | | Exeter | Exeter | 13 May 18 | |
| 522 | 43.87 | | | 43.87 | PB | Ella Matthews | U15 | -8 | Peter Witcomb | Brighton & Hove | Crawley | 12 May 18 | |
| 522 | 43.87 | | | 43.87 | PB | Harriet Turner | U17 | -7 | Mark Brace | North Devon | Exeter | 13 May 18 | |
| 524 | 43.88 | i | | 43.88i | PB | Mairi Darroch | U17 | -8 | | Inverness | Emirates Arena | 8 Feb 18 | |
| 524 | 43.88 | | | 43.53/43.5 | | Holly Griffiths-Brown | U17 | -6 | Peter O'Keefe | Radley | Horspath | 12 May 18 | |
| 526 | 43.89 | i | | 41.70 | | Katherine McKenzie | U17 | -9 | John Wildman | Woodford Green Essex Ladies | Lee Valley | 2 Dec 18 | |
| 526 | 43.89 | i | | 42.97 | | Charlotte Wilkinson | U15 | -10 | Joe Frost | | Sportcity | 16 Dec 18 | |
| 528 | 43.90 | | | 43.90 | PB | Emilia Stokes | U15 | -8 | | Invicta East Kent | Ashford | 9 Jun 18 | |
| 529 | 43.9 | | | 44.24/42.5 | | Nadine Starling | U17 | -8 | Brian Darby | Coventry | Telford | 5 May 18 | |
| 529 | 43.9 | | | 43.9 | PB | Kate Willis | U17 | -7 | David Pring | City of Norwich | Grays | 6 May 18 | |
| 529 | 43.9 | | | 44.36/43.9 | PB | Libby Fort | U17 | -7 | | Charnwood | Corby | 13 May 18 | |
| 529 | 43.9 | | | 44.23/43.9 | PB | Alicia Beverley | U15 | -8 | Chris Mole | North Shields Poly | Hexham | 9 Jun 18 | |
| 529 | 43.9 | | | 42.29 | | Lucy Hunt | U15 | -8 | | Jersey | St. Clement | 15 Jul 18 | |
| 43.98 | | | | | | | | | | Portsmouth | 12 May 18 | |
| 529 | 43.9 | | | 43.84 | | Ruby Hancox | U15 | -9 | Stephen O'Brien | Telford AC | Banbury | 21 Jul 18 | |
| 529 | 43.9 | | | 43.9 | PB | Tamia Meggie-Graham | U15 | -8 | Paul Weston | Croydon | Croydon | 21 Jul 18 | |
| 529 | 43.9 | | | 43.67/42.8 | | Madelaine Gillis | U15 | -9 | | Middlesbrough (Mandale) | Middlesbrough | 21 Jul 18 | |
| 529 | 43.9 | | | 41.9 | | Ava Lloyd | U15 | -10 | Trevor Painter | Wigan & District | Wigan | 21 Jul 18 | |
| 529 | 43.9 | | | 43.99/42.4 | | Lottie Hinson | U17 | -7 | | Basildon | Ipswich | 2 Sep 18 | |
| 539 | 43.91 | | | 43.91 | PB | Reese Robinson | U15 | -8 | Carlo Monticolombi | Invicta East Kent | Ashford | 9 Jun 18 | |
| 540 | 43.92 | | | 43.92 | PB | Imogen Hales | U17 | -6 | | North Somerset | Exeter | 27 Mar 18 | |
| 540 | 43.92 | | | 43.53 | | Lucy Loades | U15 | -9 | Andrew Hughes | Bracknell AC | Eton | 13 May 18 | |
| 540 | 43.92 | | | 41.86 | | Alice Geoghegan | U15 | -9 | | Morpeth | Morpeth | 24 Jun 18 | |
| 543 | 43.93 | | | 43.93 | PB | Caitlin Brook | U17 | -8 | | Exeter | Exeter | 9 Jun 18 | |
| 544 | 43.94 | | | 43.94 | PB | Hatty Bell | U17 | -8 | Michael Taylor | Wycombe | Lee Valley | 8 Jul 18 | |
| 545 | 43.96 | i | | 43.96i | PB | Olivia Anderson | U23 | -2 | | Kent Schs | Lee Valley | 2 Dec 18 | |
| 546 | 43.97 | | | 43.97 | PB | Lucy Crossman | U17 | -8 | Richard Caburn | Taunton | Yeovil | 22 Apr 18 | |
| 546 | 43.97 | | | 41.92/41.8 | | Emily Lands | U17 | -8 | Mike Swift | Newton Abbot | Exeter | 6 May 18 | |
| 546 | 43.97 | i | | 43.59 | | Niamh Gillies | U17 | -8 | Thomas Graham | Whitemoss | Emirates Arena | 1 Dec 18 | |
| 549 | 43.98 | i | | 43.80/43.3 | | Cristina Potter | U17 | -6 | Neville Thompson | Shaftesbury Barnet | Lee Valley | 18 Mar 18 | |
| 549 | 43.98 | | | 41.22 | | Holly Kirkwood | U15 | -9 | John Wilson | Victoria Park City of Glasgow | Gothenburg, SWE | 1 Jul 18 | |
| 551 | 43.99 | | | 43.99 | PB | Anouska Fairhurst | U15 | -9 | David Leach | Lewes | Crawley | 12 May 18 | |
| 552 | 44.00 | | | 44.00 | PB | Holly Cook | U17 | -7 | | Derby | Derby | 9 Jun 18 | |
| 553 | 44.0 | | | 44.57/44.0 | PB | Emily Whybrow | U17 | -7 | Paul Herrington | Reading AC | Reading | 2 Apr 18 | |
| 553 | 44.0 | | | 43.59/42.5 | | Rebecca Carter | U20 | -4 | Richard Eastman | Kidderminster & Stourport | Stourport | 8 Apr 18 | |
| 553 | 44.0 | | | 45.19/44.0 | PB | Isobel Mullett | U17 | -7 | | Kidderminster & Stourport | Worcester | 12 May 18 | |
| 553 | 44.0 | | | 44.0 | PB | Matilda Somerville-Cotton | U15 | -8 | Aidan Bailey | Corby | Corby | 13 May 18 | |
| 553 | 44.0 | | | 47.62/44.0 | PB | Katie King | U17 | -7 | | Watford | Peterborough | 3 Jun 18 | |
| 553 | 44.0 | | | 44.37/44.0 | PB | Katie Harris | U17 | -6 | Mike Bennett | Worcester | Worcester | 9 Jun 18 | |
| 553 | 44.0 | | | 44.86i/44.0 | PB | Brogan Beattie | U15 | -9 | | Tweed, Leader, Jed Track | Grangemouth | 23 Jun 18 | |
| 553 | 44.0 | | | 43.25 | | Anna Gionis | U17 | -7 | | Stratford-upon-Avon | Rugby | 24 Jun 18 | |
| 553 | 44.0 | | | 41.02i | | Charlotte Kelsey | U15 | -9 | Glynn Williams | Middlesbrough (Mandale) | Darlington | 26 Jun 18 | |
| 553 | 44.0 | | | 44.77/43.7 | | Clara Higgs | U17 | -7 | Roger Williams | Hillingdon | Perivale | 1 Jul 18 | |
| 553 | 44.0 | | | 43.95 | | Alanah Thoresby | U17 | -8 | Bob Schofield | Kingston upon Hull | Gateshead | 7 Jul 18 | |
| 553 | 44.0 | | | 43.55 | | Holly Bates | U15 | -9 | | Coventry | Abingdon | 8 Jul 18 | |
| 553 | 44.0 | | | 44.03/44.0 | PB | Emily Colyer | U17 | -8 | | Hillingdon | Basingstoke | 8 Jul 18 | |
| 553 | 44.0 | | | 45.27/44.0 | PB | Mary Olayiwola | U17 | -7 | | Colchester H | Norwich | 8 Jul 18 | |
| 553 | 44.0 | | | 44.0 | PB | Katie Crook | U15 | -8 | | Western | Douglas | 14 Jul 18 | |
| 553 | 44.0 | | | 44.0 | PB | Hannah Moat | U17 | -7 | David Walker | Scunthorpe & District AC (Defunct) | Scunthorpe | 23 Sep 18 | |
| 39.77 | | | 39.77 | PB | Rachel McCann | U17 | -6 | Michael Roberts | North Down | Dublin (S), IRL | 23 Jun 18 | |
| 40.83 | i | | 40.83i | PB | Emily Oyekan | U17 | -7 | Joe Frost | Stockport | Sheffield | 24 Feb 18 | |
| 41.59 | | | | | | | | | | Loughborough | 8 Apr 18 | |
| 41.7 | | | | | | | | | | Macclesfield | 12 May 18 | |
| 42.35 | | | 40.91 | | Vanessa Ansuaa | U17 | -8 | Craig Andrew | Shaftesbury Barnet | Hendon | 8 Jul 18 | |
| 42.73 | | | 42.73 | PB | Amalia Westerlund | U23 | -1 | | | Exeter | 29 May 18 | |
| 43.4 | | | 41.30i | | Ioana-Rebecca Andrei | U17 | -8 | Jake Awe | Luton | Ware | 6 May 18 | |
| 43.54 | | | 43.54 | PB | Noelle O'Regan | | 10 | | London Heathside | Finsbury Park | 31 May 18 | |