| 300 U15 Women 2019 to 47.0 | Head to Head Top 10 |
| Rank | Perf | | | PB | | Name | | Year | Coach | Club | Venue | Date | |
| 1 | 39.38 | | | 39.38 | PB | Nandy Kihuyu | | 2 | Veronica Boden | Hallamshire | Bedford | 1 Sep 19 |  |
| 2 | 39.63 | | | 39.63 | PB | Emilia Rock | | 2 | Nick Taylor | Vale of Aylesbury | Birmingham | 13 Jul 19 | |
| 3 | 39.65 | | | 39.65 | PB | Sophie Wallwork | | 2 | | Pitreavie | Grangemouth | 11 May 19 | |
| 4 | 39.85 | | | 38.81i | | Rebecca Grieve | | 2 | Francis Smith | Pitreavie | Bedford | 1 Sep 19 | |
| 5 | 39.87 | | | 39.87 | PB | Abbie Parker | | 2 | Deborah Keenleyside | Dacorum | Hemel Hempstead | 8 Jun 19 | |
| 6 | 40.25 | | | 40.25 | PB | Imogen Pughe | | 2 | | West Cheshire | Stretford | 27 May 19 | |
| 7 | 40.34 | | | 40.34 | PB | Lucy Poole | | 1 | Gary Tunstall | Chorley ATC | Birmingham | 13 Jul 19 | |
| 8 | 40.40 | | | 40.40 | PB | Lucy Fellows | | 2 | | St. Mary's Richmond | Exeter | 15 Jun 19 | |
| 9 | 40.75 | | -1.4 | 40.75 | PB | Ella Wintle | | 2 | | Pembrokeshire | Wrexham | 16 Jun 19 | |
| 10 | 40.76 | | | 39.19 | | Jessica Astill | | 2 | | Stevenage & North Herts | Hemel Hempstead | 8 Jun 19 | |
| 11 | 40.89 | | | 40.89 | PB | Ophelia Pye | | 2 | David Hemery | Marlborough Athletics | Birmingham | 13 Jul 19 | |
| 12 | 40.9 | | | 41.95/40.9 | PB | Uche Okpalauko | | 2 | Darren Priestley | Havering | Chelmsford | 6 Jul 19 | |
| 42.05 | | | | | | | | | | Chelmsford | 11 May 19 | |
| 13 | 40.93 | | | 40.93 | PB | Tamsin Fowlie | | 2 | Scott Hamilton | Elgin | Grangemouth | 18 Aug 19 | |
| 14 | 41.00 | | | 41.00 | PB | Lily Bailey | | 2 | Jonathan Jackson | Bristol & West | Exeter | 15 Jun 19 | |
 UK 10 TARGET: 41.00 |
| 15 | 41.03 | | | 41.03 | PB | Isabel White | | 2 | Lee Walker | Longwood | Birmingham | 13 Jul 19 | |
| 16 | 41.09 | | | 40.55 | | Angelique Abberley | | 1 | | Rotherham | Sheffield | 20 Jul 19 | |
| 17 | 41.1 | | | 40.23 | | Olivia Boachie | | 2 | | Havering | Chelmsford | 6 Jul 19 | |
| 41.24 | | | | | | | | | | Birmingham | 12 Jul 19 | |
| 18 | 41.21 | | | 41.21 | PB | Silver Nwabuzor | | 2 | | Glasgow Sch of Sport | Grangemouth | 10 Aug 19 | |
| 19 | 41.22 | | | 41.22 | PB | Holly Kirkwood | | 2 | John Wilson | Victoria Park City of Glasgow | Gothenburg, SWE | 30 Jun 19 | |
| 20 | 41.3 | | | 41.17 | | Amarisa Sibley | | 2 | Phillip Kissi | Blackheath & Bromley | Gillingham | 4 Aug 19 | |
| 41.57 | | | | | | | | | | Bromley | 3 Jun 19 | |
| 20 | 41.3 | | | 42.00/41.3 | PB | Ayomide Cole | | 2 | | Basingstoke & Mid Hants | Guildford | 11 Aug 19 | |
| 42.23 | | | | | | | | | | Basingstoke | 8 Sep 19 | |
| 22 | 41.33 | | | 40.43 | | Katie Evans | | 2 | Dean Exton | Dorchester | Exeter | 4 Aug 19 | |
| 23 | 41.34 | | | 41.34 | PB | Teniola Fajuke | | 2 | Alf Vickers | Victoria Park & Tower Hamlets | Mile End | 20 Jul 19 | |
| 24 | 41.43 | | | 41.43 | PB | Jenna Hilditch | | 1 | Moira Jordan | Victoria Park City of Glasgow | Bedford | 1 Sep 19 | |
| 25 | 41.45 | | | 41.45 | PB | Katie Sakaria | | 1 | Sue Goode | Guildford & Godalming | Kingston | 12 May 19 | |
| 26 | 41.5 | | | 41.5 | PB | Tiya Canning Lawrence | | 1 | Alan James | Woodford Green Essex Ladies | Portsmouth | 14 May 19 | |
| 26 | 41.5 | | | 41.57/41.5 | PB | Imogen Wilson | | 1 | Ken Spencer | Maidenhead | Eton | 14 Sep 19 | |
| 41.92 | | | | | | | | | | Reading | 8 Jun 19 | |
| 28 | 41.60 | | | 40.35 | | Favour Joseph | | 1 | Anita Richardson | Sale Harriers Manchester | Sportcity | 7 Sep 19 | |
| 29 | 41.6 | | | 41.62/41.6 | PB | Lara Battersby | | 2 | | West Cheshire | Bebington | 22 Jun 19 | |
| 41.62 | | | | | | | | | | Liverpool | 18 May 19 | |
| 30 | 41.62 | | | 41.62 | PB | Cameron Kelly-Gordon | | 2 | | Blackheath & Bromley | Bromley | 3 Jun 19 | |
| 31 | 41.66 | | | 41.14 | | Elsa Thompson | | 2 | Robert Hadfield | Kingston upon Hull | Liverpool | 18 Aug 19 | |
| 32 | 41.67 | | | 41.42 | | Lucy Wintle | | 1 | | Pembrokeshire | Cardiff | 14 Jul 19 | |
| 33 | 41.71 | | | 41.48 | | Fatoumatta Bojang | | 2 | Jonathan Moss | West Cheshire | Birmingham | 15 Jun 19 | |
| 34 | 41.72 | | | 41.72 | PB | Eleanor Rayner | | 2 | | Wakefield | York | 22 Sep 19 | |
| 35 | 41.76 | | | 41.76 | PB | Imogen Wilson | | 1 | | Chester-le-Street | Birmingham | 12 Jul 19 | |
| 36 | 41.79 | | | 41.79 | PB | Abigail Phillips | | 2 | Zac Kerin | Bournemouth | Exeter | 21 Jul 19 | |
| 37 | 41.8 | | | 41.8 | PB | Ella Greenway | | 2 | Joanna Evans | Cleethorpes | Cleckheaton | 23 Jun 19 | |
| 38 | 41.86 | | | 41.86 | PB | Alice Geoghegan | | 2 | | Morpeth | Middlesbrough | 12 May 19 | |
| 39 | 41.9 | | | 41.9 | PB | Ava Lloyd | | 2 | Trevor Painter | Wigan & District | Stretford | 22 Jun 19 | |
| 39 | 41.9 | | | 41.91/41.7 | | Sophie Forbes-Laird | | 2 | James Webster | Shaftesbury Barnet | Stevenage | 7 Jul 19 | |
| 42.69 | i | | | | | | | | | Lee Valley | 3 Feb 19 | |
| 42.72 | | | | | | | | | | Birmingham | 12 Jul 19 | |
| 41 | 41.93 | | | 41.93 | PB | Katie Johnson | | 2 | | Edinburgh AC | Grangemouth | 11 May 19 | |
| 42 | 42.0 | | | 42.89/42.0 | PB | Sophie Cowey | | 2 | | City of Salisbury | Winchester | 7 Jul 19 | |
| 42.89 | | | | | | | | | | Swindon | 8 Jun 19 | |
| 43 | 42.04 | | | 42.04 | PB | Sadie Blake | | 2 | Ann Hayter | City of Portsmouth | Portsmouth | 11 May 19 | |
| 44 | 42.10 | | | 42.10 | PB | Isabella Merritt | | 2 | Andy Townsend | Horwich | Stretford | 8 Jun 19 | |
| 45 | 42.1 | | | 42.1 | PB | Esther Wilding | | 2 | | Crewe & Nantwich | Warrington | 11 May 19 | |
| 45 | 42.1 | | | 42.12/42.1 | PB | Laura Anene | | 2 | | Hillingdon | Guildford | 11 Aug 19 | |
| 42.12 | | | | | | | | | | Bedford | 31 Aug 19 | |
| 47 | 42.12 | | | 42.12 | PB | Nieve Robinson | | 1 | Margaret Galvin | Leigh | Liverpool | 18 Aug 19 | |
| 48 | 42.14 | | | 42.14 | PB | Lois Creasey | | 2 | David Howells | Middlesbrough (Mandale) | Middlesbrough | 12 May 19 | |
| 49 | 42.18 | | | 42.18 | PB | Sian Popham | | 1 | Andrew Kennard | Walton | Cardiff | 14 Jul 19 | |
| 50 | 42.20 | | | 40.77 | | Monica Davidson | | 1 | Brian Darby | Coventry | Birmingham | 12 Jul 19 | |
| 51 | 42.2 | | | 42.26/42.2 | PB | Gabriella Thoburn | | 2 | Grant Brown | South London | Ashford | 20 Jun 19 | |
| 43.24 | | | | | | | | | | Wimbledon | 7 Apr 19 | |
| 51 | 42.2 | | | 39.53 | | Stephanie Okoro | | 1 | Susan Deane | Havering | Braintree | 7 Jul 19 | |
| 51 | 42.2 | | | 43.20/42.2 | PB | Charlotte Wormley | | 1 | Vince Golding | Crawley | Guildford | 20 Jul 19 | |
| 43.20 | | | | | | | | | | Crawley | 7 Apr 19 | |
| 54 | 42.22 | | | 41.94i | | Emma Fisher | | 1 | Andrew Kennard | Walton | Kingston | 12 May 19 | |
| 55 | 42.26 | | | 42.26 | PB | Maisy Heggie | | 1 | | Rotherham | Shefield | 25 May 19 | |
| 56 | 42.3 | | | 42.35i/42.3 | PB | Hermione Mason | | 2 | David Lowe | Sale Harriers Manchester | Preston | 20 Jul 19 | |
| 42.83 | | | | | | | | | | Sportcity | 7 Sep 19 | |
| 56 | 42.3 | | | 41.89 | | Liana Williams | | 2 | Lesley Pearson | Windsor Slough Eton & Hounslow | Eton | 14 Sep 19 | |
| 45.34 | i | | | | | | | | | Lee Valley | 2 Mar 19 | |
| 58 | 42.31 | | | 42.31 | PB | Evie Watkins | | 2 | Arwyn Davies | Cardiff | Aberdare | 4 Aug 19 | |
| 59 | 42.36 | i | | 39.71 | | Callia Downey | | 1 | Tamunonengiye-Ofori Ossai | BFT Track Academy | Lee Valley | 1 Dec 19 | |
| 60 | 42.38 | i | | 40.52 | | Michelvi Wamba | | 2 | Alf Vickers | Victoria Park & Tower Hamlets | Lee Valley | 6 Jan 19 | |
| 60 | 42.38 | | | 42.38 | PB | Olivia Brown | | 2 | Norman Poole | Sale Harriers Manchester | Stretford | 27 May 19 | |
| 62 | 42.4 | | | 42.71i/42.4 | PB | Eve Garry | | 2 | Alan Erickson | Perth Strathtay | Perth | 5 May 19 | |
| 42.71 | i | | | | | | | | | Emirates Arena | 27 Jan 19 | |
| 62 | 42.4 | | | 42.58/42.4 | PB | Princess Asemota | | 1 | | Medway & Maidstone | Erith | 18 May 19 | |
| 62 | 42.4 | | | 42.63/42.4 | PB | Arantxa Middleton | | 2 | Gordon Densley | Tamworth | Tamworth | 23 Jun 19 | |
| 42.63 | | | | | | | | | | Birmingham (U) | 3 Jul 19 | |
| 65 | 42.44 | | | 42.44 | PB | Isobel Geere | | 2 | | Stevenage & North Herts | Watford | 11 May 19 | |
| 66 | 42.46 | | | 41.08/40.8 | | Mali Heard | | 1 | Justin Jordan-Davis | City of Plymouth | Exeter | 4 Aug 19 | |
| 67 | 42.5 | | | 43.36/42.5 | PB | Faith Mpassy | | 1 | Jay Galley | Blackheath & Bromley | Reading | 23 Jun 19 | |
| 43.36 | | | | | | | | | | Bromley | 3 Jun 19 | |
| 67 | 42.5 | | | 43.17/42.5 | PB | Orla Edwards | | 1 | Richard Edwards | Crawley | Crawley | 25 Jul 19 | |
| 43.90 | | | | | | | | | | Crawley | 8 Jun 19 | |
| 69 | 42.52 | | | 42.52 | PB | Charlotte Morris | | 2 | Marcia Marriott | Oxford City | Horspath | 17 Jul 19 | |
| 70 | 42.55 | i | | 42.55i | PB | Evie Greig | | 2 | John Wilson | Victoria Park City of Glasgow | Emirates Arena | 12 Jan 19 | |
| 42.66 | | | | | | | | | | Crownpoint | 29 May 19 | |
| 71 | 42.57 | | | 41.78 | | Nneka Okoh | | 1 | Sarah Stark | Chelmsford | Chelmsford | 8 Jun 19 | |
| 72 | 42.6 | | | 42.30/41.9 | | Christina Kirkby | | 1 | Virginia Mitchell | Guildford & Godalming | Brighton | 23 Jun 19 | |
| 43.96 | | | | | | | | | | Kingston | 12 May 19 | |
| 73 | 42.63 | | | 41.64 | | Abigail Rickard | | 1 | Sharon Morris | Birchfield H | Birmingham | 15 Jun 19 | |
| 73 | 42.63 | | | 42.63 | PB | Shanice Ighalo | | 1 | Kevin Smith | Northampton | Birmingham | 15 Jun 19 | |
| 75 | 42.65 | i | | 42.26 | | Sophia Deans | | 2 | Sharon Morris | Birchfield H | Birmingham | 17 Feb 19 | |
| 42.70 | | | | | | | | | | Sportcity | 7 Sep 19 | |
| 45.0 | | | | | | | | | | Birmingham | 27 Apr 19 | |
| 75 | 42.65 | | | 42.55 | | Seren Rodgers | | 2 | Steve Shaw | Taunton | Braunton | 9 Jun 19 | |
| 77 | 42.67 | i | | 42.67i | PB | Erin Ramsay | | 2 | | Giffnock North | Emirates Arena | 27 Oct 19 | |
| 43.70 | | | | | | | | | | Kilmarnock | 14 Apr 19 | |
| 78 | 42.7 | | | 42.72/42.7 | PB | Chloe Jardine | | 2 | John Gates | Bexley | Erith | 18 May 19 | |
| 42.72 | | | | | | | | | | Woodford | 27 Apr 19 | |
| 78 | 42.7 | | | 44.22/42.7 | PB | Stella Whitlum | | 2 | Mike Dunphy | Dacorum | Hemel Hempstead | 2 Jun 19 | |
| 44.22 | | | | | | | | | | Grays | 15 Sep 19 | |
| 78 | 42.7 | | | 43.16/42.7 | PB | Evie Turner | | 1 | Graham Howell | Westbury | Yate | 11 Aug 19 | |
| 43.16 | | | | | | | | | | Yate | 4 Sep 19 | |
| 81 | 42.74 | | | 42.74/42.5 | PB | Raegan Sellers | | 2 | | Banbury | Horspath | 7 Sep 19 | |
| 82 | 42.76 | | | 40.65 | | Annalise Agyei-Kyem | | 1 | Andrew Kennard | Walton | Lee Valley | 12 May 19 | |
| 83 | 42.80 | | | 42.04 | | Julia Winogrodzka | | 2 | | Bolton | Stretford | 22 Apr 19 | |
| 84 | 42.8 | | | 43.67/42.8 | PB | Madelaine Gillis | | 2 | | Middlesbrough (Mandale) | Middlesbrough | 22 Jun 19 | |
| 43.67 | | | | | | | | | | Gateshead | 15 Jun 19 | |
| 84 | 42.8 | | | 42.94/42.8 | PB | Emily Dunkley | | 2 | Claire East | City of Portsmouth | Brighton | 23 Jun 19 | |
| 42.94 | | | | | | | | | | Portsmouth | 11 May 19 | |
| 86 | 42.84 | | | 42.84 | PB | Niamy Day | | 2 | | Stevenage & North Herts | Hemel Hempstead | 8 Jun 19 | |
| 87 | 42.85 | i | | 41.75 | | Zahara Malcolm | | 2 | John Stow | Woodford Green Essex Ladies | Lee Valley | 13 Jan 19 | |
| 43.0 | | | | | | | | | | Erith | 18 May 19 | |
| 43.12 | | | | | | | | | | Chelmsford | 11 May 19 | |
| 88 | 42.89 | | | 42.04 | | Millie Bayman | | 1 | | Salford H | Stretford | 8 Jun 19 | |
| 88 | 42.89 | | | 41.82 | | Jemima Robinson | | 2 | Anthony Lee | Cardiff | Cardiff | 6 Jul 19 | |
| 90 | 42.9 | | | 43.50/42.9 | PB | Leah Watts | | 2 | Richard Sidoli | Poole AC | Bournemouth | 22 Jun 19 | |
| 43.50 | | | | | | | | | | Horspath | 7 Sep 19 | |
| 91 | 42.92 | | | 42.92 | PB | Gabriella Berkeley-Agyepong | | 2 | | Croydon | Kingston | 12 May 19 | |
| 91 | 42.92 | | | 41.85 | | Neve Woodward | | 2 | | Rushcliffe | Bedford | 31 Aug 19 | |
| 93 | 42.93 | | | 42.93 | PB | Isabella Lehtinen | | 2 | | Crawley | Crawley | 7 Apr 19 | |
| 94 | 42.94 | | | 42.94 | PB | Kyla Joy Francis | | 2 | Sue Keen | Eastbourne | Crawley | 11 May 19 | |
| 94 | 42.94 | | | 42.19 | | Amy Greig | | 2 | Remy Bosman | St. Mary's Richmond | Lee Valley | 12 May 19 | |
| 96 | 42.96 | | | 42.96 | PB | Isabelle Burlington | | 1 | | Mansfield | Loughborough | 29 Jul 19 | |
| 97 | 42.97 | | | 42.97 | PB | Charlotte Wilkinson | | 2 | Joe Frost | | Loughborough | 29 Jul 19 | |
| 98 | 42.99 | | | 42.99 | PB | Eve Walley | | 2 | Nick Marley | Guernsey | Portsmouth | 11 May 19 | |
| UK 100 TARGET: 43.00 |
| 99 | 43.03 | | | 43.03/42.1 | PB | Olivia Mensah | | 2 | | Walton | Eton | 20 Jul 19 | |
| 100 | 43.04 | | | 43.04 | PB | Anise Macaulay Orr | | 2 | | Edinburgh AC | Livingston | 21 Aug 19 | |
| 101 | 43.07 | | | 43.07 | PB | Isabel Causer | | 2 | Steven Marshall | Hallamshire | Sheffield | 20 Jul 19 | |
| 102 | 43.08 | | | 43.08 | PB | Mia Belton | | 2 | | Morpeth | Cudworth | 1 Sep 19 | |
| 103 | 43.1 | | | 43.38/43.1 | PB | Elsa Smith | | 2 | | New Forest Junior | Bournemouth | 9 Jun 19 | |
| 43.41 | | | | | | | | | | Eton | 20 Jul 19 | |
| 103 | 43.1 | | | 43.77/43.1 | PB | Ebiso Whyte | | 2 | | Enfield & Haringey | Ware | 7 Jul 19 | |
| 43.77 | | | | | | | | | | Hendon | 11 Aug 19 | |
| 103 | 43.1 | | | 43.50/43.1 | PB | Marissa Maclean | | 2 | | Edinburgh AC | Grangemouth | 24 Aug 19 | |
| 43.50 | | | | | | | | | | Scotstoun | 23 Jun 19 | |
| 106 | 43.12 | | | 43.12 | PB | Faye Landless | | 1 | | Gosforth | Middlesbrough | 12 May 19 | |
| 107 | 43.14 | | | 43.14 | PB | Scarlet Gledden | | 2 | Steven Marshall | Hallamshire | Doncaster | 6 Jul 19 | |
| 108 | 43.15 | | | 43.15 | PB | Charlotte Maxwell | | 2 | Martin Norman | Walton | Kingston | 12 May 19 | |
| 108 | 43.15 | | | 43.15 | PB | Abigail Tucker | | 1 | | Bideford | Tavistock | 14 Jul 19 | |
| 110 | 43.16 | | | 42.68/42.6 | | Amani Valli-Carter | | 2 | Peter Crook | Preston | Liverpool | 18 May 19 | |
| 111 | 43.2 | | | 43.41i/43.2 | PB | Amelia Gittens | | 1 | Colin Gaynor | Herts Phoenix | Ware | 18 May 19 | |
| 43.41 | i | | | | | | | | | Lee Valley | 1 Dec 19 | |
| 111 | 43.2 | | | 43.33/43.2 | PB | Alex Spurway | | 2 | | Leamington Athletics Academy | Nuneaton | 8 Jun 19 | |
| 43.79 | | | | | | | | | | Birmingham | 15 Jun 19 | |
| 111 | 43.2 | | | 41.55 | | Callie Coates | | 2 | Les Grant | Doncaster | Middlesbrough | 22 Jun 19 | |
| 44.10 | | | | | | | | | | Doncaster | 6 Jul 19 | |
| 111 | 43.2 | | | 44.32/43.2 | PB | Katie Ridley | | 2 | Daniel Brooker | Brighton & Hove | Brighton | 28 Jun 19 | |
| 44.82 | | | | | | | | | | Ashford | 17 Aug 19 | |
| 115 | 43.24 | | | 41.68 | | Nicole McGovern | | 1 | Idris Hamud | Hillingdon | Hendon | 27 Jul 19 | |
| 116 | 43.25 | | | 42.55 | | Manon Baines | | 2 | Conrad Kalinowski | St. Mary's Richmond | Basingstoke | 17 Jul 19 | |
| 117 | 43.28 | | | 41.96 | | Sade Fajuke | | 2 | | Victoria Park & Tower Hamlets | Woodford | 27 Apr 19 | |
| 117 | 43.28 | | | 43.28 | PB | Evie Smith | | 2 | | Leicestershire Schs | Birmingham | 1 Jul 19 | |
| 119 | 43.3 | | | 43.08i | | Keira Brady-Jones | | 2 | Sarah Kearney | Wirral | Preston | 20 Jul 19 | |
| 44.19 | | | | | | | | | | Stretford | 6 May 19 | |
| 119 | 43.3 | | | 41.47 | | Ines Green | | 1 | | Ipswich | Bury St Edmunds | 8 Sep 19 | |
| 43.54 | | | | | | | | | | Bedford | 15 Sep 19 | |
| 121 | 43.35 | | | 41.10 | | Ruby Brook | | 2 | Mark Wanklyn | Stroud | Yate | 20 Jul 19 | |
| 122 | 43.37 | | | 43.25 | | Ruby Green | | 2 | | Bedford & County | Bedford | 11 May 19 | |
| 122 | 43.37 | | | 43.37 | PB | Freya Clarkson | | 1 | David Lowes | Chester-le-Street | Middlesbrough | 12 May 19 | |
| 124 | 43.38 | | | 43.38 | PB | Zara Evans | | 2 | | Carmarthen | Aberdare | 4 Aug 19 | |
| 125 | 43.4 | | | 41.50/41.4 | | Alice Bennett | | 1 | Shane Smith | Kettering | Corby | 12 May 19 | |
| 43.70 | | | | | | | | | | Kettering | 2 Jun 19 | |
| 125 | 43.4 | | | 44.01/43.4 | PB | Ellen Bruce | | 1 | Marcia Marriott | Oxford City | Horspath | 9 Jun 19 | |
| 44.01 | | | | | | | | | | Horspath | 11 May 19 | |
| 125 | 43.4 | | | 45.03/43.4 | PB | Emmeline Viala | | 2 | | Harrow | Sandy | 22 Jun 19 | |
| 128 | 43.41 | i | | 39.94 | | Chelsea Fagan | | 2 | | Notts | Sheffield | 24 Nov 19 | |
| 129 | 43.43 | | | 43.43 | PB | Kitty Mair | | 2 | Ken Spencer | Bracknell AC | Reading | 8 Jun 19 | |
| 129 | 43.43 | | | 43.43 | PB | Jersey Jones | | 2 | Jason Michael Quirke | Cardiff | Cardiff | 14 Jul 19 | |
| 131 | 43.44 | | | 42.95 | | Niamh Fenlon | | 1 | Jonathan McWhinney | North Down | Bangor | 9 Apr 19 | |
| 132 | 43.45 | | | 43.45 | PB | Emily Rankin | | 1 | Gary Tunstall | Preston | Stretford | 22 Apr 19 | |
| 133 | 43.46 | i | | 43.46i | PB | Tilly Wilson-Machin | | 2 | David Hood | Nithsdale | Emirates Arena | 3 Feb 19 | |
| 44.18 | | | | | | | | | | Kilmarnock | 19 May 19 | |
| 133 | 43.46 | | | 43.11 | | Abbie Harrison | | 2 | | Inverness | Aberdeen | 23 Jun 19 | |
| 135 | 43.48 | i | | 43.25i | | Alexandra Cathie | | 2 | Thomas Graham | Whitemoss | Emirates Arena | 3 Feb 19 | |
| 43.71 | | | | | | | | | | Scotstoun | 23 Jun 19 | |
| 136 | 43.5 | | | 42.35 | | Eva Tyler | | 1 | | Hereford | Stourport | 7 Apr 19 | |
| 136 | 43.5 | | | 42.2 | | Emily Cann | | 2 | | West Suffolk | Ipswich | 2 May 19 | |
| 136 | 43.5 | | | 43.86/43.5 | PB | Isobel Alexander | | 2 | | Ipswich | Ipswich | 12 May 19 | |
| 43.86 | | | | | | | | | | Horspath | 7 Sep 19 | |
| 136 | 43.5 | | | 44.48/43.5 | PB | Lucy Nattrass | | 1 | Darren Priestley | Havering | Reading | 23 Jun 19 | |
| 44.48 | | | | | | | | | | Chelmsford | 11 May 19 | |
| 136 | 43.5 | | | 43.29 | | Olivia East | | 2 | Claire East | City of Portsmouth | Swindon | 30 Jun 19 | |
| 136 | 43.5 | | | 43.71/43.5 | PB | Charlotte Williams | | 2 | Peter Covey | Epsom & Ewell | Guildford | 7 Jul 19 | |
| 43.71 | | | | | | | | | | Kingston | 12 May 19 | |
| 136 | 43.5 | | | 43.5 | PB | Flo Sumpter | | 2 | | St. Mary's Richmond | Wormwood Scrubs | 20 Jul 19 | |
| 136 | 43.5 | | | 45.32i/43.5 | PB | Samantha Dagg | | 2 | Bruce Scott | Tweed, Leader, Jed Track | Grangemouth | 24 Aug 19 | |
| 144 | 43.51 | | | 43.51 | PB | Cody Hall | | 2 | Darren Hirst | Durham | Middlesbrough | 12 May 19 | |
| 144 | 43.51 | | | 43.51 | PB | Beth Davidse | | 2 | John Dill | Swindon | Swindon | 8 Jun 19 | |
| 144 | 43.51 | | | 42.77i | | Jemma Thomson | | 1 | Peter Griffiths | Chiltern | Wycombe | 16 Jun 19 | |
| 144 | 43.51 | | | 43.51 | PB | Cara Davie | | 2 | Tom Leeson | Banchory Stonehaven | Aberdeen | 23 Jun 19 | |
| 148 | 43.53 | | | 43.53 | PB | Sophie Marshall | | 2 | Stephen Richardson | Retford | York | 22 Sep 19 | |
| 149 | 43.54 | i | | 43.54i | PB | Vanessa Granada | | 1 | | Team Hounslow | Lee Valley | 17 Mar 19 | |
| 150 | 43.55 | | | 43.55/42.8 | PB | Catriona Scott | | 2 | Moira Jordan | Victoria Park City of Glasgow | Gothenburg, SWE | 30 Jun 19 | |
| 151 | 43.58 | | | 43.58 | PB | Chloe Simmonite | | 1 | | Swansea | Yate | 20 Jul 19 | |
| 152 | 43.60 | | | 43.60 | PB | Anna Brooks | | 1 | Paul Hill | Cardiff Archers | Cardiff | 6 Jul 19 | |
| 153 | 43.6 | | | 43.74/43.6 | PB | Mia Bailey | | 2 | Keith Yellop | City of Norwich | Norwich | 11 May 19 | |
| 43.74 | | | | | | | | | | Grays | 15 Sep 19 | |
| 153 | 43.6 | | | 43.95/43.6 | PB | Lottie Bentley | | 2 | Mike Bennett | Worcester | Kettering | 2 Jun 19 | |
| 43.95 | | | | | | | | | | Birmingham | 15 Jun 19 | |
| 153 | 43.6 | | | 43.48 | | Freya Bruno | | 1 | Keith Morant | Burton | Wolverhampton | 23 Jun 19 | |
| 43.77 | | | | | | | | | | Loughborough | 24 Aug 19 | |
| 153 | 43.6 | | | 43.6 | PB | Sadie Frater-White | | 2 | Simon Mennell | Braintree | St. Albans | 11 Aug 19 | |
| 157 | 43.61 | | | 43.61/43.4 | PB | Leah Jay | | 2 | | Luton | Bedford | 11 May 19 | |
| 158 | 43.67 | | | 43.67/43.4 | PB | Katelyn Howden | | 2 | | Cleethorpes | Grimsby | 27 May 19 | |
| 159 | 43.70 | | | 40.85 | | Isabelle Asante | | 1 | Darren Lewis | Tipton | Nuneaton | 11 Aug 19 | |
| 160 | 43.7 | | | 43.7 | PB | Iris Downes | | 2 | Colin Lancaster | Shrewsbury | Telford | 11 May 19 | |
| 160 | 43.7 | | | 43.07 | | Isobel Orencas | | 2 | | Wreake & Soar Valley | Kettering | 2 Jun 19 | |
| 43.92 | | | | | | | | | | Loughborough | 20 May 19 | |
| 160 | 43.7 | | | 43.58 | | Hannah Moody | | 2 | | Chesterfield | Middlesbrough | 22 Jun 19 | |
| 44.02 | | | | | | | | | | Derby | 25 May 19 | |
| 160 | 43.7 | | | 41.75 | | Amber Bailey | | 2 | Les Rayment | Bracknell AC | Brighton | 23 Jun 19 | |
| 160 | 43.7 | | | 42.81/42.2 | | Jasmine Pattison | | 1 | Adrian Weston | Aldershot, Farnham & District | Winchester | 23 Jun 19 | |
| 45.55 | | | | | | | | | | Eton | 7 Apr 19 | |
| 160 | 43.7 | | | 45.16/43.7 | PB | Chloe Brand | | 2 | | Thurrock | Chelmsford | 6 Jul 19 | |
| 45.16 | | | | | | | | | | Woodford | 30 Mar 19 | |
| 166 | 43.72 | | | 43.72 | PB | Isabella Wigley | | 2 | Phillip Warwicker | Cardiff Archers | Cardiff | 19 Jun 19 | |
| 167 | 43.73 | | | 43.73 | PB | Ruby Saunders | | 2 | | Westbury | Yate | 23 Jun 19 | |
| 168 | 43.75 | i | | 42.70 | | Stephanie Jones | | 2 | Daniel Gilroy | West Cheshire | Sheffield | 23 Feb 19 | |
| 168 | 43.75 | | | 41.81i | | Hazel Will | | 1 | | Dundee Hawkhill | Aberdeen | 23 Jun 19 | |
| 170 | 43.76 | | | 43.76 | PB | Ella McGregor | | 2 | | Giffnock North | Gothenburg, SWE | 30 Jun 19 | |
| 171 | 43.77 | | | 43.77 | PB | Francesca Morgan | | 1 | Connor Lane | Cardiff | Cardiff | 14 Jul 19 | |
| 172 | 43.8 | | | 41.44 | | Therese Tolan | | 2 | Charlene Thomas | Harrogate | Gateshead | 18 May 19 | |
| 44.02 | | | | | | | | | | Cudworth | 11 May 19 | |
| 172 | 43.8 | | | 44.58i/43.8 | PB | Ruby Styler | | 1 | Steven Marshall | Hallamshire | Gateshead | 18 May 19 | |
| 44.58 | i | | | | | | | | | Sheffield | 17 Mar 19 | |
| 172 | 43.8 | | | 43.82/43.8 | PB | Nia Amaning | | 2 | Carl Graham | Newham & Essex Beagles | Lewes | 18 May 19 | |
| 43.82 | | | | | | | | | | Stratford | 11 Aug 19 | |
| 172 | 43.8 | | | 44.62/43.8 | PB | Saffron Tasker | | 2 | | Peterborough | Peterborough | 26 May 19 | |
| 44.62 | | | | | | | | | | Horspath | 7 Sep 19 | |
| 172 | 43.8 | | | 44.37/43.8 | PB | Poppy Edwards | | 2 | | Radley | Horspath | 9 Jun 19 | |
| 44.37 | | | | | | | | | | Horspath | 17 Jul 19 | |
| 172 | 43.8 | | | 44.80/43.8 | PB | Poppy Elton | | 2 | Geoff Aston | Worcester | Gloucester | 23 Jun 19 | |
| 44.80 | | | | | | | | | | Stourport | 7 Jul 19 | |
| 172 | 43.8 | | | 44.04/43.8 | PB | Sadie Harris | | 2 | Mick Woods | Aldershot, Farnham & District | Winchester | 23 Jun 19 | |
| 44.04 | | | | | | | | | | Portsmouth | 11 May 19 | |
| 172 | 43.8 | | | 44.15/42.9 | | Christabel Afriyie Amponsah | | 2 | | Croydon | Bromley | 20 Jul 19 | |
| 44.15 | | | | | | | | | | Hornchurch | 18 May 19 | |
| 172 | 43.8 | | | 45.34/43.8 | PB | Grace Daniels | | 2 | Simon Eisenmann | City of Norwich | Braintree | 21 Jul 19 | |
| 45.34 | | | | | | | | | | Grays | 15 Sep 19 | |
| 181 | 43.81 | | | 43.26 | | Cariad Norris | | 2 | | Guildford & Godalming | Kingston | 12 May 19 | |
| 182 | 43.82 | | | 43.82 | PB | Holly Waugh | | 2 | Lee Cleary-Morgan | North Shields Poly | Hexham | 18 May 19 | |
| 183 | 43.85 | | | 43.85 | PB | Orla Foley | | 2 | | St. Albans AC | Hemel Hempstead | 8 Jun 19 | |
| 184 | 43.87 | | | 43.87 | PB | Freya Higginbottom | | 2 | Susan Deane | Havering | Hornchurch | 18 May 19 | |
| 184 | 43.87 | | | 42.60 | | Oliwia Cwienczek | | 1 | | Yeovil | Exeter | 4 Aug 19 | |
| 184 | 43.87 | | | 43.87/43.0 | PB | Imogen Blackwell | | 2 | Peter Crook | Preston | Sportcity | 7 Sep 19 | |
| 187 | 43.89 | | | 43.89 | PB | Eve Denman | | 2 | | Cardiff Archers | Yate | 20 Jul 19 | |
| 188 | 43.90 | | | 43.90/43.7 | PB | Niamh Bould | | 1 | | City of Stoke | Stretford | 22 Apr 19 | |
| 188 | 43.90 | | | 42.35 | | Kate Bain | | 2 | Alun Williams | Guernsey | St. Peter Port | 16 May 19 | |
| 190 | 43.9 | | | 43.15 | | Mia Oldfield | | 2 | David Wilkinson | Thames Valley | Sandy | 22 Jun 19 | |
| 190 | 43.9 | | | 42.81i | | Emma Ibbotson | | 2 | Charlene Thomas | Harrogate | Preston | 20 Jul 19 | |
| 44.74 | | | | | | | | | | York | 8 Jun 19 | |
| 192 | 43.91 | | | 42.76 | | Josephine Bassett | | 1 | | Medway Phoenix | Tonbridge | 26 Aug 19 | |
| 193 | 43.95 | | | 43.95 | PB | Jane Sesay | | 2 | | S Factor | Bromley | 3 Jun 19 | |
| 194 | 43.96 | | | 43.96 | PB | Victorious Ezeh | | 1 | | Marshall Milton Keynes | Milton Keynes | 23 Jun 19 | |
| 195 | 43.97 | | | 43.97 | PB | Imogen Wiggin | | 2 | | Team Kennet | Reading | 8 Jun 19 | |
| 196 | 44.0 | | | 43.90i | | Non Elen Redvers Jones | | 2 | Stephen Livett | Menai | Bury | 18 May 19 | |
| 44.17 | | | | | | | | | | Cardiff | 14 Jul 19 | |
| 196 | 44.0 | | | 43.66/42.9 | | Madeleine Tatham | | 2 | Joe McColgan | Amber Valley & Erewash | Nottingham | 18 May 19 | |
| 46.24 | | | | | | | | | | Nottingham | 31 Mar 19 | |
| 196 | 44.0 | | | 42.97 | | Poppy Fox-Rowe | | 1 | | Stratford-upon-Avon | Banbury | 16 Jun 19 | |
| 196 | 44.0 | | | 45.11/44.0 | PB | Charlotte Mahoney | | 1 | | Preston | Bebington | 22 Jun 19 | |
| 45.11 | | | | | | | | | | Sportcity | 7 Sep 19 | |
| 200 | 44.02 | | | 44.02 | PB | Abbey Bate | | 1 | Harry Richardson | Crewe & Nantwich | Birmingham | 15 Jun 19 | |
| 200 | 44.02 | i | | 39.38 | | Arabella Wilson | | 1 | Andrew Fisher | Guildford & Godalming | Lee Valley | 1 Dec 19 | |
| 202 | 44.03 | | | 44.03 | PB | Anisa Hamilton | | 2 | Catherine Muth | Birchfield H | Birmingham | 15 Jun 19 | |
| 202 | 44.03 | | | 44.03 | PB | Lauren Owen | | 1 | | Wrexham | Cardiff | 6 Jul 19 | |
| 204 | 44.05 | i | | 40.54 | | Mia Walker | | 1 | Andrew Fraser | Wirral | Sportcity | 15 Dec 19 | |
| 205 | 44.07 | | | 44.07 | PB | Maya Vandermark | | 2 | Bryn Percival | Cambridge & Coleridge | Cambridge | 11 May 19 | |
| 205 | 44.07 | | | 43.15 | | Lottie McLaren | | 1 | Colin Pleass | Tamworth | Birmingham | 15 Jun 19 | |
| 205 | 44.07 | | | 44.07 | PB | Emily Knox | | 2 | | Coventry | Horspath | 17 Jul 19 | |
| 208 | 44.10 | | | 44.10 | PB | Niamh Atkinson | | 2 | | Pontefract | York | 25 May 19 | |
| 208 | 44.10 | | | 44.10 | PB | Alicia Chinda | | 2 | Frank Adams | Enfield & Haringey | Parliament Hill | 23 Jun 19 | |
| 210 | 44.1 | | | 44.60/44.1 | PB | Sophie Nugent | | 2 | | Basildon | Erith | 18 May 19 | |
| 44.60 | | | | | | | | | | Gillingham | 22 Jun 19 | |
| 210 | 44.1 | | | 44.11/44.1 | PB | Evie Beck | | 2 | | Winchester | Winchester | 18 May 19 | |
| 44.11 | | | | | | | | | | Portsmouth | 11 May 19 | |
| 210 | 44.1 | | | 44.23/43.8 | | Emma Shedden | | 1 | | Winchester | Winchester | 18 May 19 | |
| 44.23 | | | | | | | | | | Portsmouth | 11 May 19 | |
| 210 | 44.1 | | | 44.22/44.1 | PB | Carmen Brooks | | 2 | | City of York | York | 18 May 19 | |
| 44.22 | | | | | | | | | | York | 22 Sep 19 | |
| 210 | 44.1 | | | 44.16/44.1 | PB | Alexa Forster | | 2 | David Rice | Hertford & Ware | Hemel Hempstead | 8 Jun 19 | |
| 44.16 | | | | | | | | | | Watford | 11 May 19 | |
| 210 | 44.1 | | | 44.78/44.1 | PB | Holly Brewster | | 2 | Jamie Russell | Longwood | Cleckheaton | 23 Jun 19 | |
| 44.78 | | | | | | | | | | Cudworth | 1 Sep 19 | |
| 210 | 44.1 | | | 44.61/44.1 | PB | Chloe Waterhouse | | 2 | Carl Graham | Newham & Essex Beagles | Lewes | 20 Jul 19 | |
| 44.61 | | | | | | | | | | Chelmsford | 8 Jun 19 | |
| 210 | 44.1 | | | 44.60/44.1 | PB | Isabella Richards | | 1 | | Vale of Aylesbury | Wormwood Scrubs | 20 Jul 19 | |
| 218 | 44.11 | i | | 44.11i | PB | Jacey Shillito | | 2 | Veronica Boden | Wombwell | Sheffield | 17 Mar 19 | |
| 44.47 | | | | | | | | | | Cudworth | 11 May 19 | |
| 218 | 44.11 | | | 44.11/43.9 | PB | Michelle Yalekhue | | 2 | | Notts | Birmingham | 15 Jun 19 | |
| 220 | 44.12 | | | 44.12 | PB | Gwenyver Kuipers | | 1 | | Maldwyn | Brecon | 10 Jul 19 | |
| 221 | 44.15 | i | | 41.23 | | MIllie Webb | | 2 | | Cardiff | Cardiff | 1 Dec 19 | |
| 44.39 | | | | | | | | | | Aberdare | 29 Jun 19 | |
| 222 | 44.16 | | | 44.16 | PB | Annie Burchell | | 2 | Deborah Keenleyside | Dacorum | Hemel Hempstead | 8 Jun 19 | |
| 222 | 44.16 | i | | 40.98i | | Shayna Asamoah | | 1 | Agustin Paniagua Osorio | Dunfermline Track & Field | Emirates Arena | 27 Oct 19 | |
| 224 | 44.17 | | | 44.17 | PB | Parris French | | 2 | Phillip Kissi | Blackheath & Bromley | Tooting Bec | 29 Jun 19 | |
| 225 | 44.19 | | | 44.19 | PB | Annabella Curcher | | 2 | | Tonbridge | Hornchurch | 18 May 19 | |
| 225 | 44.19 | | | 44.19 | PB | Jessamine Hughes | | 2 | Keeley Sutton | Notts | Loughborough | 20 May 19 | |
| 227 | 44.20 | | | 43.34/43.3 | | Annabelle Hess | | 2 | Tammie Ryder | Tavistock | Exeter | 25 Jun 19 | |
| 228 | 44.2 | | | 44.25/43.0 | | Lauren Williams | | 2 | | West Cheshire | Warrington | 11 May 19 | |
| 45.88 | | | | | | | | | | Liverpool | 18 Aug 19 | |
| 228 | 44.2 | | | 44.2 | PB | Madeleine Mayes | | 2 | Bill Boyd | Corby | Corby | 21 May 19 | |
| 228 | 44.2 | | | 45.96/44.2 | PB | Kelise Happi | | 1 | | Barry & Vale | Carmarthen | 25 May 19 | |
| 45.96 | | | | | | | | | | Swansea | 24 Aug 19 | |
| 228 | 44.2 | | | 45.62/44.2 | PB | Heleanor MacDonald | | 2 | | Halifax | Cleckheaton | 23 Jun 19 | |
| 45.62 | | | | | | | | | | Cudworth | 1 Sep 19 | |
| 228 | 44.2 | | | 45.43/44.2 | PB | Mollie Barrett | | 1 | | Brighton & Hove | Lewes | 8 Jul 19 | |
| 45.43 | | | | | | | | | | Bracknell | 18 May 19 | |
| 228 | 44.2 | | | 42.43 | | Olivia Sparks | | 1 | | Thames Valley | Wormwood Scrubs | 20 Jul 19 | |
| 45.42 | | | | | | | | | | Lee Valley | 6 Apr 19 | |
| 228 | 44.2 | | | 44.2 | PB | Chichi Cooper | | 2 | Kenyouth (Kenny) Walters | Cambridge H | Gillingham | 4 Aug 19 | |
| 235 | 44.21 | i | | 44.21i/42.3 | PB | Sophie Evans | | 2 | Thomas McTaggart | Larkhall | Emirates Arena | 12 Jan 19 | |
| 236 | 44.27 | | | 44.27 | PB | Ava Sparham | | 2 | | Basildon | Chelmsford | 11 May 19 | |
| 237 | 44.28 | | | 44.28 | PB | Alyssa Gale | | 2 | | Torbay | Exeter | 8 Jun 19 | |
| 238 | 44.29 | | | 41.99 | | Maya Stewart | | 2 | Deirdre Elmhirst | Worcester | Swindon | 18 May 19 | |
| 239 | 44.3 | | | 43.11 | | Lexie Bull | | 2 | Christopher Brown | Stroud | Stourport | 7 Apr 19 | |
| 239 | 44.3 | | | 44.3 | PB | Jessica Duncton | | 1 | Mark Wanklyn | Cheltenham | Swansea | 27 Apr 19 | |
| 239 | 44.3 | | | 44.3 | PB | Emilia Rawstorne | | 2 | | St. Mary's Richmond | Aberdare | 18 May 19 | |
| 239 | 44.3 | | | 42.53 | | Olivia Harper | | 1 | | Gateshead | Gateshead | 18 May 19 | |
| 45.24 | | | | | | | | | | Gateshead | 26 Aug 19 | |
| 239 | 44.3 | | | 44.3 | PB | Sarah Gahan | | 2 | | Solihull & Small Heath | Nottingham | 18 May 19 | |
| 239 | 44.3 | | | 44.63/44.3 | PB | Lily Amor | | 2 | | Yeovil | Bournemouth | 8 Jun 19 | |
| 44.63 | | | | | | | | | | Exeter | 15 Jun 19 | |
| 239 | 44.3 | | | 46.51i/44.3 | PB | Nynka Rucker | | 2 | | Team Bath | Gloucester | 9 Jun 19 | |
| 239 | 44.3 | | | 44.3 | PB | Cynthia Asiegbu | | 1 | Darren Priestley | Havering | Chelmsford | 6 Jul 19 | |
| 247 | 44.33 | | | 44.33 | PB | Beth Hamilton | | 1 | Richard Massey | Mansfield | Derby | 18 May 19 | |
| 248 | 44.36 | | | 44.36 | PB | Lauren Wormley | | 1 | Vince Golding | Crawley | Crawley | 7 Apr 19 | |
| 248 | 44.36 | | | 44.36 | PB | Grace French | | 2 | | Basingstoke & Mid Hants | Portsmouth | 11 May 19 | |
| 250 | 44.39 | | | 43.98 | | Kelly-Marie Marsh | | 2 | John Dill | Swindon | Swindon | 12 May 19 | |
| 250 | 44.39 | | | 44.39 | PB | Abigail Iredale | | 2 | | Copeland | Gateshead | 15 Jun 19 | |
| 252 | 44.40 | | | 42.66/42.2 | | Leoni Pye | | 1 | | Middlesbrough (Mandale) | Gateshead | 15 Jun 19 | |
| 253 | 44.4 | | | 44.31/44.1 | | Emily Rawson | | 1 | Keeley Sutton | Notts | Nottingham | 18 May 19 | |
| 44.57 | | | | | | | | | | Milton Keynes | 23 Jun 19 | |
| 253 | 44.4 | | | 43.08 | | Isla Brown | | 2 | Alan Hewson | Windsor Slough Eton & Hounslow | Poole | 18 May 19 | |
| 44.70 | | | | | | | | | | Horspath | 11 May 19 | |
| 253 | 44.4 | | | 46.64/44.4 | PB | Mia Rowan | | 1 | | Harlow AC | Ware | 2 Jun 19 | |
| 46.64 | | | | | | | | | | Stevenage | 6 May 19 | |
| 253 | 44.4 | | | 44.42/44.4 | PB | Emma Cresswell | | 2 | Mike Dunphy | Dacorum | Hemel Hempstead | 8 Jun 19 | |
| 44.42 | | | | | | | | | | Hemel Hempstead | 8 Jun 19 | |
| 253 | 44.4 | | | 45.74i/44.4 | PB | Olivia Paddon | | 2 | Leigh Paddon | Sheffield & Dearne | Middlesbrough | 22 Jun 19 | |
| 253 | 44.4 | | | 44.4 | PB | Robyn Stannard | | 2 | | Guildford & Godalming | Brighton | 23 Jun 19 | |
| 253 | 44.4 | | | 45.10i/44.4 | PB | Grace Gibson | | 2 | | Bury | Macclesfield | 20 Jul 19 | |
| 45.45 | | | | | | | | | | Stretford | 8 Jun 19 | |
| 253 | 44.4 | | | 45.42/44.4 | PB | Angel Acheampong | | 2 | | Thames Valley | Wormwood Scrubs | 20 Jul 19 | |
| 45.42 | | | | | | | | | | Lee Valley | 12 May 19 | |
| 253 | 44.4 | | | 43.94/43.7 | | Delleah Belgrave | | 2 | Tony Jackson | Swindon | Worcester | 8 Aug 19 | |
| 44.71 | | | | | | | | | | Swindon | 24 Mar 19 | |
| 253 | 44.4 | | | 44.4 | PB | Erin Little | | 1 | | Chelmsford | St. Albans | 11 Aug 19 | |
| 253 | 44.4 | | | 44.18 | | Jena Dickinson | | 2 | Ian Halliday | Bury | Warrington | 11 Aug 19 | |
| 264 | 44.41 | | | 43.48 | | Stroma Fraser | | 1 | Charles Bannerman | Inverness | Inverness | 11 May 19 | |
| 264 | 44.41 | | | 42.11 | | Estelle Roots | | 2 | Stephen Cottle | Torbay | Exeter | 2 Jun 19 | |
| 266 | 44.46 | | | 44.40i/43.5 | | Hannah Hope | | 2 | | Liverpool H | Sheffield | 20 Jul 19 | |
| 267 | 44.47 | | | 44.47 | PB | Katie Keiller | | 2 | | Guildford & Godalming | Bracknell | 18 May 19 | |
| 268 | 44.48 | | | 44.48/44.4 | PB | Sienna Richardson | | 2 | Dave Ragan | Basingstoke & Mid Hants | Basingstoke | 17 Jul 19 | |
| 269 | 44.50 | | | 44.50 | PB | Vienna Blair | | 2 | | Birchfield H | Yate | 20 Jul 19 | |
| 270 | 44.5 | | | 46.91/44.5 | PB | Anna Guld | | 2 | | Hillingdon | Hillingdon | 18 May 19 | |
| 270 | 44.5 | | | 42.0 | | Keira Gray | | 2 | | Manx | Douglas | 25 May 19 | |
| 270 | 44.5 | | | 45.57i/44.5 | PB | Niamh Smith | | 1 | | Hertford & Ware | Peterborough | 26 May 19 | |
| 45.81 | i | | | | | | | | | Lee Valley | 17 Mar 19 | |
| 46.10 | | | | | | | | | | Watford | 11 May 19 | |
| 270 | 44.5 | | | 45.12/44.5 | PB | Jessica Duggan | | 1 | Matthew Kiernan | Croydon | Walton | 1 Jun 19 | |
| 45.12 | | | | | | | | | | Kingston | 12 May 19 | |
| 270 | 44.5 | | | 43.66 | | Maisie Brown | | 1 | Mark Goldie | Halifax | Wakefield | 20 Jun 19 | |
| 45.33 | | | | | | | | | | Leeds (B) | 8 Jun 19 | |
| 270 | 44.5 | | | 46.18/44.5 | PB | Ella Turner | | 2 | | Sedbergh | Chelmsford | 6 Jul 19 | |
| 46.18 | | | | | | | | | | Gateshead | 15 Jun 19 | |
| 270 | 44.5 | | | 44.5 | PB | Jemima Bowen | | 2 | | Guildford & Godalming | Guildford | 7 Jul 19 | |
| 270 | 44.5 | | | 44.5 | PB | Lyla Endean | | 2 | | West Suffolk | Bury St Edmunds | 8 Sep 19 | |
| 278 | 44.53 | | | 43.38 | | Kezia Beeton | | 1 | John Stow | Woodford Green Essex Ladies | Gillingham | 22 Jun 19 | |
| 279 | 44.54 | | | 44.54 | PB | Abi McKinstry | | 2 | | Stewartry | Kilmarnock | 19 May 19 | |
| 280 | 44.58 | | | 40.89 | | Molly Firth | | 1 | | Halifax | York | 25 May 19 | |
| 281 | 44.59 | | | 44.59 | PB | Olivia Bell | | 1 | | Darlington H | Middlesbrough | 12 May 19 | |
| 281 | 44.59 | | | 44.59 | PB | Emily Churchill | | 2 | | Exeter | Exeter | 8 Jun 19 | |
| 283 | 44.6 | | | 45.14/44.6 | PB | Lucy Presley | | 1 | David McManus | New Forest Junior | Winchester | 7 Apr 19 | |
| 45.14 | | | | | | | | | | Portsmouth | 11 May 19 | |
| 283 | 44.6 | | | 44.13i | | Madison Kelly | | 1 | Peter Gore | City of Norwich | Norwich | 11 May 19 | |
| 283 | 44.6 | | | 47.03i/44.6 | PB | Amber Hughes | | 1 | Barrie Hughes | Southport Waterloo | Litherland | 18 May 19 | |
| 283 | 44.6 | | | 45.17/44.6 | PB | Kate Williams | | 1 | | Darlington H | Middlesbrough | 19 May 19 | |
| 45.17 | | | | | | | | | | Middlesbrough | 11 Jun 19 | |
| 283 | 44.6 | | | 42.28 | | Louise Grenfell | | 1 | | Herts Phoenix | Ware | 2 Jun 19 | |
| 283 | 44.6 | | | 45.15/44.6 | PB | Poppy Hankinson | | 2 | | Reading AC | Basingstoke | 5 Jun 19 | |
| 45.15 | | | | | | | | | | Reading | 8 Jun 19 | |
| 283 | 44.6 | | | 44.6 | PB | Leah Butterfill | | 2 | | Wreake & Soar Valley | Derby | 17 Jun 19 | |
| 283 | 44.6 | | | 42.40 | | Lucy Rebori | | 1 | Stuart Kerr | Rotherham | Rotherham | 22 Jun 19 | |
| 46.94 | | | | | | | | | | Hull | 27 Apr 19 | |
| 283 | 44.6 | | | 44.6 | PB | Sebastienna Bairstow | | 2 | Scott Bairstow | Keighley & Craven | Cleckheaton | 23 Jun 19 | |
| 283 | 44.6 | | | 44.62/44.6 | PB | Bella Digby | | 2 | Claire East | City of Portsmouth | Swindon | 30 Jun 19 | |
| 44.62 | | | | | | | | | | Portsmouth | 11 May 19 | |
| 283 | 44.6 | | | 46.05/44.6 | PB | Annabel Todd | | 1 | Nicholas Bull | Team Kennet | Swindon | 30 Jun 19 | |
| 283 | 44.6 | | | 47.92i/44.6 | PB | Joanne Upton Fletcher | | 2 | | Blackpool, Wyre & Fylde | Macclesfield | 20 Jul 19 | |
| 295 | 44.64 | | | 44.64/44.0 | PB | Lilly Jones | | 2 | Rachel Jones | New Forest Junior | Swindon | 2 Jun 19 | |
| 296 | 44.65 | | | 44.65 | PB | Katie Sherlock | | 2 | | Serpentine | Parliament Hill | 23 Jun 19 | |
| 296 | 44.65 | | | 42.46i | | Keira Devereux | | 1 | Julian Emery | North Somerset | Swindon | 20 Jul 19 | |
| 296 | 44.65 | i | | 40.54 | | Holly Ovens | | 1 | Steven Doig | Fife | Emirates Arena | 1 Dec 19 | |
| 299 | 44.66 | i | | 44.61 | | Molly Reville | | 2 | Linda Nicholson | Edinburgh AC | Emirates Arena | 5 Jan 19 | |
| 299 | 44.66 | | | 44.66 | PB | Amelia Riggott | | 2 | | Tavistock | Exeter | 2 Jun 19 | |
| 301 | 44.68 | | | 44.68 | PB | Maisie Riddell | | 1 | | Folkestone | Gillingham | 22 Jun 19 | |
| 302 | 44.69 | | | 44.69 | PB | Isla Raeburn | | 2 | | Kilmarnock | Kilmarnock | 11 Jun 19 | |
| 303 | 44.7 | | | 42.05 | | Hannah Kinane | | 1 | | Swansea | Cheltenham | 18 May 19 | |
| 45.38 | | | | | | | | | | Yate | 23 Jun 19 | |
| 303 | 44.7 | | | 45.53/44.7 | PB | Miah Blackburn | | 2 | | East Grinstead | Lewes | 18 May 19 | |
| 45.53 | | | | | | | | | | Crawley | 8 Jun 19 | |
| 303 | 44.7 | | | 44.7 | PB | Mairi Harrison | | 2 | | Manx | Stretford | 22 Jun 19 | |
| 303 | 44.7 | | | 46.87/44.7 | PB | Hope Sankey | | 2 | | Eastbourne | Brighton | 28 Jun 19 | |
| 46.87 | | | | | | | | | | Crawley | 20 Apr 19 | |
| 303 | 44.7 | | | 45.37/44.7 | PB | Jessica Heng | | 2 | | Isle of Wight | Sandown | 14 Jul 19 | |
| 45.55 | | | | | | | | | | Portsmouth | 11 May 19 | |
| 303 | 44.7 | | | 45.29/44.7 | PB | Idowu Taiwo | | 1 | Les Hall | Bolton | Macclesfield | 20 Jul 19 | |
| 45.29 | | | | | | | | | | Stretford | 8 Jun 19 | |
| 303 | 44.7 | | | 45.20i/44.7 | PB | Darcie Black | | 1 | Victoria Stephen | Dunfermline Track & Field | Grangemouth | 24 Aug 19 | |
| 45.20 | i | | | | | | | | | Emirates Arena | 1 Dec 19 | |
| 303 | 44.7 | | | 48.20/44.7 | PB | Rachel Tyler | | 2 | | East Grinstead | Brighton | 30 Aug 19 | |
| 311 | 44.76 | | | 44.76 | PB | Hannah Follett | | 1 | | Cumbria Schs | Birmingham | 1 Jul 19 | |
| 311 | 44.76 | | | 44.76 | PB | Lucy Thomson | | 1 | | Team East Lothian | Grangemouth | 10 Aug 19 | |
| 313 | 44.77 | | | 44.77 | PB | Caitlin Dodds | | 2 | Richard Massey | Mansfield | Derby | 23 Jun 19 | |
| 314 | 44.80 | | | 44.80 | PB | Emily Grace | | 2 | | Newport H | Brecon | 10 Jul 19 | |
| 314 | 44.80 | | | 44.80 | PB | Ciara Addison | | 2 | | North Devon | Braunton | 11 Aug 19 | |
| 316 | 44.8 | | | 45.54/44.8 | PB | Isabelle Burke | | 2 | Peter Shaw | Sale Harriers Manchester | Lancaster | 6 Jul 19 | |
| 45.54 | | | | | | | | | | Stretford | 27 May 19 | |
| 316 | 44.8 | | | 44.8 | PB | Abbie Henderson | | 2 | Steve Perkin | Chiltern | Wormwood Scrubs | 20 Jul 19 | |
| 316 | 44.8 | | | 44.8 | PB | Haulwen Davies | | 2 | Alan Easey | Worthing | Worthing | 20 Jul 19 | |
| 316 | 44.8 | | | 42.2 | | Martha Rayner | | 1 | Peter Crook | Preston | Litherland | 3 Aug 19 | |
| 320 | 44.82 | i | | 44.82i | PB | Annabel Mobley | | 2 | Andrew Mihranian | Stockport | Sportcity | 10 Mar 19 | |
| 320 | 44.82 | | | 44.82 | PB | Annabelle Ita | | 2 | | Derby | Derby | 18 May 19 | |
| 322 | 44.83 | | | 44.83 | PB | Lily Middleton | | 2 | | Team East Lothian | Grangemouth | 19 May 19 | |
| 323 | 44.84 | | | 42.47 | | Erin MacFarlane | | 1 | John Wands | Pitreavie | Dunfermline | 6 Apr 19 | |
| 323 | 44.84 | | | 44.84 | PB | Kirsten Bowie | | 2 | | Livingston | Livingston | 17 Apr 19 | |
| 325 | 44.86 | | | 44.86 | PB | Amy McLeod | | 2 | | City of Portsmouth | Portsmouth | 11 May 19 | |
| 326 | 44.87 | | | 44.87 | PB | Hannah Cooper | | 1 | | Leamington | Coventry | 1 May 19 | |
| 327 | 44.88 | i | | 44.88i | PB | Alanna MacKenzie | | 2 | | Inverness | Emirates Arena | 7 Feb 19 | |
| 45.55 | | | | | | | | | | Inverness | 11 May 19 | |
| 327 | 44.88 | | | 44.88 | PB | Sophie McInnes | | 1 | | Airdrie Harriers | Scotstoun | 23 Jun 19 | |
| 329 | 44.90 | | | 44.90 | PB | Lucy Aplin | | 2 | Ian Grime | Salford H | Stretford | 8 Jun 19 | |
| 330 | 44.9 | | | 44.9 | PB | Amelia Rowe | | 2 | | Worcestershire Schs | Stourport | 12 May 19 | |
| 330 | 44.9 | | | 44.65 | | Charlotte Black | | 2 | | Sussex Schs | Erith | 15 Jun 19 | |
| 45.37 | | | | | | | | | | Crawley | 8 Jun 19 | |
| 330 | 44.9 | | | 44.5 | | Lucy Richardson | | 2 | Robert Hughes | Cannock & Stafford | Tamworth | 23 Jun 19 | |
| 330 | 44.9 | | | 45.68/44.9 | PB | Olivia Wauters | | 2 | | Blackheath & Bromley | Ashford | 7 Jul 19 | |
| 45.68 | | | | | | | | | | Ashford | 12 May 19 | |
| 330 | 44.9 | | | 44.63i | | Cara Duncan | | 1 | Craig Duncan | Braintree | Braintree | 21 Jul 19 | |
| 330 | 44.9 | | | 45.57/44.9 | PB | Madelyn Schneider | | 2 | Keith Palmer | Southend | Braintree | 21 Jul 19 | |
| 45.57 | | | | | | | | | | Southend | 26 Aug 19 | |
| 330 | 44.9 | | | 44.29 | | Calypso Newman | | 2 | | Invicta East Kent | Gillingham | 4 Aug 19 | |
| 330 | 44.9 | | | 44.9 | PB | Natalie Sewell | | 2 | Eileen Naylor | Havering | Bedford | 11 Aug 19 | |
| 338 | 44.91 | | | 43.69 | | Ellen McMurdo | | 2 | | Stornoway | Grangemouth | 7 Jun 19 | |
| 339 | 44.92 | | | 44.92 | PB | Natalie Walsh | | 1 | | Goole Youth | Grantham | 11 May 19 | |
| 340 | 44.95 | i | | 44.95i | PB | Gabrielle Phelan | | 2 | Sarah Kearney | Wirral | Sportcity | 15 Dec 19 | |
| 46.29 | | | | | | | | | | Stretford | 22 Apr 19 | |
| 341 | 44.97 | | | 44.97 | PB | Charli Sampson | | 2 | Joe McColgan | Charnwood | Loughborough | 10 Jun 19 | |
| 342 | 44.98 | i | | 44.82 | | Charlotte Price | | 2 | Gareth Weir | Bracknell AC | Lee Valley | 6 Jan 19 | |
| 343 | 45.00 | | | 45.00 | PB | Sophia Reid-Thomas | | 1 | | Carmarthen | Swansea | 29 Jun 19 | |
| 344 | 45.0 | | | 44.73 | | Lauren Pawson | | 2 | John Dill | Swindon | Cheltenham | 6 May 19 | |
| 45.29 | | | | | | | | | | Swindon | 18 May 19 | |
| 344 | 45.0 | | | 43.41/42.5 | | Megan Leigh | | 1 | | Chorley ATC | Blackpool | 11 May 19 | |
| 344 | 45.0 | | | 44.2 | | Ebony Blackwell | | 1 | Graham Millican | Copeland | Litherland | 18 May 19 | |
| 344 | 45.0 | | | 45.0 | PB | Glenda Eyram | | 2 | | Croydon | Reading | 23 Jun 19 | |
| 344 | 45.0 | | | 45.54/45.0 | PB | Keira Hulks | | 2 | | Thanet AC | Ashford | 7 Jul 19 | |
| 45.54 | | | | | | | | | | Ashford | 12 May 19 | |
| 344 | 45.0 | | | 42.5 | | Lauren Waddington | | 1 | Katie Hewison | Chorley ATC | Ashton | 20 Jul 19 | |
| 344 | 45.0 | | | 45.15/42.8 | | Daisy Aspinall | | 1 | Robert Hughes | Cannock & Stafford | Solihull | 20 Jul 19 | |
| 45.15 | | | | | | | | | | Leamington | 7 Aug 19 | |
| 344 | 45.0 | | | 45.79/45.0 | PB | Iona Fisher | | 2 | | Belgrave | Tooting Bec | 20 Jul 19 | |
| 45.79 | | | | | | | | | | Tooting Bec | 29 Jun 19 | |
| 352 | 45.01 | | | 45.01 | PB | Abigail Howard | | 2 | Matt Cullen | Bury | Stretford | 6 May 19 | |
| 353 | 45.02 | | | 44.18 | | Lily Meers | | 2 | Andy Frankish | Blackheath & Bromley | Bromley | 3 Jun 19 | |
| 354 | 45.03 | | | 45.03/44.9 | PB | Grace Fielder | | 1 | Steve Shaw | Taunton | Exeter | 2 Jun 19 | |
| 355 | 45.04 | i | | 45.04i | PB | Libby White | | 1 | David Watson | Ayr Seaforth | Emirates Arena | 5 Jan 19 | |
| 356 | 45.05 | | | 45.05 | PB | Abigail Elizabeth Leiper | | 2 | | Morpeth | Hexham | 20 Jul 19 | |
| 357 | 45.06 | | | 45.06 | PB | Katie Christie | | 2 | John Pentecost | Falkirk | Livingston | 19 Jun 19 | |
| 358 | 45.09 | i | | 45.09i | PB | Amelia Taylor | | 2 | Eddie Cockayne | Birchfield H | Birmingham | 17 Feb 19 | |
| 358 | 45.09 | | | 45.09/44.7 | PB | Erin Dillon | | 2 | Ronnie Price | Wirral | Liverpool | 18 May 19 | |
| 360 | 45.10 | | | 45.10 | PB | Jessica Lorimer | | 2 | | Edinburgh AC | Meadowmill | 31 Mar 19 | |
| 361 | 45.1 | | | 45.1 | PB | Jesse Dent | | 2 | | Hertfordshire Schs | Hemel Hempstead | 8 Jun 19 | |
| 361 | 45.1 | | | 45.1 | PB | Lois Richardson | | 2 | | Kingston upon Hull | Rotherham | 22 Jun 19 | |
| 361 | 45.1 | | | 45.53/45.1 | PB | Abigail O'Dwyer | | 1 | | Tonbridge | Reading | 23 Jun 19 | |
| 45.53 | | | | | | | | | | Ashford | 12 May 19 | |
| 361 | 45.1 | | | 46.61/45.1 | PB | Ella Van Der Veen | | 1 | | Horsham Blue Star | Crawley | 25 Jul 19 | |
| 46.61 | | | | | | | | | | Crawley | 20 Apr 19 | |
| 365 | 45.11 | | | 45.11 | PB | Tallulah Watson | | 2 | Richard Caburn | Taunton | Yeovil | 8 Jun 19 | |
| 365 | 45.11 | | | 45.11 | PB | Ella Panayiotou | | 2 | | Sussex Schs | Birmingham | 1 Jul 19 | |
| 367 | 45.12 | | | 45.12 | PB | Ella Creamer | | 2 | Tom Leeson | Banchory Stonehaven | Aberdeen | 28 Apr 19 | |
| 367 | 45.12 | | | 44.41/43.7 | | Maisie Scamp | | 2 | | BRAT | Birmingham (U) | 3 Jul 19 | |
| 369 | 45.13 | | | 45.13 | PB | Melissa McClusker | | 2 | | Millfield Sch | Birmingham | 1 Jul 19 | |
| 370 | 45.14 | | | 45.14 | PB | Rebecca Rossiter | | 2 | Andrew Han | Loughview AC | Bangor | 9 Apr 19 | |
| 370 | 45.14 | | | 45.14 | PB | Marci Walsh | | 1 | | Rotherham | Cudworth | 11 Aug 19 | |
| 370 | 45.14 | | | 43.41 | | Elise Horner | | 1 | | Halifax | Cudworth | 1 Sep 19 | |
| 373 | 45.16 | | | 45.16 | PB | Thea Piercy | | 1 | Simon Prior | Mendip | Yeovil | 8 Jun 19 | |
| 374 | 45.17 | | | 45.17 | PB | Lauren Prosser | | 1 | | Newport H | Aberdare | 4 Aug 19 | |
| 375 | 45.19 | | | 45.19/44.8 | PB | Florence Roberts | | 2 | | Harrogate | York | 6 May 19 | |
| 376 | 45.2 | | | 45.2 | PB | Chrissy Afriyie Amponsah | | 2 | | Croydon | Ewell | 22 Apr 19 | |
| 376 | 45.2 | | | 44.6 | | Ketshia Makita | | 2 | | Leicester | Stoke | 18 May 19 | |
| 376 | 45.2 | | | 40.17 | | Sophie Osborn | | 1 | Stuart Flack | Epsom & Ewell | Walton | 1 Jun 19 | |
| 46.41 | | | | | | | | | | Kingston | 31 Aug 19 | |
| 376 | 45.2 | | | 45.2 | PB | Ruby Naughton | | 1 | | Victoria Park & Tower Hamlets | Chelmsford | 6 Jul 19 | |
| 376 | 45.2 | | | 45.99/45.2 | PB | Annie Buckingham | | 2 | | Radley | Sutton Coldfield | 7 Jul 19 | |
| 45.99 | | | | | | | | | | Horspath | 11 May 19 | |
| 376 | 45.2 | | | 45.2 | PB | Lucy Clitheroe | | 2 | | St. Helens Sutton | Warrington | 20 Jul 19 | |
| 376 | 45.2 | | | 43.68 | | Alexa Boole | | 2 | David Clay | Nene Valley | Braintree | 21 Jul 19 | |
| 46.27 | | | | | | | | | | Grantham | 11 May 19 | |
| 376 | 45.2 | | | 45.27i/45.2 | PB | Martha Willetts | | 1 | | West Cheshire | Warrington | 11 Aug 19 | |
| 45.37 | | | | | | | | | | Stretford | 27 May 19 | |
| 384 | 45.21 | | | 45.21 | PB | Charlotte Back | | 2 | | Tonbridge | Crawley | 8 Jun 19 | |
| 384 | 45.21 | | | 45.21 | PB | Lizzie Elderfield | | 2 | | Exeter | Tavistock | 14 Jul 19 | |
| 386 | 45.22 | | | 43.93 | | Darcy Breen | | 1 | | Stockport | Stretford | 22 Apr 19 | |
| 386 | 45.22 | | | 43.18 | | Tyra Coker | | 1 | | Windsor Slough Eton & Hounslow | Reading | 12 May 19 | |
| 388 | 45.23 | | | 45.23 | PB | Hermione Ford | | 2 | Stuart Flack | Guildford & Godalming | Kingston | 12 May 19 | |
| 388 | 45.23 | | | 45.23 | PB | Leah Green | | 2 | | City of Plymouth | Exeter | 8 Jun 19 | |
| 388 | 45.23 | | | 44.88 | | Eve Datnow | | 2 | David Wilkinson | Thames Valley | Hendon | 27 Jul 19 | |
| 388 | 45.23 | | | 44.14 | | Georgina Burrows | | 1 | | Wells City | Yeovil | 8 Sep 19 | |
| 392 | 45.24 | | | 44.00 | | Amelie Carpentier | | 1 | Tom Druce | Guernsey | St. Peter Port | 16 May 19 | |
| 392 | 45.24 | | | 45.24 | PB | Mary Drewett | | 1 | Chris Styles | Vale of Aylesbury | Horspath | 22 May 19 | |
| 394 | 45.25 | | | 45.25 | PB | Ceri Griffiths | | 1 | Darryn McAtee | Newport H | Cardiff Met | 27 Jul 19 | |
| 395 | 45.26 | | | 45.26 | PB | Tara Nathan | | 1 | | Pontyclun | Swansea | 24 Aug 19 | |
| 396 | 45.27 | | | 45.27 | PB | Fiona Ogbonna | | 1 | | Essex Schs | Chelmsford | 8 Jun 19 | |
| 397 | 45.29 | | | 43.69 | | Jemima Crocker | | 2 | | Reading AC | Hornchurch | 18 May 19 | |
| 397 | 45.29 | | | 45.29/43.7 | PB | Ruby Ibbotson | | 1 | | Taunton | Exeter | 4 Aug 19 | |
| 399 | 45.3 | | | 40.02 | | Jessica Lee | | 1 | | Carmarthen | Haverfordwest | 4 May 19 | |
| 399 | 45.3 | | | 45.3 | PB | Emma Cormack | | 2 | | Perth Strathtay | Perth | 5 May 19 | |
| 399 | 45.3 | | | 45.3 | PB | Lara May | | 1 | | St. Mary's Richmond | Hillingdon | 18 May 19 | |
| 399 | 45.3 | | | 47.29/45.3 | PB | Jade Adenuga | | 2 | | Basildon | Chelmsford | 2 Jun 19 | |
| 399 | 45.3 | | | 43.9 | | Ryley Malone-Priest | | 2 | | Halesowen | Tamworth | 23 Jun 19 | |
| 399 | 45.3 | | | 45.3 | PB | Aaliah Al-Shehab | | 1 | Peter Wareing | Southampton | Bournemouth | 14 Jul 19 | |
| 399 | 45.3 | | | 45.35/45.3 | PB | Lucie Miller | | 1 | | Jersey | St. Clement | 14 Jul 19 | |
| 45.35 | | | | | | | | | | Ashford | 17 Aug 19 | |
| 399 | 45.3 | | | 46.85/45.3 | PB | Amelie Mason | | 2 | | Braintree | Braintree | 21 Jul 19 | |
| 46.85 | | | | | | | | | | Chelmsford | 11 May 19 | |
| 399 | 45.3 | | | 46.01i/44.4 | | Amelia Newell | | 1 | Kerry Newell | Gloucester | Yate | 11 Aug 19 | |
| 46.67 | | | | | | | | | | Swindon | 18 May 19 | |
| 408 | 45.31 | | | 45.19 | | Olivia Boyle | | 1 | Thomas Graham | Whitemoss | Grangemouth | 19 May 19 | |
| 408 | 45.31 | | | 43.61 | | Azaria Nwankwo | | 1 | | Shaftesbury Barnet | Parliament Hill | 23 Jun 19 | |
| 410 | 45.32 | | | 45.00 | | Emily Rycroft | | 2 | | Notts | Nottingham | 31 Mar 19 | |
| 410 | 45.32 | | | 45.32 | PB | Ffion Brown | | 1 | Tony John | Neath | Neath | 23 Jun 19 | |
| 412 | 45.34 | | | 45.22 | | Anna Crossley | | 1 | Alan Prescott | Liverpool H | Sheffield | 20 Jul 19 | |
| 413 | 45.35 | | | 45.22i | | Isabel Wildgoose | | 2 | | Herts Phoenix | Battersea | 22 Jun 19 | |
| 413 | 45.35 | | | 45.35 | PB | Nia Beynon | | 2 | | Cardiff Archers | Cardiff | 14 Jul 19 | |
| 415 | 45.36 | | | 45.36/45.3 | PB | Maisie French | | 2 | James Mole | North Shields Poly | Hexham | 18 May 19 | |
| 416 | 45.37 | | | 45.37 | PB | Imogen Lillie | | 2 | | Middlesbrough (Mandale) | Middlesbrough | 24 Mar 19 | |
| 416 | 45.37 | | | 45.37 | PB | Alice Matthews | | 1 | | Bristol & West | Swindon | 20 Jul 19 | |
| 416 | 45.37 | | | 45.37 | PB | Ruby Handley | | 2 | | Barnsley AC | Cudworth | 11 Aug 19 | |
| 419 | 45.38 | | | 45.38 | PB | Connie Roxburgh | | 1 | | Edinburgh AC | Meadowmill | 31 Mar 19 | |
| 420 | 45.39 | | | 45.39 | PB | Charlotte Graham | | 1 | Karen Storey | Gateshead | Middlesbrough | 23 Jun 19 | |
| 421 | 45.40 | i | | 45.40i | PB | Lorien Carnegie | | 2 | | Inverclyde | Emirates Arena | 7 Feb 19 | |
| 45.54 | | | | | | | | | | Grangemouth | 7 Jun 19 | |
| 421 | 45.40 | | | 45.40 | PB | Olivia Foster | | 2 | | Torbay | Exeter | 8 Jun 19 | |
| 423 | 45.4 | | | 45.78/45.4 | PB | Caitlin Keaney | | 2 | Martin Gray | Cornwall AC | Par | 11 May 19 | |
| 423 | 45.4 | | | 45.4 | PB | Erin Goldring | | 1 | | Cornwall AC | Carn Brea | 8 Jun 19 | |
| 423 | 45.4 | | | 45.4 | PB | Jessica Hill | | 2 | Arthur Daley | Gloucester | Gloucester | 9 Jun 19 | |
| 423 | 45.4 | | | 45.4 | PB | Libby McLauchlan | | 2 | | Essex Schs | Chelmsford | 6 Jul 19 | |
| 423 | 45.4 | | | 45.4 | PB | Natalie Simmons | | 2 | Alex Stanton | Bedford & County | Ware | 7 Jul 19 | |
| 428 | 45.41 | | | 44.34 | | Mimi Nightingale | | 2 | Philip Budd | City of Portsmouth | Portsmouth | 11 May 19 | |
| 428 | 45.41 | | | 45.41 | PB | Hannah Noble | | 2 | | Retford | Grimsby | 27 May 19 | |
| 430 | 45.43 | | | 45.43 | PB | Emilia Jensen | | 2 | | Berkshire Schs | Birmingham | 1 Jul 19 | |
| 431 | 45.44 | | | 45.44 | PB | Annabel Bee | | 2 | | Berkshire Schs | Reading | 8 Jun 19 | |
| 432 | 45.46 | | | 45.46 | PB | Rebecca Evans | | 1 | | Sheffield & Dearne | Shefield | 25 May 19 | |
| 432 | 45.46 | | | 45.46/44.9 | PB | Kitty Pickering | | 1 | | New Forest Junior | Birmingham | 1 Jul 19 | |
| 434 | 45.47 | | | 42.88 | | Lola McCann-Ezekiel | | 1 | Ty Holden | Shaftesbury Barnet | Lee Valley | 12 May 19 | |
| 435 | 45.49 | | | 45.49 | PB | Shenae Reid | | 2 | | S Factor | Tonbridge | 22 Apr 19 | |
| 435 | 45.49 | | | 45.49 | PB | Leah Hoole | | 2 | | Blackburn | Sheffield | 20 Jul 19 | |
| 437 | 45.50 | | | 45.50 | PB | Amelia Norton | | 2 | | Cardiff Archers | Cardiff | 22 May 19 | |
| 438 | 45.5 | | | 45.5 | PB | Naomi Holdsworth | | 2 | Paul Simpson | Isle of Wight | Winchester | 7 Apr 19 | |
| 438 | 45.5 | | | 45.34 | | Carly York | | 2 | Daniel Brooker | Brighton & Hove | Southampton | 27 Apr 19 | |
| 438 | 45.5 | | | 45.2 | | Ella Crowe | | 2 | Gordon Crowe | Northern (Isle of Man) | Blackpool | 11 May 19 | |
| 438 | 45.5 | | | 47.73i/45.5 | PB | Rebecca Dilworth | | 1 | Alison Hartopp | Macclesfield | Bury | 18 May 19 | |
| 438 | 45.5 | | | 46.05i/44.7 | | Abbie Birchenough | | 2 | | Crewe & Nantwich | Litherland | 18 May 19 | |
| 438 | 45.5 | | | 45.69/45.5 | PB | Isabelle Bryan | | 1 | Paul Roden | Salford H | Litherland | 18 May 19 | |
| 46.07 | | | | | | | | | | Stretford | 6 May 19 | |
| 438 | 45.5 | | | 45.5 | PB | Isla Cooper | | 2 | | Annan | Carlisle | 25 May 19 | |
| 438 | 45.5 | | | 45.5 | PB | Tamara Hibbins | | 2 | Trevor Raggett | Windsor Slough Eton & Hounslow | Aldershot | 2 Jun 19 | |
| 438 | 45.5 | | | 45.5 | PB | Poppy Etton | | 2 | | Herefordshire Schs | Worcester | 8 Jun 19 | |
| 438 | 45.5 | | | 46.37/45.5 | PB | Lauren Baldwin | | 2 | | Surrey Schs | Chelmsford | 6 Jul 19 | |
| 46.37 | | | | | | | | | | Kingston | 8 Jun 19 | |
| 438 | 45.5 | | | 45.5 | PB | Tilly Lainchbury | | 1 | | Banbury | Sutton Coldfield | 7 Jul 19 | |
| 438 | 45.5 | | | 45.73/45.5 | PB | Sophia Horwood | | 2 | | Poole AC | Sandown | 14 Jul 19 | |
| 45.73 | | | | | | | | | | Exeter | 4 Aug 19 | |
| 438 | 45.5 | | | 45.86i/45.5 | PB | Scarlet Hamilton | | 2 | Ian Halliday | Bury | Macclesfield | 20 Jul 19 | |
| 438 | 45.5 | | | 46.80/45.5 | PB | Millie Loran | | 2 | | Hillingdon | Eton | 14 Sep 19 | |
| 46.80 | | | | | | | | | | Eton | 7 Apr 19 | |
| 452 | 45.51 | | | 43.03 | | Neve Davenport | | 2 | Andrew Wood | Trafford | Stretford | 22 Apr 19 | |
| 453 | 45.58 | i | | 45.58i | PB | Sylvie Plaskow | | 2 | Phillip Kissi | Blackheath & Bromley | Lee Valley | 6 Jan 19 | |
| 46.00 | | | | | | | | | | Hornchurch | 18 May 19 | |
| 46.7 | | | | | | | | | | Tooting Bec | 27 Apr 19 | |
| 453 | 45.58 | | | 45.58 | PB | Taylor Fitchet | | 2 | | Dundee Hawkhill | Aberdeen | 28 Apr 19 | |
| 453 | 45.58 | i | | 42.85 | | Zara Burns | | 2 | Andrew Wood | Trafford | Sportcity | 15 Dec 19 | |
| 456 | 45.59 | | | 45.59 | PB | Ava Bruce | | 2 | | Giffnock North | Scotstoun | 23 Jun 19 | |
| 457 | 45.60 | | | 45.60 | PB | Amelie Owen | | 1 | | Shrewsbury | Birmingham | 15 Jun 19 | |
| 458 | 45.6 | | | 45.6 | PB | Ella Davies | | 2 | John Griffiths | Swansea | Swansea | 11 May 19 | |
| 458 | 45.6 | | | 49.10/45.6 | PB | Emily Hinton | | 2 | Michael Lewis | Silson | Corby | 12 May 19 | |
| 458 | 45.6 | | | 43.99i | | Mya Turner | | 1 | Keeley Sutton | Notts | Nottingham | 18 May 19 | |
| 46.73 | | | | | | | | | | Nottingham | 31 Mar 19 | |
| 458 | 45.6 | | | 45.6 | PB | Marta Starczewska | | 2 | | Liverpool H | Bebington | 8 Jun 19 | |
| 458 | 45.6 | | | 45.6 | PB | Alice Brown | | 2 | Steve Perkin | Chiltern | Sandy | 22 Jun 19 | |
| 458 | 45.6 | | | 47.57/45.6 | PB | Eloise da Costa | | 2 | | Waverley | Andover | 7 Jul 19 | |
| 458 | 45.6 | | | 45.6 | PB | Jasmine Loveridge | | 2 | | Blackpool, Wyre & Fylde | Macclesfield | 20 Jul 19 | |
| 458 | 45.6 | | | 45.82/45.6 | PB | Jessica Daly | | 2 | Nigel Brooks | Tonbridge | Gillingham | 4 Aug 19 | |
| 46.18 | | | | | | | | | | Hornchurch | 18 May 19 | |
| 458 | 45.6 | | | 47.36/43.7 | | Jenny Critchley | | 1 | | Bicester | Banbury | 11 Aug 19 | |
| 467 | 45.63 | | | 45.63 | PB | Francesca Manrow | | 1 | | Reigate Priory | Battersea | 22 Jun 19 | |
| 468 | 45.64 | | | 45.16 | | Emma Tillott | | 2 | Matthew Holloway | Gloucester | Swindon | 18 May 19 | |
| 468 | 45.64 | | | 45.64 | PB | Chloe Hale | | 1 | | Carmarthen | Swansea | 25 Aug 19 | |
| 470 | 45.65 | | | 45.65 | PB | Niamh Boyd | | 2 | Richard Goddard | Sale Harriers Manchester | Stretford | 22 Apr 19 | |
| 471 | 45.66 | | | 40.19/40.1 | | Caitlyn Harvey | | 1 | | Kingston & Poly | Crawley | 20 Apr 19 | |
| 471 | 45.66 | | | 44.74 | | Zara English | | 2 | Dean Exton | Dorchester | Eton | 20 Jul 19 | |
| 473 | 45.67 | i | | 45.67i | PB | Sophie Holmes | | 2 | | Edinburgh AC | Emirates Arena | 27 Oct 19 | |
| 46.4 | | | | | | | | | | Grangemouth | 24 Aug 19 | |
| 474 | 45.68 | | | 45.68 | PB | Freya Buglass | | 2 | | Avon Valley | Swindon | 8 Jun 19 | |
| 474 | 45.68 | | | 45.68 | PB | Joanne Oluwaji | | 1 | John Gates | Bexley | Mile End | 20 Jul 19 | |
| 476 | 45.70 | | | 45.70/44.2 | PB | Holly Gordon | | 1 | Steven Alan Thompson | Pitreavie | Grangemouth | 11 May 19 | |
| 476 | 45.70 | | | 45.70 | PB | Margot Ward | | 2 | | Oxford City | Horspath | 17 Jul 19 | |
| 476 | 45.70 | | | 45.70 | PB | Isla Scott | | 2 | Dudley Walker | Giffnock North | Kilmarnock | 25 Aug 19 | |
| 479 | 45.7 | | | 45.78/44.6 | | Kerrie Shanley | | 2 | | Newquay & Par | Par | 6 Apr 19 | |
| 45.78 | | | | | | | | | | Exeter | 2 Jun 19 | |
| 479 | 45.7 | | | 43.14i/42.8 | | Hannah Pain | | 2 | Michael Brown | City of Norwich | Norwich | 11 May 19 | |
| 45.92 | i | | | | | | | | | Lee Valley | 3 Feb 19 | |
| 479 | 45.7 | | | 47.51i/45.7 | PB | Ellie-Ann Tuitt-Williams | | 1 | | Warrington AC | Warrington | 11 May 19 | |
| 479 | 45.7 | | | 42.94 | | Kae Crisp | | 1 | Barry Crisp | Northampton | Corby | 12 May 19 | |
| 479 | 45.7 | | | 45.70/45.3 | | Lulu Skurek | | 1 | | Cheltenham | Cheltenham | 18 May 19 | |
| 46.67 | | | | | | | | | | Yate | 23 Jun 19 | |
| 479 | 45.7 | | | 47.02/45.7 | PB | Ella Hampstead | | 2 | | Hertfordshire Schs | Hemel Hempstead | 8 Jun 19 | |
| 479 | 45.7 | | | 45.7 | PB | Hattie Madden | | 2 | | Sedbergh | Blackpool | 19 Jun 19 | |
| 479 | 45.7 | | | 43.94/43.9 | | Lucy Webster | | 1 | Karen Storey | Gateshead | Rotherham | 22 Jun 19 | |
| 45.96 | | | | | | | | | | Middlesbrough | 12 May 19 | |
| 479 | 45.7 | | | 45.7 | PB | Odunayo Orungbemi | | 1 | | Crewe & Nantwich | Wigan | 20 Jul 19 | |
| 479 | 45.7 | | | 43.69 | | Jessica Lewis | | 1 | Darrell Smith | Sevenoaks | Gillingham | 4 Aug 19 | |
| 479 | 45.7 | | | 46.50/45.7 | PB | Tilly Westbrook | | 2 | | Abingdon | Abingdon | 8 Sep 19 | |
| 46.50 | | | | | | | | | | Horspath | 11 May 19 | |
| 479 | 45.7 | | | 45.81/45.5 | | Dana Fraser | | 2 | | Cambridge & Coleridge | Bury St Edmunds | 8 Sep 19 | |
| 45.81 | | | | | | | | | | Bedford | 15 Sep 19 | |
| 479 | 45.7 | | | 46.78/45.7 | PB | Bethany Austin | | 2 | Adrian Brown | Bracknell AC | Eton | 14 Sep 19 | |
| 46.78 | | | | | | | | | | Reading | 12 May 19 | |
| 492 | 45.71 | | | 45.71 | PB | Sophia Graham | | 2 | | Arbroath & District | Dunfermline | 1 Sep 19 | |
| 493 | 45.73 | | | 44.81 | | Erin Cox | | 1 | | Lincolnshire Schs | Grantham | 11 May 19 | |
| 494 | 45.74 | | | 39.87 | | Olivia Bell | | 1 | Richard Harris | Rotherham | Doncaster | 6 Jul 19 | |
| 495 | 45.75 | | | 45.75 | PB | Victoria Taylor | | 2 | | Sussex Schs | Birmingham | 1 Jul 19 | |
| 496 | 45.76 | i | | 45.62i | | Emma McMillan | | 2 | Conor Rennie | Ayr Seaforth | Emirates Arena | 27 Oct 19 | |
| 46.74 | | | | | | | | | | Kilmarnock | 11 Jun 19 | |
| 497 | 45.77 | | | 43.13 | | Carly Smith | | 1 | | Edinburgh AC | Meadowmill | 31 Mar 19 | |
| 498 | 45.78 | | | 45.78 | PB | Eloise Dickinson | | 2 | | Northumberland Schs | Birmingham | 1 Jul 19 | |
| 499 | 45.79 | | | 45.79 | PB | Jessie Sargeant | | 2 | John Gates | Bexley | Dartford | 24 Jul 19 | |
| 499 | 45.79 | i | | 43.34 | | Lucy Moynihan | | 1 | | | Emirates Arena | 1 Dec 19 | |
| 501 | 45.8 | | | 45.00/44.5 | | Megan Hughes | | 1 | | Colwyn Bay | Stretford | 18 May 19 | |
| 45.95 | | | | | | | | | | Cardiff | 6 Jul 19 | |
| 501 | 45.8 | | | 46.91/45.8 | PB | Kimberley Knight | | 1 | | Newquay & Par | Carn Brea | 8 Jun 19 | |
| 501 | 45.8 | | | 46.97/45.8 | PB | Olivia Carruthers | | 2 | | Elswick | Hexham | 8 Jun 19 | |
| 46.97 | | | | | | | | | | Middlesbrough | 12 May 19 | |
| 501 | 45.8 | | | 46.34/45.7 | | Lauren Frodsham | | 2 | | Wigan & District | Stretford | 22 Jun 19 | |
| 501 | 45.8 | | | 45.86/45.8 | PB | Kiera Griffiths | | 2 | Peter Ryder | Aberdare Valley | Gloucester | 23 Jun 19 | |
| 46.92 | | | | | | | | | | Aberdare | 29 Jun 19 | |
| 501 | 45.8 | | | 46.15/45.8 | PB | Carrissa Baxter | | 1 | | Basildon | Chelmsford | 6 Jul 19 | |
| 46.15 | | | | | | | | | | Mile End | 20 Jul 19 | |
| 501 | 45.8 | | | 45.8 | PB | Elena Rivetti | | 1 | | Peterborough | Stevenage | 7 Jul 19 | |
| 501 | 45.8 | | | 45.8 | PB | Sinian McDowell | | 2 | | Herne Hill | Bromley | 20 Jul 19 | |
| 501 | 45.8 | | | 42.58 | | Lily Stewart | | 2 | | Tonbridge | Bromley | 20 Jul 19 | |
| 501 | 45.8 | | | 44.77 | | Milly Tinsley | | 2 | Carl Foster | Wigan & District | Wigan | 20 Jul 19 | |
| 46.88 | | | | | | | | | | Stretford | 27 May 19 | |
| 501 | 45.8 | | | 45.3 | | Teegan Rayner | | 2 | | Braintree | Braintree | 21 Jul 19 | |
| 501 | 45.8 | | | 44.98 | | Poppy Adkin | | 1 | Paul Hayden | Saffron AC | Nuneaton | 14 Aug 19 | |
| 45.82 | | | | | | | | | | Leamington | 4 Sep 19 | |
| 513 | 45.81 | | | 45.81 | PB | Leah Murray | | 2 | Kenneth Morgan | North Ayrshire | Kilmarnock | 11 Jun 19 | |
| 513 | 45.81 | | | 45.81 | PB | Codie Clarke | | 2 | | Devon Schs | Birmingham | 1 Jul 19 | |
| 513 | 45.81 | i | | 44.87i | | Emily Dent | | 2 | Paul Hill | Cardiff Archers | Cardiff | 1 Dec 19 | |
| 45.89 | | | | | | | | | | Aberdare | 29 Jun 19 | |
| 516 | 45.83 | | | 45.50 | | Jessica Dutton | | 2 | Gill St Barbe | North Devon | Exeter | 12 May 19 | |
| 517 | 45.84 | | | 45.84 | PB | Imogen Hadley | | 2 | Phillip Kissi | Blackheath & Bromley | Tooting | 6 May 19 | |
| 517 | 45.84 | | | 45.84 | PB | Imogen Morland | | 2 | | Derby | Derby | 18 May 19 | |
| 519 | 45.86 | | | 45.86 | PB | Nadia Sadler-Reeves | | 1 | Derek Laws | Ashford AC | Ashford | 14 Jun 19 | |
| 520 | 45.87 | i | | 45.87i | PB | Daisy Marshall | | 2 | David Rice | Hertford & Ware | Lee Valley | 17 Mar 19 | |
| 521 | 45.88 | | | 45.88 | PB | Evie Brooks | | 2 | Roy Freeman | Lincoln Wellington | Grantham | 11 May 19 | |
| 522 | 45.90 | i | | 44.56 | | Katie Clark | | 2 | Dave Combe | Dundee Hawkhill | Emirates Arena | 12 Jan 19 | |
| 46.45 | | | | | | | | | | Grangemouth | 3 Jul 19 | |
| 523 | 45.9 | | | 45.9 | PB | Maddie Hutton | | 1 | | Lancaster & Morecambe | Blackpool | 11 May 19 | |
| 523 | 45.9 | | | 46.85/45.9 | PB | Ella Bodman | | 1 | Lorraine Winton | Wimborne | Bournemouth | 11 May 19 | |
| 46.85 | | | | | | | | | | Exeter | 4 Aug 19 | |
| 523 | 45.9 | | | 45.9 | PB | Hattie Davies | | 1 | Steven Marshall | Hallamshire | Gateshead | 18 May 19 | |
| 523 | 45.9 | | | 45.93/45.9 | PB | Amira Thomas | | 2 | | Medway Phoenix | Lewes | 18 May 19 | |
| 523 | 45.9 | | | 45.9 | PB | Molly Altham | | 2 | | Lancaster & Morecambe | Blackpool | 8 Jun 19 | |
| 523 | 45.9 | | | 46.04/45.9 | PB | Katerina French | | 1 | | Newport H | Gloucester | 23 Jun 19 | |
| 46.04 | | | | | | | | | | Aberdare | 25 May 19 | |
| 523 | 45.9 | | | 46.67/45.9 | PB | Molly Richardson | | 1 | | Harrogate | Chelmsford | 6 Jul 19 | |
| 46.67 | | | | | | | | | | Middlesbrough | 23 Jun 19 | |
| 523 | 45.9 | | | 45.9 | PB | Abigail Osunde | | 2 | | Thurrock | Braintree | 7 Jul 19 | |
| 523 | 45.9 | | | 45.9 | PB | Matilda Canty | | 1 | Eileen Naylor | Havering | Braintree | 7 Jul 19 | |
| 523 | 45.9 | | | 46.06/45.0 | | Aoife Glasswell | | 1 | | Nene Valley | Ware | 7 Jul 19 | |
| 46.06 | | | | | | | | | | Hendon | 11 Aug 19 | |
| 523 | 45.9 | | | 43.76i | | Millie Walton | | 2 | Andy Bibby | Hyndburn | Litherland | 3 Aug 19 | |
| 523 | 45.9 | | | 45.9 | PB | Daisy Goodall | | 2 | | South Glos | Yate | 11 Aug 19 | |
| 535 | 45.91 | | | 45.51/44.3 | | Abbie Crawford | | 2 | Tom Leeson | Banchory Stonehaven | Aberdeen | 28 Apr 19 | |
| 535 | 45.91 | | | 45.91 | PB | Katharine Blackwell | | 2 | | Deeside AAC | Bangor | 8 Sep 19 | |
| 537 | 45.95 | | | 45.95/44.9 | PB | Ella Watson | | 2 | | Livingston | Livingston | 19 Jun 19 | |
| 538 | 45.96 | | | 45.96 | PB | Holly Holt | | 2 | | Hampshire Schs | Birmingham | 1 Jul 19 | |
| 538 | 45.96 | | | 45.35i | | Anna Fairclough | | 2 | | Gala | Grangemouth | 3 Jul 19 | |
| 540 | 45.97 | | | 44.85 | | Rosie Challender | | 1 | Keeley Sutton | Notts | Loughborough | 1 Jul 19 | |
| 541 | 45.98 | | | 45.49/44.7 | | Grace Cardwell | | 2 | Graham Howell | Yate | Yate | 23 Jun 19 | |
| 541 | 45.98 | | | 45.98 | PB | Amber Salkeld | | 1 | Barry Hearn | Marshall Milton Keynes | Yate | 20 Jul 19 | |
| 543 | 46.0 | | | 46.0 | PB | Cerys Webber | | 1 | | Lliswerry | Newport | 2 Apr 19 | |
| 543 | 46.0 | | | 46.0 | PB | Matilda Strachan | | 2 | | Royal Sutton Coldfield | Leicester | 27 Apr 19 | |
| 543 | 46.0 | | | 46.0 | PB | Kate Cookson | | 1 | | Blackburn | Blackpool | 11 May 19 | |
| 543 | 46.0 | | | 46.0 | PB | Ruby Erzan-Essien | | 2 | | Bolton | Bury | 18 May 19 | |
| 543 | 46.0 | | | 46.62i/46.0 | PB | Elizabeth Williamson | | 2 | Les Hall | Bolton | Bury | 18 May 19 | |
| 543 | 46.0 | | | 43.21/42.6 | | Rosie Harris | | 2 | | Charnwood | Stoke | 18 May 19 | |
| 543 | 46.0 | | | 46.0 | PB | Maddie McGowan | | 2 | | Hertfordshire Schs | Hemel Hempstead | 8 Jun 19 | |
| 543 | 46.0 | | | 46.0 | PB | Josie Rucker | | 2 | | Team Bath | Gloucester | 9 Jun 19 | |
| 543 | 46.0 | | | 46.12/45.7 | | Louise Hirst | | 1 | | Sleaford | Derby | 17 Jun 19 | |
| 46.12 | | | | | | | | | | Loughborough | 6 Apr 19 | |
| 543 | 46.0 | | | 44.90 | | Freya Lowe | | 1 | | Derbyshire & South Yorkshire | Derby | 17 Jun 19 | |
| 46.44 | | | | | | | | | | Derby | 8 Jun 19 | |
| 543 | 46.0 | | | 46.0 | PB | Isabel Caven | | 2 | Gary Tunstall | Preston | Bebington | 22 Jun 19 | |
| 543 | 46.0 | | | 46.0 | PB | Holly Bradshaw | | 2 | | Southport Waterloo | Stretford | 22 Jun 19 | |
| 543 | 46.0 | | | 42.97 | | May McDonald | | 1 | Derek Craig | Blaydon | Hexham | 23 Jun 19 | |
| 543 | 46.0 | | | 46.02/46.0 | PB | Katie Barnes | | 2 | | Reading AC | Reading | 23 Jun 19 | |
| 46.02 | | | | | | | | | | Hornchurch | 18 May 19 | |
| 543 | 46.0 | | | 47.98/46.0 | PB | Hebe Hunter | | 2 | James McDonald | Herne Hill | Reading | 23 Jun 19 | |
| 543 | 46.0 | | | 46.0 | PB | Josie Mawdsley | | 1 | | Bromsgrove & Redditch | Tamworth | 23 Jun 19 | |
| 543 | 46.0 | | | 44.21 | | Emily Amos | | 1 | Malcolm Taylor | Halesowen | Tamworth | 23 Jun 19 | |
| 543 | 46.0 | | | 46.0 | PB | Finity Myall | | 2 | | Camberley | Bournemouth | 14 Jul 19 | |
| 561 | 46.02 | | | 46.02 | PB | Brooke Lewis | | 2 | | Elgin | Aberdeen | 28 Apr 19 | |
| 561 | 46.02 | | | 46.02 | PB | Abi Foulerton | | 2 | | Shaftesbury Barnet | Hendon | 11 Aug 19 | |
| 563 | 46.03 | i | | 46.03i | PB | Maia Campbell | | 1 | | Livingston | Emirates Arena | 27 Jan 19 | |
| 563 | 46.03 | | | 46.03 | PB | Lucy O'Neill | | 2 | | Birchfield H | Nuneaton | 11 Aug 19 | |
| 565 | 46.05 | | | 46.05/45.3 | PB | Grace Monkhouse | | 1 | | Border | Gateshead | 15 Jun 19 | |
| 565 | 46.05 | | | 46.05 | PB | Olivia Llewellyn | | 2 | | Rhymney Valley | Aberdare | 4 Aug 19 | |
| 567 | 46.06 | | | 46.06/43.6 | PB | Jayne Elvin | | 2 | Kelvin Stone | Thurrock | Grays | 15 Sep 19 | |
| 567 | 46.06 | i | | 46.06i | PB | Ava Barrett | | 2 | Andrew Fraser | Wirral | Sportcity | 15 Dec 19 | |
| 569 | 46.07 | i | | 45.29i | | Niamh Gaffney | | 1 | Mark Stringer | North Ayrshire | Emirates Arena | 7 Feb 19 | |
| 569 | 46.07 | | | 43.56 | | Kessi Hodgins-Peka | | 2 | | Sutton & District | Carshalton | 30 Mar 19 | |
| 569 | 46.07 | | | 46.07 | PB | Madeline Lea | | 1 | Gwyn Jones | Cardiff | Aberdare | 25 May 19 | |
| 569 | 46.07 | | | 46.07 | PB | May Peate | | 1 | | Cardiff | Cardiff | 19 Jun 19 | |
| 573 | 46.09 | | | 46.09 | PB | Sophie Edison | | 2 | | London Schs | Kingston | 8 Jun 19 | |
| 573 | 46.09 | | | 46.09 | PB | Annie Mowat | | 1 | | Shetland | Lerwick | 16 Jun 19 | |
| 573 | 46.09 | | | 46.09/43.2 | PB | Bailey O'Leary | | 1 | Anne Hegvold | Hercules Wimbledon | Ashford | 17 Aug 19 | |
| 576 | 46.1 | | | 46.1 | PB | Laura Hulme | | 2 | | Shrewsbury | Telford | 2 May 19 | |
| 576 | 46.1 | | | 46.49/46.1 | PB | Zoe Brailey | | 2 | | Basildon | Watford | 4 May 19 | |
| 46.49 | | | | | | | | | | Grays | 14 Apr 19 | |
| 576 | 46.1 | | | 43.72 | | Niamh Rushton | | 2 | | Nene Valley | Peterborough | 26 May 19 | |
| 576 | 46.1 | | | 46.1 | PB | Rose Fitzgerald | | 2 | Andy Sleap | Basingstoke & Mid Hants | Horspath | 16 Jun 19 | |
| 576 | 46.1 | | | 47.90/46.1 | PB | Claudia Hargreaves | | 1 | | Southampton | Brighton | 23 Jun 19 | |
| 576 | 46.1 | | | 46.61/46.1 | PB | Isabel Edwards | | 2 | | Charnwood | Wolverhampton | 23 Jun 19 | |
| 46.61 | | | | | | | | | | Loughborough | 1 Jul 19 | |
| 576 | 46.1 | | | 45.4 | | Laura Brown | | 2 | | Barrow & Furness | Lancaster | 6 Jul 19 | |
| 576 | 46.1 | | | 46.23/46.1 | PB | Orla Roche | | 2 | | Slough Junior | Winchester | 7 Jul 19 | |
| 576 | 46.1 | | | 46.1 | PB | Libby Simpson | | 1 | | Southport Waterloo | Wigan | 20 Jul 19 | |
| 576 | 46.1 | | | 46.1 | PB | Grace Jakeman | | 2 | | Thanet AC | Gillingham | 4 Aug 19 | |
| 576 | 46.1 | | | 45.43/45.0 | | Effie Thomson | | 1 | | Orkney | Kirkwall | 25 Aug 19 | |
| 576 | 46.1 | | | 46.1 | PB | Lila Battell | | 2 | | West Suffolk | Bury St Edmunds | 8 Sep 19 | |
| 588 | 46.13 | i | | 45.88i/44.1 | | Isabel Smythe | | 2 | | City of Norwich | Lee Valley | 1 Dec 19 | |
| 46.3 | | | | | | | | | | Great Yarmouth | 23 Jun 19 | |
| 589 | 46.15 | | | 45.64 | | Amelia Smithers | | 1 | | Warrington AC | Stretford | 8 Jun 19 | |
| 589 | 46.15 | | | 46.15 | PB | Olivia Watson | | 1 | | Clydesdale | Grangemouth | 23 Jun 19 | |
| 591 | 46.16 | | | 46.16 | PB | Rebecca Cox | | 2 | Joanne Harding | Stockport | Sheffield | 20 Jul 19 | |
| 592 | 46.17 | i | | 46.17i | PB | Niamh McIntosh | | 2 | | Inverclyde | Emirates Arena | 27 Jan 19 | |
| 593 | 46.19 | | | 46.19 | PB | Hannah Clark | | 2 | Andy Frankish | Blackheath & Bromley | Bromley | 3 Jun 19 | |
| 594 | 46.20 | | | 42.29 | | Elsa McCallum | | 1 | | Willowfield | Bangor | 9 Apr 19 | |
| 595 | 46.2 | | | 43.64 | | Tiwaah Boateng | | 1 | | Newport H | Newport | 2 Apr 19 | |
| 595 | 46.2 | | | 45.52 | | Anise Mellodey | | 2 | | New Forest Junior | Winchester | 7 Apr 19 | |
| 595 | 46.2 | | | 45.62/43.6 | | Olivia Clarke | | 1 | | Shrewsbury | Telford | 11 May 19 | |
| 595 | 46.2 | | | 45.3 | | Melissa Ince | | 2 | Margaret Galvin | Leigh | Hyndburn | 18 May 19 | |
| 595 | 46.2 | | | 47.48/46.2 | PB | Mae Quinney | | 1 | | Rugby & Northampton | Nottingham | 18 May 19 | |
| 595 | 46.2 | | | 48.25/46.2 | PB | Jasmine Scott | | 2 | | St. Helens Sutton | Stretford | 18 May 19 | |
| 595 | 46.2 | | | 42.8 | | Lucci Baker | | 2 | | Jersey | St. Clement | 19 May 19 | |
| 595 | 46.2 | | | 45.10/44.4 | | Madison Torbitt | | 2 | | Wreake & Soar Valley | Kettering | 2 Jun 19 | |
| 46.84 | | | | | | | | | | Coventry | 1 May 19 | |
| 595 | 46.2 | | | 46.2 | PB | Charlotte Graham | | 1 | | Northumberland Schs | Hexham | 8 Jun 19 | |
| 595 | 46.2 | | | 46.2 | PB | Annabelle Vranall | | 2 | | Leicestershire Schs | Leicester | 8 Jun 19 | |
| 595 | 46.2 | | | 46.2 | PB | Olivia Paoli | | 2 | | Marshall Milton Keynes | Milton Keynes | 8 Jun 19 | |
| 595 | 46.2 | | | 46.2 | PB | Gwen Lightburn | | 2 | | Avon Schs | Stoke Gifford | 8 Jun 19 | |
| 595 | 46.2 | | | 46.54/45.8 | | Lucy Moore | | 2 | Steven Brick | Wirral | Bebington | 22 Jun 19 | |
| 46.54 | | | | | | | | | | Liverpool | 18 May 19 | |
| 595 | 46.2 | | | 46.94i/44.1 | | Macy Hillier | | 1 | Andrew Fox | Manx | Stretford | 22 Jun 19 | |
| 595 | 46.2 | | | 46.96/46.2 | PB | Maisie Bell | | 1 | Steve Choules | North Devon | Gloucester | 23 Jun 19 | |
| 595 | 46.2 | | | 46.2 | PB | Grace Wheeler | | 1 | James Powell | Brighton Phoenix | Brighton | 28 Jun 19 | |
| 595 | 46.2 | | | 50.15/46.2 | PB | Eva Stewart | | 1 | | Braintree | Braintree | 7 Jul 19 | |
| 595 | 46.2 | | | 46.82/46.2 | PB | Gabriela Waters | | 2 | | Belgrave | Tooting Bec | 20 Jul 19 | |
| 46.82 | | | | | | | | | | Tooting Bec | 29 Jun 19 | |
| 595 | 46.2 | | | 46.27/46.2 | PB | Angel Doyle | | 1 | Stevan Dokic | Hillingdon | Wormwood Scrubs | 20 Jul 19 | |
| 46.27 | | | | | | | | | | Lee Valley | 12 May 19 | |
| 595 | 46.2 | | | 46.2 | PB | Olivia Ware | | 2 | | Radley | Banbury | 11 Aug 19 | |
| 595 | 46.2 | | | 48.27/46.2 | PB | Hannah Yexley | | 2 | Peter Quinn | Havering | Hornchurch | 22 Sep 19 | |
| 616 | 46.24 | i | | 45.85 | | Libby Currie | | 2 | | Whitemoss | Emirates Arena | 12 Jan 19 | |
| 46.55 | | | | | | | | | | Kilmarnock | 11 May 19 | |
| 616 | 46.24 | | | 46.24 | PB | Abigail Harris | | 2 | | Hertfordshire Schs | Birmingham | 1 Jul 19 | |
| 618 | 46.25 | | | 46.25 | PB | Lila Wainwright | | 2 | | Trafford | Stretford | 22 Apr 19 | |
| 618 | 46.25 | | | 44.00 | | Ella Isaias | | 2 | David Bee | Erme Valley | Exeter | 4 Aug 19 | |
| 620 | 46.26 | | | 46.26 | PB | Evie Blow | | 1 | | Nene Valley | Loughborough | 29 Jul 19 | |
| 621 | 46.27 | | | 44.16 | | Emily Watson | | 1 | | Giffnock North | Grangemouth | 10 Aug 19 | |
| 622 | 46.28 | | | 46.28 | PB | Giselle Hasler | | 2 | | Holland Sports AC | Crawley | 26 Aug 19 | |
| 623 | 46.3 | | | 46.45/46.3 | PB | Angela McAuslan-Kelly | | 1 | Kathleen Madigan | Aberdeen | Perth | 5 May 19 | |
| 46.45 | | | | | | | | | | Aberdeen | 7 Apr 19 | |
| 623 | 46.3 | | | 46.3 | PB | Emilie Oakden | | 2 | Richard Pilling | Lewes | Eastbourne | 5 Jun 19 | |
| 623 | 46.3 | | | 46.3 | PB | Greta Douthwaite | | 2 | | Herefordshire Schs | Worcester | 8 Jun 19 | |
| 623 | 46.3 | | | 43.67/43.2 | | Charlotte Prince | | 1 | Chrissie Prince | Royal Sutton Coldfield | Banbury | 16 Jun 19 | |
| 623 | 46.3 | | | 46.46/46.3 | PB | Alicia Proctor | | 2 | | Chesterfield | Middlesbrough | 22 Jun 19 | |
| 46.46 | | | | | | | | | | Derby | 13 Jul 19 | |
| 623 | 46.3 | | | 46.3 | PB | Charlotte Sayer | | 1 | | Ipswich | Great Yarmouth | 23 Jun 19 | |
| 623 | 46.3 | | | 46.3 | PB | Annabelle Duggan | | 1 | | Guildford & Godalming | Guildford | 7 Jul 19 | |
| 623 | 46.3 | | | 46.86/46.3 | PB | Kiera-Jayne Atkinson | | 1 | Richard Nation | Chelmsford | Stevenage | 7 Jul 19 | |
| 46.86 | | | | | | | | | | Grays | 15 Sep 19 | |
| 623 | 46.3 | | | 46.3 | PB | Catia Dias | | 2 | | Jersey | St. Clement | 14 Jul 19 | |
| 623 | 46.3 | | | 46.3 | PB | Anna Thompson | | 1 | | Preston | Litherland | 3 Aug 19 | |
| 623 | 46.3 | | | 45.9 | | Keira Paterson-Jewell | | 2 | Daniel Brooker | Brighton & Hove | Brighton | 30 Aug 19 | |
| 623 | 46.3 | | | 46.74/46.3 | PB | Cora O'Brien | | 2 | | Dorchester | Bournemouth | 8 Sep 19 | |
| 46.74 | | | | | | | | | | Exeter | 4 Aug 19 | |
| 635 | 46.33 | | | 46.33 | PB | Amina James | | 2 | | Victoria Park & Tower Hamlets | Battersea | 8 Jun 19 | |
| 636 | 46.34 | | | 46.34 | PB | Emma McNeill | | 1 | David Howells | Middlesbrough (Mandale) | Middlesbrough | 24 Mar 19 | |
| 636 | 46.34 | | | 46.34 | PB | Phoebe Armstrong | | 1 | | Aberdeen | Aberdeen | 28 Apr 19 | |
| 636 | 46.34 | | | 46.34 | PB | Mai Davies | | 1 | John Griffiths | Swansea | Swansea | 29 Jun 19 | |
| 639 | 46.35 | | | 46.35 | PB | Josie Reilly | | 1 | | Giffnock North | Gothenburg, SWE | 30 Jun 19 | |
| 639 | 46.35 | | | 43.12/42.6 | | Holly Watson | | 1 | Stephen Williams | Chelmsford | Southend | 26 Aug 19 | |
| 641 | 46.37 | | | 44.82 | | Jasmine Reed | | 1 | Pete Torrance | Sale Harriers Manchester | Stretford | 6 May 19 | |
| 642 | 46.38 | | | 46.38 | PB | Tierney Walsh | | 2 | Joshua Schofield | City of York | Hull | 14 Apr 19 | |
| 642 | 46.38 | | | 46.35 | | Sarah Mclean | | 2 | | South London | Tooting Bec | 29 Jun 19 | |
| 642 | 46.38 | | | 46.38 | PB | Ciren Campbell | | 2 | | Medway & Maidstone | Tonbridge | 26 Aug 19 | |
| 645 | 46.39 | | | 46.39 | PB | Eden Edwards | | 1 | John Messum | Deeside AAC | Wrexham | 11 May 19 | |
| 645 | 46.39 | | | 44.11 | | Erin Cameron | | 2 | | Livingston | Livingston | 8 Sep 19 | |
| 647 | 46.40 | i | | 46.40i/44.8 | PB | Abi Belward | | 1 | Andrew Fisher | Southampton | Lee Valley | 1 Dec 19 | |
| 648 | 46.4 | | | 44.06/43.8 | | Bethany Connolly | | 1 | | Royal Sutton Coldfield | Stoke | 18 May 19 | |
| 648 | 46.4 | | | 46.4 | PB | Ella Ashley | | 2 | | Warwickshire Schs | Nuneaton | 8 Jun 19 | |
| 648 | 46.4 | | | 45.25 | | Francesca Wattis | | 1 | Colin Pleass | Tamworth | Leamington | 16 Jun 19 | |
| 648 | 46.4 | | | 47.52/46.4 | PB | Niamh Lanckham | | 1 | | Bromsgrove & Redditch | Redditch | 16 Jun 19 | |
| 648 | 46.4 | | | 48.46/46.4 | PB | Caitlin Calvert | | 1 | | City of York | Middlesbrough | 22 Jun 19 | |
| 648 | 46.4 | | | 46.44/46.1 | | Paige Watson | | 1 | | Wakefield | Cleckheaton | 23 Jun 19 | |
| 46.44 | | | | | | | | | | Cudworth | 11 May 19 | |
| 648 | 46.4 | | | 46.4 | PB | Durotimi Bey | | 1 | | Bedfordshire Schs | Chelmsford | 6 Jul 19 | |
| 648 | 46.4 | | | 44.29 | | Rebecca Littler | | 1 | | Rugby & Northampton | Stourport | 7 Jul 19 | |
| 648 | 46.4 | | | 47.68/46.4 | PB | Kate Richardson | | 1 | | Stratford-upon-Avon | Sutton Coldfield | 7 Jul 19 | |
| 648 | 46.4 | | | 48.12/46.4 | PB | Keira Fisher | | 1 | | Bedford & County | Ware | 7 Jul 19 | |
| 648 | 46.4 | | | 46.44/46.4 | PB | Aimee Dickson | | 1 | Cheryl Angell | Team Kennet | Abingdon | 8 Sep 19 | |
| 46.44 | | | | | | | | | | Abingdon | 24 Mar 19 | |
| 659 | 46.41 | i | | 46.41i | PB | Darcy Brown | | 2 | | Falkirk | Emirates Arena | 16 Mar 19 | |
| 659 | 46.41 | | | 46.41 | PB | Taylor Edwards | | 2 | | Sale Harriers Manchester | Stretford | 27 May 19 | |
| 661 | 46.42 | | | 46.42 | PB | Jess Courtney | | 2 | | Exeter | Exeter | 28 May 19 | |
| 662 | 46.44 | | | 40.97 | | Abbi MacLeod | | 1 | | Falkirk | Livingston | 19 Jun 19 | |
| 662 | 46.44 | i | | 46.44i | PB | Maisy Tyrell | | 2 | | Southend | Lee Valley | 1 Dec 19 | |
| 664 | 46.45 | | | 46.45 | PB | Jessica Edwards | | 1 | | Barry & Vale | Swansea | 24 Aug 19 | |
| 664 | 46.45 | | | 46.45 | PB | Robin Greenwood | | 2 | David Ashbourne | Leamington | Leamington | 4 Sep 19 | |
| 666 | 46.46 | | | 46.46 | PB | Amelia Watling | | 2 | Richard Derrick | City of Salisbury | Abingdon | 24 Mar 19 | |
| 666 | 46.46 | | | 46.46 | PB | Jenna Khan | | 2 | | London Schs | Battersea | 8 Jun 19 | |
| 668 | 46.47 | | | 46.47 | PB | Joanna Crulley | | 2 | | North Shields Poly | Hexham | 20 Jul 19 | |
| 668 | 46.47 | | | 44.87 | | Emma Kelly | | 1 | | Motherwell | Grangemouth | 4 Sep 19 | |
| 668 | 46.47 | | | 46.47 | PB | Alexandra Bell-Cobbold | | 1 | | Colchester H | Bedford | 15 Sep 19 | |
| 671 | 46.48 | | | 46.48 | PB | Millie Purchase | | 2 | | Doncaster | Doncaster | 6 Jul 19 | |
| 672 | 46.49 | | | 46.49 | PB | Lenka Addington | | 1 | | Basingstoke & Mid Hants | Portsmouth | 11 May 19 | |
| 673 | 46.50 | | | 42.07 | | Grace MacDonald | | 1 | Nichola Crawford | Inverness | Inverness | 14 Apr 19 | |
| 674 | 46.5 | | | 48.40i/46.0 | | Georgia Pegg | | 1 | Simon Eisenmann | City of Norwich | Norwich | 11 May 19 | |
| 674 | 46.5 | | | 46.84/46.0 | | Naomi Dawson | | 2 | Graham Howell | Yate | Cheltenham | 18 May 19 | |
| 674 | 46.5 | | | 46.80/46.5 | PB | Emily Pearce | | 2 | Robert Hughes | Cannock & Stafford | Leamington | 18 May 19 | |
| 46.80 | | | | | | | | | | Birmingham | 15 Jun 19 | |
| 674 | 46.5 | | | 46.5 | PB | Charis Mogan | | 1 | | Woking | Winchester | 18 May 19 | |
| 674 | 46.5 | | | 48.04/46.5 | PB | Issy Elmes | | 2 | | Nene Valley | Peterborough | 26 May 19 | |
| 674 | 46.5 | | | 49.51/46.5 | PB | Zara Buchanan | | 2 | Martin Phipps | Royal Sutton Coldfield | Wolverhampton | 23 Jun 19 | |
| 674 | 46.5 | | | 46.48 | | Alice Stanley | | 2 | | South London | Guildford | 7 Jul 19 | |
| 674 | 46.5 | | | 46.75i/45.7 | | Alex Holmes | | 2 | | Border | Ashton | 20 Jul 19 | |
| 46.75 | i | | | | | | | | | Sportcity | 10 Mar 19 | |
| 674 | 46.5 | | | 46.73/46.5 | PB | Lily Cassidy | | 2 | Geoffrey Fenwick | Gateshead | Preston | 20 Jul 19 | |
| 674 | 46.5 | | | 46.5 | PB | Maeve Sinfield | | 1 | | Werrington | Peterborough | 4 Aug 19 | |
| 674 | 46.5 | | | 47.45/46.5 | PB | Emily Tucker | | 2 | | Team Kennet | Banbury | 11 Aug 19 | |
| 685 | 46.52 | | | 46.52 | PB | Eve Anderson | | 2 | | Swindon | Swindon | 24 Mar 19 | |
| 686 | 46.53 | | | 43.72 | | Amani Kohler | | 2 | | Highgate | Hendon | 8 Jun 19 | |
| 687 | 46.54 | | | 46.54 | PB | Isabella Cadey | | 1 | | Cleethorpes | Grantham | 11 May 19 | |
| 688 | 46.56 | i | | 45.46i | | Sophie Davies | | 1 | | Cardiff Archers | Cardiff | 27 Jan 19 | |
| 688 | 46.56 | | | 46.56 | PB | Lola-Ren Henderson | | 1 | | Skyrac | Leeds (B) | 8 Jun 19 | |
| 688 | 46.56 | | | 45.41 | | Ava Lenzi | | 1 | | Motherwell | Grangemouth | 4 Sep 19 | |
| 691 | 46.57 | | | 46.57 | PB | Juliette Zeilmaker | | 2 | | Sussex Schs | Crawley | 8 Jun 19 | |
| 691 | 46.57 | | | 46.57 | PB | Maddison Hines | | 2 | | Neath | Cardiff | 6 Jul 19 | |
| 691 | 46.57 | | | 46.57 | PB | Tolani Akinfolarin | | 2 | | Blackheath & Bromley | Crawley | 10 Jul 19 | |
| 694 | 46.58 | | | 46.58 | PB | Grace Williams | | 1 | | Herne Hill | Hornchurch | 18 May 19 | |
| 694 | 46.58 | i | | 46.58i | PB | Yasmin Hadid | | 2 | | Cardiff | Cardiff | 1 Dec 19 | |
| 696 | 46.60 | i | | 46.60i | PB | Lexy Kenhard | | 2 | | Helensburgh | Emirates Arena | 3 Feb 19 | |
| 696 | 46.60 | | | 41.99i | | Rosella Togo | | 2 | Matt Cullen | Bury | Stretford | 6 May 19 | |
| 698 | 46.6 | | | 46.73/46.6 | PB | Kaela Nelson | | 2 | Michael Cottam | Radley | Horspath | 14 Apr 19 | |
| 698 | 46.6 | | | 45.17/44.7 | | Olivia Brown | | 2 | Michael Taylor | Wycombe | Hillingdon | 18 May 19 | |
| 698 | 46.6 | | | 46.6 | PB | Ginny Bruce | | 1 | | Yeovil | Basingstoke | 5 Jun 19 | |
| 698 | 46.6 | | | 46.98/46.6 | PB | Grace Clarke | | 1 | Peter Compton | Forest of Dean AC | Gloucester | 9 Jun 19 | |
| 46.98 | | | | | | | | | | Neath | 23 Jun 19 | |
| 698 | 46.6 | | | 46.6 | PB | Sarah Harrison | | 2 | | London Schs | Ashford | 20 Jun 19 | |
| 698 | 46.6 | | | 46.6 | PB | Kate Weatherill | | 1 | | Wallsend | Gateshead | 22 Jun 19 | |
| 698 | 46.6 | | | 46.88/43.5 | | Naiomi Pye | | 1 | | Middlesbrough (Mandale) | York | 11 Aug 19 | |
| 46.88 | | | | | | | | | | Middlesbrough | 25 Jun 19 | |
| 705 | 46.61 | i | | 46.61i | PB | Polly Woodhouse | | 2 | | Sheffield & Dearne | Sheffield | 17 Mar 19 | |
| 705 | 46.61 | i | | 42.51i | | Erin Lee | | 1 | | Perth Strathtay | Emirates Arena | 1 Dec 19 | |
| 707 | 46.62 | | | 46.62 | PB | Elspeth Watson | | 2 | | Kent Schs | Ashford | 8 Jun 19 | |
| 708 | 46.63 | | | 46.63 | PB | Eluned Goss | | 2 | | Cardiff & The Vale Schs | Cardiff | 22 May 19 | |
| 708 | 46.63 | | | 46.63 | PB | Clementine Houlden | | 1 | David Taylor | Bristol & West | Yate | 23 Jun 19 | |
| 708 | 46.63 | | | 46.63/45.6 | PB | Stevie-Leigh Chatfield-West | | 1 | | Basingstoke & Mid Hants | Basingstoke | 8 Sep 19 | |
| 711 | 46.64 | | | 46.64 | PB | Hannah Forkuoh | | 1 | Chris Franklin | Llanelli | Cardiff | 14 Jul 19 | |
| 712 | 46.70 | | | 46.70 | PB | Erin Lucie Williams | | 1 | | Cardiff Archers | Cardiff Met | 27 Jul 19 | |
| 712 | 46.70 | i | | 46.70i | PB | Blythe Cordwell | | 2 | | Chorley ATC | Sportcity | 1 Dec 19 | |
| 714 | 46.7 | | | 47.05/46.6 | | Milly Unsworth | | 2 | | Cambridge & Coleridge | Peterborough | 5 May 19 | |
| 714 | 46.7 | | | 46.92/46.7 | PB | Heather Cunliffe | | 1 | | Rugby & Northampton | Nottingham | 18 May 19 | |
| 46.92 | | | | | | | | | | Milton Keynes | 23 Jun 19 | |
| 714 | 46.7 | | | 49.31/46.7 | PB | Lily-May Ward | | 2 | | Amber Valley & Erewash | Abingdon | 2 Jun 19 | |
| 714 | 46.7 | | | 46.7 | PB | Lucy Howarth | | 2 | | Witney | Horspath | 9 Jun 19 | |
| 714 | 46.7 | | | 47.05/46.7 | PB | Alice Crosby | | 1 | | City of York | Middlesbrough | 22 Jun 19 | |
| 714 | 46.7 | | | 46.7 | PB | Lily Bunbury | | 2 | | Berkshire Schs | Chelmsford | 6 Jul 19 | |
| 714 | 46.7 | | | 47.04/46.7 | PB | Freya Bradfield | | 2 | | Bournemouth | Bournemouth | 14 Jul 19 | |
| 714 | 46.7 | | | 46.7 | PB | Jessica McLachlan | | 2 | | Solihull & Small Heath | Solihull | 20 Jul 19 | |
| 714 | 46.7 | | | 46.7 | PB | Morwenna Lister | | 1 | Christopher Jeffery | Cornwall AC | Carn Brea | 8 Sep 19 | |
| 723 | 46.72 | i | | 46.72i | PB | Amy Cully | | 2 | | Central | Emirates Arena | 27 Jan 19 | |
| 724 | 46.73 | | | 46.73 | PB | Josie-May Borelly | | 2 | | Ealing Southall & Middx | Parliament Hill | 23 Jun 19 | |
| 724 | 46.73 | | | 46.73 | PB | Emma Vickers | | 2 | | Harborough | Loughborough | 24 Aug 19 | |
| 726 | 46.75 | i | | 46.75i | PB | Madilyn Wilson | | | | Kirkintilloch | Emirates Arena | 7 Feb 19 | |
| 726 | 46.75 | | | 46.75 | PB | Sarah Mitchell | | 2 | | Medway & Maidstone | Woodford | 27 Apr 19 | |
| 726 | 46.75 | i | | 44.00 | | Tia Grover | | 1 | | Sale Harriers Manchester | Sportcity | 1 Dec 19 | |
| 729 | 46.76 | | | 46.76 | PB | Cordelia Goodger | | 2 | | Newport H | Aberdare | 29 Jun 19 | |
| 730 | 46.77 | i | | 46.77i | PB | Cara Mcaneny | | 2 | | East Kilbride | Emirates Arena | 7 Feb 19 | |
| 731 | 46.79 | | | 46.79 | PB | Ava Walsh | | 2 | | Inverness | Aberdeen | 23 Jun 19 | |
| 731 | 46.79 | | | 46.79 | PB | Tia Lomas | | 2 | | Chiltern | Horspath | 17 Jul 19 | |
| 733 | 46.8 | | | 47.09/46.8 | PB | Eve Hood | | 2 | | Colchester H | Peterborough | 14 Apr 19 | |
| 733 | 46.8 | | | 46.8 | PB | Clara Odoch | | 1 | | Havering | Chelmsford | 2 Jun 19 | |
| 733 | 46.8 | | | 46.8 | PB | Gabi Gelderbloom | | | | Corby | Leicester | 8 Jun 19 | |
| 733 | 46.8 | | | 46.8 | PB | Jess Mackenzie | | 2 | | Warwickshire Schs | Nuneaton | 8 Jun 19 | |
| 733 | 46.8 | | | 46.8 | PB | Sophia Lovett-Turner | | 2 | | London Schs | Ashford | 20 Jun 19 | |
| 733 | 46.8 | | | 46.50 | | Ellen Williams | | 2 | Paddy Dinsmore | Wallsend | Hexham | 23 Jun 19 | |
| 733 | 46.8 | | | 51.09/46.8 | PB | Evelyn Mulindwa | | 2 | | Herne Hill | Reading | 23 Jun 19 | |
| 733 | 46.8 | | | 46.87/46.8 | PB | CC Addison | | 1 | | North Devon | Braunton | 30 Jun 19 | |
| 46.87 | | | | | | | | | | Exeter | 4 Aug 19 | |
| 733 | 46.8 | | | 46.42 | | Isla Donaldson | | 2 | | Orkney | Kirkwall | 30 Jun 19 | |
| 733 | 46.8 | | | 47.55/46.4 | | Madison Hill | | 2 | | Braintree | Braintree | 7 Jul 19 | |
| 733 | 46.8 | | | 46.8 | PB | Alice Bates | | 2 | Shane Smith | Kettering | Stourport | 7 Jul 19 | |
| 733 | 46.8 | | | 49.10/46.8 | PB | Kiera Everett | | 1 | | New Forest Junior | Sandown | 14 Jul 19 | |
| 733 | 46.8 | | | 46.8 | PB | Lucia Mosca | | 2 | | Huntingdonshire | Peterborough | 4 Aug 19 | |
| 733 | 46.8 | | | 45.05 | | Abigail Fuller | | 2 | James Webster | Huntingdonshire | Bury St Edmunds | 8 Sep 19 | |
| 747 | 46.82 | i | | 41.95 | | Zoe Smith | | 1 | Kevin Smith | Newark AC | Sheffield | 24 Nov 19 | |
| 748 | 46.83 | | | 46.83 | PB | Bethan Key | | 1 | Luke Morris | Blaenau Gwent | Aberdare | 25 May 19 | |
| 749 | 46.84 | | | 46.02 | | Erin Huddleston | | 2 | | Cookham | Wycombe | 16 Jun 19 | |
| 750 | 46.85 | | | 42.54 | | Bea Oliver-Stevens | | 2 | Lee Farleigh | Exeter | Exeter | 30 Jul 19 | |
| 751 | 46.86 | | | 43.26 | | Kate Gray | | 1 | | City of Plymouth | Plymouth | 28 Apr 19 | |
| 752 | 46.87 | | | 46.87 | PB | Scarlett Taplin | | 2 | | Reading AC | Reading | 12 May 19 | |
| 753 | 46.89 | | | 45.03/44.8 | | Molly White | | 2 | Dean Exton | Dorchester | Exeter | 4 Aug 19 | |
| 754 | 46.9 | | | 46.9 | PB | Annabelle Raymont | | 2 | | Stevenage & North Herts | Peterborough | 14 Apr 19 | |
| 754 | 46.9 | | | 46.9 | PB | Millie Palmer | | 2 | | Suffolk Schs | Ipswich | 2 May 19 | |
| 754 | 46.9 | | | 46.9 | PB | Bo Madden | | 2 | | Cumbria Schs | Barrow | 11 May 19 | |
| 754 | 46.9 | | | 50.22/46.9 | PB | Chloe Minteh | | 1 | | Leeds City | Gateshead | 18 May 19 | |
| 754 | 46.9 | | | 49.95/46.9 | PB | Jessica Phillips | | 2 | | Burton | Stoke | 18 May 19 | |
| 754 | 46.9 | | | 48.51/46.9 | PB | Inka Moyaert | | 2 | | Banbury | Abingdon | 2 Jun 19 | |
| 754 | 46.9 | | | 45.61 | | Anna Douglas | | 1 | | Owls Leicester | Corby | 18 Jun 19 | |
| 754 | 46.9 | | | 46.9 | PB | Stevie-Jo McIntosh | | 1 | | Greater Manchester Schs | Blackpool | 19 Jun 19 | |
| 754 | 46.9 | | | 46.9 | PB | Katie Glasspoole | | 2 | Derek Warn | Southampton | Brighton | 23 Jun 19 | |
| 754 | 46.9 | | | 47.79/46.9 | PB | Scarlett Rodia | | 2 | | Swindon | Horspath | 30 Jun 19 | |
| 754 | 46.9 | | | 44.01 | | Annabel Hedge | | 1 | | St. Albans AC | Ware | 7 Jul 19 | |
| 754 | 46.9 | | | 43.16 | | Katie Grafton | | 2 | Wendy Andrews | East Cheshire | Macclesfield | 20 Jul 19 | |
| 754 | 46.9 | | | 45.84i | | Megan Barnes | | 2 | | Edinburgh AC | Grangemouth | 24 Aug 19 | |
| 767 | 46.91 | | | 45.07 | | Tanis Merron | | 2 | | Loughview AC | Bangor | 9 Apr 19 | |
| 768 | 46.94 | | | 46.94 | PB | Gabriella Umoetuk | | 2 | | Belgrave | Battersea | 22 Jun 19 | |
| 768 | 46.94 | | | 46.94 | PB | Alejandra Alonso | | 2 | | Medway & Maidstone | Gillingham | 22 Jun 19 | |
| 768 | 46.94 | i | | 42.99i | | Nia Parry | | 1 | | Newport H | Cardiff | 1 Dec 19 | |
| 771 | 46.95 | i | | 46.95i | PB | Hayley Penman | | 2 | | Dunfermline Track & Field | Emirates Arena | 16 Mar 19 | |
| 771 | 46.95 | | | 46.95 | PB | Mollie Sage | | 2 | Darryn McAtee | Newport H | Aberdare | 29 Jun 19 | |
| 771 | 46.95 | | | 46.95 | PB | Ciara Doherty | | 2 | Grant Taylor | Rugby & Northampton | Yate | 20 Jul 19 | |
| 774 | 46.96 | | | 46.96 | PB | Renae Hall | | 2 | Richard Claessens | Wycombe | Wycombe | 16 Jun 19 | |
| 775 | 47.00 | | | 47.00 | PB | Kiana Ustabasi | | 1 | | Altrincham | Stretford | 27 May 19 | |
| 775 | 47.00 | i | | 43.15 | | Daisy Kaye | | 1 | Joe McColgan | Amber Valley & Erewash | Sheffield | 24 Nov 19 | |
| 777 | 47.0 | | | 46.33/45.6 | | Freya Bonell | | 2 | | Cornwall AC | Par | 6 Apr 19 | |
| 777 | 47.0 | | | 46.6 | | Jade Griscti | | 2 | Phill Morris | Independent Intelligent Fitness | Southampton | 20 Apr 19 | |
| 777 | 47.0 | | | 44.5 | | Catherine Perry | | 2 | | Northern (Isle of Man) | Blackpool | 11 May 19 | |
| 777 | 47.0 | | | 47.0 | PB | Nicole Ritchie | | 1 | | Annan | Carlisle | 25 May 19 | |
| 777 | 47.0 | | | 47.0 | PB | Tanaya Ghosh | | 1 | | Westbury | Gloucester | 9 Jun 19 | |
| 777 | 47.0 | | | 47.0 | PB | Dear Huusfeldt | | 1 | | Essex Schs | Chelmsford | 6 Jul 19 | |
| 777 | 47.0 | | | 47.44/47.0 | PB | Madeline Barker | | 2 | | Havering | Braintree | 7 Jul 19 | |
| 777 | 47.0 | | | 47.12/47.0 | PB | Abigail Stafford | | 2 | | Epsom & Ewell | Guildford | 7 Jul 19 | |
| 777 | 47.0 | | | 47.0 | PB | Josie Banks | | 2 | | Guildford & Godalming | Guildford | 20 Jul 19 | |
| 777 | 47.0 | | | 47.0 | PB | Lalita O'Mahoney | | 1 | | Guildford & Godalming | Guildford | 20 Jul 19 | |