| 300 Women Overall 2012 to 44.0 | Head to Head Top 10 |
| Rank | Perf | | | PB | | Name | | Year | Coach | Club | Venue | Date | |
| 1 | 38.43 | | | 38.43 | PB | Sabrina Bakare | U17 | -7 | Jane Dixon | Shaftesbury Barnet | Olympic Park | 9 May 12 |  |
| 2 | 38.59 | | | 37.59 | | Cheriece Hylton | U17 | -7 | John Blackie | Blackheath & Bromley | Ashford | 21 Jul 12 | |
| 3 | 39.15 | | | 39.15 | PB | Shona Richards | U17 | -6 | Marina Armstrong | Epsom & Ewell | Bedford | 19 Aug 12 | |
| 4 | 39.2 | | | 39.22/39.2 | PB | Rachel Norris | U17 | -8 | Martin White | Mansfield | Corby | 17 Jun 12 | |
| 40.46 | i | | | | | | | | | Sheffield | 8 Dec 12 | |
| 5 | 39.47 | | | 38.66 | | Kelsey Stewart | U17 | -8 | Ken Hogg | Banchory Stonehaven | Grangemouth | 8 Jun 12 | |
| 6 | 39.68 | | | 39.68 | PB | Beth Sargent | U17 | -6 | Glyn Davies | Wrexham | Ashford | 21 Jul 12 | |
| 6 | 39.68 | i# | | 39.68i | PB | Ese Okoro | U23 | -1 | Lloyd Cowan | Birchfield H | Ames IA, USA | 7 Dec 12 | |
| 8 | 39.7 | | | 40.91/39.7 | PB | Alice Kaye | U20 | -5 | | Scunthorpe & District AC (Defunct) | Scunthorpe | 25 Mar 12 | |
| 8 | 39.7 | | | 38.19i | | Hannah Brier | U15 | -9 | Neal Merry | Swansea | Swansea | 24 Jun 12 | |
| 10 | 39.74 | | | 39.36 | | Loren Bleaken | U17 | -6 | Adrian Clover | Team Bath | Exeter | 15 Jul 12 | |
| 11 | 39.76 | i | | 39.76i | PB | Amy Hillyard | U17 | -6 | Trevor Marsay | Birchfield H | Birmingham | 26 Feb 12 | |
| 39.85 | | | | | | | | | | Gateshead | 7 Jul 12 | |
| 40.3 | | | | | | | | | | Coventry | 17 Jun 12 | |
| 12 | 40.0 | | | 39.3 | | Jessica Turner | U20 | -6 | Julie Feeney | Amber Valley & Erewash | Rugby | 10 Jun 12 | |
| 12 | 40.0 | | | 40.09/40.0 | PB | Alice Mansfield | U17 | -6 | Stephen Carroll | Liverpool H | Bebington | 16 Jun 12 | |
| 40.09 | | | | | | | | | | Olympic Park | 9 May 12 | |
| 14 | 40.06 | | | 40.06 | PB | Rachel Osei-Tutu | U17 | -6 | Paul Nash | Wycombe | Gateshead | 7 Jul 12 | |
| 15 | 40.1 | | | 41.40/40.1 | PB | Kaylee Dodd | U17 | -6 | Jacqui Childs | Basildon | Basildon | 10 Jun 12 | |
| 16 | 40.13 | | | 39.40/38.9 | | Nicole McKechnie | U17 | -7 | Steve Mitchell | Chelmsford | Bedford | 19 Aug 12 | |
| 17 | 40.15 | i | | 39.81i | | Nikita Campbell-Smith | U17 | -6 | Sharon Morris | Birchfield H | Birmingham | 5 Feb 12 | |
| 40.9 | | | | | | | | | | Stoke | 29 Jul 12 | |
| 18 | 40.24 | | | 40.05 | | Matilda Rainsborough | U17 | -7 | Alli Crossman | Guildford & Godalming | Gateshead | 6 Jul 12 | |
| 19 | 40.4 | | | 40.25 | | Selina Henderson | U15 | -9 | John Dawson | Falkirk | Grangemouth | 15 Sep 12 | |
| 20 | 40.42 | i | | 40.42i | PB | Jennifer Clayton | U23 | -2 | | Sale Harriers Manchester | Sportcity | 2 Dec 12 | |
| 21 | 40.49 | | | 40.35 | | Olivia Caesar | U17 | -7 | Alan Hewson | Windsor Slough Eton & Hounslow | Sportcity | 2 Sep 12 | |
| 22 | 40.50 | | | 40.50 | PB | Alyssia Carr | U17 | -7 | Roger Devlin | Sale Harriers Manchester | Bedford | 19 Aug 12 | |
| 23 | 40.53 | | | 40.53/40.3 | PB | Charlotte Cayton-Smith | U17 | -8 | Peter Meredith | Newquay & Par | Exeter | 15 Jul 12 | |
| 24 | 40.62 | | | 40.62 | PB | Emily Jenkinson | U17 | -7 | Todd Bennett | Southampton | Portsmouth | 12 May 12 | |
| 25 | 40.65 | | | 40.65 | PB | Polly Hopper | U17 | -7 | Andy Forman | Isle of Wight | Portsmouth | 12 May 12 | |
| 25 | 40.65 | i | | 40.65i | PB | Natalie DeRatt | | 2 | Brad de Weese | City of Sheffield | Winston-Salem NC, USA | 1 Dec 12 | |
| 25 | 40.65 | i | | 39.10 | | Caryl Moore | | 1 | Darrell Maynard | Swansea | Cardiff | 8 Dec 12 | |
| 28 | 40.68 | | | 40.68 | PB | Shayone Simao | | 4 | Donovan Reid | Blackheath & Bromley | Woodford | 21 Apr 12 | |
| 29 | 40.7 | | | 40.87i/40.7 | PB | Beth Bolton | U17 | -6 | Roger Devlin | Sale Harriers Manchester | Bebington | 20 May 12 | |
| 40.87 | i | | | | | | | | | Birmingham | 26 Feb 12 | |
| 29 | 40.7 | | | 41.68i/40.7 | PB | Georgina Rogers | U17 | -7 | | Birchfield H | Coventry | 17 Jun 12 | |
| 41.68 | i | | | | | | | | | Birmingham | 19 Feb 12 | |
| 41.80 | | | | | | | | | | Sportcity | 2 Sep 12 | |
| 29 | 40.7 | | | 39.69 | | Gabrielle George | U17 | -8 | Roger Devlin | Sale Harriers Manchester | Sportcity | 17 Jun 12 | |
| 41.03 | | | | | | | | | | Sportcity | 2 Sep 12 | |
| 32 | 40.80 | | | 40.80 | PB | Miranda Hardacre | U17 | -6 | Paul Batten | Erme Valley | Exeter | 13 May 12 | |
| 33 | 40.8 | | | 40.4 | | Rachael Smith | | 6 | Todd Bennett | Southampton | Southampton | 25 Apr 12 | |
| 33 | 40.8 | | | 41.01/40.7 | | Molly Long | U17 | -7 | John Knowles | Bristol & West | Carn Brea | 12 May 12 | |
| 41.01 | | | | | | | | | | Exeter | 23 Jun 12 | |
| 35 | 40.88 | | | 40.88 | PB | Mhairi Hendry | U17 | -7 | | Shettleston | Grangemouth | 8 Jun 12 | |
| 36 | 40.9 | | | 40.9 | PB | Georgie Hartigan | U17 | -7 | Norma Pugh | Coventry | Coventry | 17 Jun 12 | |
| 37 | 40.99 | | | 39.40 | | Roseanna McGuckian | U17 | -8 | Phil Snoddy | City of Lisburn | Antrim | 7 Jul 12 | |
| 38 | 41.0 | | | 41.27/41.0 | PB | Jane Angus | U17 | -7 | Martin Brockman | Medway & Maidstone | Sutton Valence | 6 May 12 | |
| 41.27 | | | | | | | | | | Gateshead | 6 Jul 12 | |
| 38 | 41.0 | | | 42.28i/41.0 | PB | Niamh Bailey | U20 | -6 | Matthew Peleszok | Kettering | Kettering | 21 Jul 12 | |
| 40 | 41.10 | i | | 38.66i | | Abigayle Fitzpatrick | U20 | -4 | | Sale Harriers Manchester | Sportcity | 2 Dec 12 | |
| 41 | 41.1 | | | 39.87 | | Phoebe White | U15 | -9 | | Solihull & Small Heath | Banbury | 21 Jul 12 | |
| 41.17 | | | | | | | | | | Leicester | 14 Jul 12 | |
| 41 | 41.1 | i | | 41.1i | PB | Alicia Barrett | U17 | -9 | Daniel Duke | Chesterfield | Sheffield | 24 Nov 12 | |
| 43 | 41.2 | | | 41.2 | PB | Abbie Hetherington | U17 | -6 | Frank Davidson | Carlisle Aspatria | Carlisle | 12 May 12 | |
| 43 | 41.2 | | | 41.57/41.2 | PB | Eleanor Smith-Hahn | U17 | -7 | Paul Weston | Croydon | Croydon | 20 May 12 | |
| 41.57 | | | | | | | | | | Sportcity | 1 Sep 12 | |
| 43 | 41.2 | | | 38.93 | | Holly Gregory | U17 | -6 | Allan Williams | Brighton & Hove | Eastbourne | 17 Jun 12 | |
| 41.70 | i | | | | | | | | | Lee Valley | 4 Feb 12 | |
| 42.00 | | | | | | | | | | Crawley | 8 Apr 12 | |
| 46 | 41.21 | | | 40.32 | | Melissa Roberts | U17 | -8 | | Cwmbran | Cardiff | 14 Jul 12 | |
| 46 | 41.21 | | | 36.86 | | Finette Agyapong | U17 | -8 | Coral Nourrice | Newham & Essex Beagles | Watford | 15 Jul 12 | |
| 48 | 41.3 | | | 41.85/41.3 | PB | Stephanie O'Connor | U17 | -7 | David Harmes | Scunthorpe & District AC (Defunct) | York | 23 Jun 12 | |
| 41.85 | | | | | | | | | | Hull | 14 Jul 12 | |
| 49 | 41.35 | | | 41.35 | PB | Katie-Jane Priest | U17 | -7 | Elwyn Jarrett | Newport H | Swansea | 10 Jun 12 | |
| 49 | 41.35 | | | 41.35 | PB | Jemma Eyre | U17 | -8 | | Warrington AC | Hull | 14 Jul 12 | |
| 51 | 41.36 | | | 41.36 | PB | Emma Wortley | U17 | -7 | David Wilkinson | Middlesbrough (Mandale) | Gateshead | 6 Jul 12 | |
| 52 | 41.37 | i | | 40.69i | | Georgie Ivens | U20 | -4 | Ken Maggs | Nene Valley | Sheffield | 8 Dec 12 | |
| 53 | 41.4 | | | 41.41/41.4 | PB | Leah Millard | U17 | -8 | Karen Buck | City of York | York | 23 Jun 12 | |
| 41.41 | | | | | | | | | | Hull | 14 Jul 12 | |
| 54 | 41.41 | | | 41.24/41.2 | | Eleanor Proud | U17 | -7 | Shaun Ainge | Cannock & Stafford | Gateshead | 6 Jul 12 | |
| 55 | 41.43 | i | | 41.27/41.1 | | Sally Wareing | U17 | -6 | | Southport Waterloo | Birmingham | 25 Feb 12 | |
| 41.8 | | | | | | | | | | Bebington | 16 Jun 12 | |
| 42.45 | | | | | | | | | | Liverpool | 12 May 12 | |
| 55 | 41.43 | | | 40.41 | | Dayna Willoughby | U17 | -7 | | Gloucester | Leicester | 14 Jul 12 | |
| 57 | 41.49 | | | 36.53i | | Lina Nielsen | U17 | -7 | Frank Adams | Enfield & Haringey | Hendon | 29 Jul 12 | |
| 58 | 41.5 | | | 36.97i | | Laviai Nielsen | U17 | -7 | | Enfield & Haringey | Lee Valley | 8 Jul 12 | |
| 42.41 | | | | | | | | | | Hendon | 29 Jul 12 | |
| 58 | 41.5 | i | | 38.65 | | Ella Barrett | U17 | -9 | Daniel Duke | Chesterfield | Sheffield | 24 Nov 12 | |
| 60 | 41.52 | | | 41.52 | PB | Evie Semple | U17 | -8 | Kenny Morrison | Inverclyde | Ashford | 21 Jul 12 | |
| 61 | 41.56 | i# | | 41.56i | PB | Nicole Burlinson | U20 | -4 | | Darlington H | Kent OH, USA | 7 Dec 12 | |
| 62 | 41.57 | i | | 41.57i | PB | Abigail Backshall | U17 | -8 | Philip Oliver | Colwyn Bay | Cardiff | 5 Feb 12 | |
| 41.83 | | | | | | | | | | Olympic Park | 9 May 12 | |
| 42.3 | | | | | | | | | | Leigh | 20 May 12 | |
| 62 | 41.57 | i | | 41.57i | PB | Megan Barrett | U17 | -7 | David Warner | Cheltenham | Birmingham | 11 Feb 12 | |
| 42.0 | | | | | | | | | | Yate | 6 May 12 | |
| 62 | 41.57 | | | 41.48 | | Lily Beckford | U17 | -8 | Christine Harrison-Bloomfield | London Heathside | Mile End | 12 May 12 | |
| 65 | 41.58 | | | 41.58 | PB | Emily Pursehouse | U17 | -7 | | Diss | Watford | 15 Jul 12 | |
| 66 | 41.60 | | | 40.79/40.7 | | Kate Lawler | U17 | -8 | David Titterington | Blackpool, Wyre & Fylde | Hull | 14 Jul 12 | |
| 67 | 41.6 | | | 41.77/41.4 | | Katie Geddes | U17 | -6 | Nicholas Brown | Team Bath | Marlborough | 27 May 12 | |
| 41.77 | | | | | | | | | | Exeter | 23 Jun 12 | |
| 68 | 41.65 | | | 41.65 | PB | Lara Durrani | U17 | -6 | Helen Patricia James | Cardiff | Cardiff | 2 Jun 12 | |
| 69 | 41.67 | | | 41.67 | PB | Lucy Hammett | U17 | -6 | Wynford Leyshon | Swansea | Ashford | 21 Jul 12 | |
| 70 | 41.7 | | | 42.12/41.7 | PB | Isobel Billau | U20 | -5 | Sam Cater | Bromsgrove & Redditch | Bromsgrove | 10 Jun 12 | |
| 70 | 41.7 | | | 40.48/39.7 | | Chloe McCarthy | U15 | -9 | Tim Higman | St. Albans AC | Peterborough | 27 Aug 12 | |
| 72 | 41.72 | | | 40.97 | | Jessie Concannon | U17 | -7 | Angela Sharp | Dunfermline & West Fife (Defunct) | Grangemouth | 8 Jun 12 | |
| 72 | 41.72 | | | 41.72 | PB | Eliza Reid | U17 | -7 | Simon Byrne | Team Bath | Yate | 2 Sep 12 | |
| 74 | 41.73 | | | 40.70 | | Chloe Hollamby | U17 | -8 | | East Grinstead | Crawley | 27 Aug 12 | |
| 75 | 41.76 | | | 41.76 | PB | Amy Greenway | U17 | -7 | Carl Pinder | Radley | Abingdon | 31 Mar 12 | |
| 76 | 41.8 | | | 42.85/41.8 | PB | Rochelle Munroe-Graham | U17 | -7 | Ron Roddan | Thames Valley | Wormwood Scrubs | 20 May 12 | |
| 76 | 41.8 | | | 41.81i/41.8 | PB | Mary Martin | U17 | -8 | | Enfield & Haringey | Hemel Hempstead | 16 Jun 12 | |
| 41.92 | | | | | | | | | | Mile End | 12 May 12 | |
| 76 | 41.8 | i | | 40.47i | | Freya Bradshaw | U20 | -6 | David Harmes | Scunthorpe & District AC (Defunct) | Sheffield | 24 Nov 12 | |
| 42.5 | | | | | | | | | | Scunthorpe | 25 Mar 12 | |
| 79 | 41.83 | | | 41.83 | PB | Hannah Jones | U17 | -6 | Paul Waters | Wirral | Hull | 14 Jul 12 | |
| 80 | 41.86 | i | | 41.06 | | Sarah Glenny | U20 | -5 | William Parker | Kilbarchan | Glasgow | 9 Feb 12 | |
| 80 | 41.86 | i | | 39.49 | | Ashton Greenwood | U15 | -10 | Stuart Hall | Spenborough | Sportcity | 2 Dec 12 | |
| 82 | 41.9 | | | 42.87/41.9 | PB | Poppy Willis | U17 | -7 | Zoe Bowen | Horsham Blue Star | Crawley | 12 May 12 | |
| 42.87 | | | | | | | | | | Crawley | 8 Apr 12 | |
| 82 | 41.9 | | | 41.9 | PB | Ellie Rayer | U17 | -7 | Eldon Lake | Windsor Slough Eton & Hounslow | Reading | 20 May 12 | |
| 82 | 41.9 | | | 39.51 | | Emily Borthwick | U15 | -8 | Julie Meadows | Wigan & District | Preston | 11 Aug 12 | |
| 82 | 41.9 | | | 42.09/41.9 | PB | Kirsty Fraser | U17 | -6 | Andy Bibby | Preston | Blackpool | 25 Aug 12 | |
| 42.09 | | | | | | | | | | Hull | 14 Jul 12 | |
| 86 | 41.95 | | | 41.95 | PB | Rebecca Croft | U17 | -8 | Conrad Milton | Windsor Slough Eton & Hounslow | Horspath | 12 May 12 | |
| 86 | 41.95 | i | | 40.81i | | Eleanor Rawson | U17 | -8 | | City of Sheffield | Sheffield | 8 Dec 12 | |
| 88 | 41.99 | | | 41.99 | PB | Eliza Kelsey-Richards | U17 | -8 | Tristan Jamieson | Oxford Brookes Uni | Castellón, ESP | 30 Jun 12 | |
| 89 | 42.0 | | | 42.15/42.0 | PB | Alona-Mae Lonsdale | U17 | -7 | | Gateshead | Scunthorpe | 25 Mar 12 | |
| 42.15 | | | | | | | | | | Olympic Park | 9 May 12 | |
| 89 | 42.0 | | | 41.63 | | Emma Piatek | U17 | -8 | | Swindon | Tidworth | 13 May 12 | |
| 42.84 | | | | | | | | | | Bracknell | 31 Mar 12 | |
| 89 | 42.0 | | | 42.0 | PB | Sophie Billington | U17 | -6 | Catrina Lewis | Luton | Luton | 20 May 12 | |
| 89 | 42.0 | | | 42.0 | PB | Tayla Humm | U17 | -7 | | Havering | Lee Valley | 10 Jun 12 | |
| 89 | 42.0 | | | 42.92i/42.0 | PB | Christy Dailly | U17 | -8 | Christian Dailly | Chelmsford | Lee Valley | 10 Jun 12 | |
| 42.96 | | | | | | | | | | Chelmsford | 13 May 12 | |
| 89 | 42.0 | | | 42.37/42.0 | PB | Tasha Stone | U17 | -8 | Alan Morris | City of Stoke | Stoke | 29 Jul 12 | |
| 42.37 | | | | | | | | | | Loughborough | 19 Aug 12 | |
| 89 | 42.0 | | | 41.71i | | Lauren Shaw | U17 | -8 | Ken Spencer | Bracknell AC | Eton | 16 Sep 12 | |
| 43.07 | | | | | | | | | | Basingstoke | 18 Jul 12 | |
| 89 | 42.0 | | | 41.1 | | Isobel Ives | U15 | -9 | Jacqui Childs | Basildon | Stevenage | 16 Sep 12 | |
| 97 | 42.01 | i | | 42.01i | PB | Ashley Helsby | U23 | -1 | Toni Minichiello | Liverpool H | Sheffield | 8 Dec 12 | |
| 98 | 42.02 | | | 42.02 | PB | Zoe Kerins | U17 | -6 | Christopher Bedford | Wakefield | Hull | 14 Jul 12 | |
| 99 | 42.05 | | | 41.42 | | Rosa Prideaux | U15 | -8 | Christian Dailly | Chelmsford | Chelmsford | 7 Apr 12 | |
| 99 | 42.05 | | | 41.46i | | Rachel Highfield | U17 | -7 | Bruce Horsburgh | Gateshead | Middlesbrough | 15 Apr 12 | |
| 101 | 42.09 | | | 42.09 | PB | Lucy Spray | | 2 | | Bedford & County | Florence, ITA | 15 Apr 12 | |
| 102 | 42.1 | | | 44.26/42.1 | PB | Sophie Spinner | U17 | -7 | Kim Milnthorpe | Horsham Blue Star | Crawley | 12 May 12 | |
| 102 | 42.1 | | | 42.23/42.1 | PB | Tayla Benson | U17 | -7 | Adrian Brown | | Bracknell | 27 May 12 | |
| 42.23 | | | | | | | | | | Bracknell | 31 Mar 12 | |
| 102 | 42.1 | | | 41.61 | | Amy Kelland | U17 | -7 | Lee Ness | City of Salisbury | Salisbury | 16 Jun 12 | |
| 42.27 | | | | | | | | | | Andover | 4 Jun 12 | |
| 105 | 42.11 | | | 42.11 | PB | Jess Strang | U17 | -8 | Stephen Endacott | City of Plymouth | Exeter | 13 May 12 | |
| 106 | 42.12 | | | 42.12 | PB | Megan Bishop | U17 | -7 | David Warner | Cheltenham | Cardiff | 17 Jun 12 | |
| 107 | 42.14 | | | 42.14 | PB | Rebecca Miles | U17 | -7 | Charles Hailstone | Hillingdon | Bracknell | 31 Mar 12 | |
| 108 | 42.17 | | | 42.17 | PB | Julia Cook | U17 | -8 | Jamie Osborn | Swindon | Basingstoke | 18 Jul 12 | |
| 109 | 42.19 | i | | 42.19i | PB | Katherine Endacott | | 10 | Stephen Endacott | City of Plymouth | Cardiff | 8 Dec 12 | |
| 110 | 42.2 | | | 41.35 | | Rebecca O'Hara | U15 | -9 | | Tonbridge | Bromley | 4 Jun 12 | |
| 110 | 42.2 | | | 42.2 | PB | Francesca Ashworth | U17 | -8 | Shane Smith | Kettering | Bromsgrove | 10 Jun 12 | |
| 110 | 42.2 | | | 42.41i/42.2 | PB | Lizzie Clifford | U17 | -6 | Lee Ness | City of Salisbury | Swindon | 1 Jul 12 | |
| 42.41 | i | | | | | | | | | Birmingham | 11 Feb 12 | |
| 43.33 | | | | | | | | | | Birmingham | 22 Apr 12 | |
| 110 | 42.2 | | | 42.52i/42.0 | | Emma Clarke | U17 | -8 | Tim Higman | St. Albans AC | Stevenage | 8 Jul 12 | |
| 42.91 | | | | | | | | | | Bedford | 18 Aug 12 | |
| 114 | 42.21 | i | | 39.90 | | Mhairi Patience | U17 | -6 | Colin Sinclair | Victoria Park City of Glasgow | Glasgow | 9 Feb 12 | |
| 114 | 42.21 | | | 42.21 | PB | Isabel Hughes | U17 | -7 | Adrian Thomas | Bridgend | Cardiff | 14 Jul 12 | |
| 116 | 42.24 | | | 42.24 | PB | Hannah Taylor | U17 | -7 | Paul Bearman | Stratford-upon-Avon | Horspath | 6 May 12 | |
| 117 | 42.25 | | | 41.36 | | Hannah Cameron | U17 | -8 | | Edinburgh AC | Sportcity | 2 Sep 12 | |
| 118 | 42.26 | i | | 42.00/41.5 | | Kay Oakley | U17 | -6 | John Abbiss | Wolverhampton & Bilston | Birmingham | 25 Feb 12 | |
| 42.4 | | | | | | | | | | Coventry | 6 May 12 | |
| 42.74 | | | | | | | | | | Birmingham | 22 Apr 12 | |
| 119 | 42.3 | | | 38.36 | | Lauren Russell | U15 | -9 | Coral Nourrice | Bedford & County | Basildon | 10 Jun 12 | |
| 119 | 42.3 | | | 42.3 | PB | Natasha Clowes | U17 | -7 | | City of Stoke | Coventry | 17 Jun 12 | |
| 119 | 42.3 | | | 42.84/42.3 | PB | Rhian Williams | U17 | -7 | Tania Williams | Deeside AAC | Warrington | 17 Jun 12 | |
| 42.84 | | | | | | | | | | Connah's Quay | 22 Apr 12 | |
| 122 | 42.35 | | | 42.35 | PB | Ciara Armstrong | U17 | -7 | | City of Derry | Olympic Park | 9 May 12 | |
| 123 | 42.37 | | | 42.37 | PB | Simi Fajemisin | U15 | -8 | Eldon Lake | Oxford City | Horspath | 12 May 12 | |
| 123 | 42.37 | | | 42.37 | PB | Rose Hairs | U17 | -7 | David Hull | Tonbridge | Hendon | 29 Jul 12 | |
| 125 | 42.4 | | | 41.50 | | Polly Davies | U20 | -5 | Alan Jones | Great Yarmouth | Great Yarmouth | 12 Apr 12 | |
| 125 | 42.4 | | | 42.76i/42.4 | PB | Tawana Gardner | U17 | -8 | | Sale Harriers Manchester | Blackburn | 6 May 12 | |
| 42.76 | i | | | | | | | | | Sportcity | 4 Mar 12 | |
| 125 | 42.4 | | | 42.97/42.4 | PB | Ellie Edwards | U17 | -7 | Tom Cullen | Trafford | Warrington | 12 May 12 | |
| 125 | 42.4 | | | 42.85/42.4 | PB | Caelidh Ross | U17 | -8 | | Mansfield | Mansfield | 20 May 12 | |
| 43.10 | | | | | | | | | | Loughborough | 15 Apr 12 | |
| 125 | 42.4 | | | 43.80/42.4 | PB | Zoe Steele | U15 | -10 | | Bedford & County | Bedford | 8 Jul 12 | |
| 125 | 42.4 | | | 43.96/42.4 | PB | Jodie Leslie | U20 | -4 | | Dartford H | Dartford | 22 Aug 12 | |
| 125 | 42.4 | | | 40.52 | | Sarah Kearsey | U20 | -5 | | Bournemouth | Exeter | 21 Nov 12 | |
| 132 | 42.46 | | | 42.46 | PB | Naomi Orogun | U17 | -8 | Alan Champion | Dartford H | Kingston | 23 Jun 12 | |
| 133 | 42.48 | | | 40.76 | | Zoe Nash | U15 | -9 | Jason Michael Quirke | Bridgend | Yate | 2 Sep 12 | |
| 134 | 42.49 | | | 42.49 | PB | Rachael Scott | U17 | -7 | | Preston | Sportcity | 2 Sep 12 | |
| 135 | 42.50 | i | | 42.50i | PB | Julie Dobbin | U20 | -5 | | Law | Glasgow | 9 Feb 12 | |
| 135 | 42.50 | | | 42.50 | PB | Paige Dickson | U17 | -7 | | Victoria Park City of Glasgow | Edinburgh | 5 Aug 12 | |
| 137 | 42.5 | | | 42.5 | PB | Shan Preece | U17 | -7 | | City of Stoke | Coventry | 6 May 12 | |
| 137 | 42.5 | | | 43.53/42.5 | PB | Katie Purves | U17 | -7 | Brian Winning | Lasswade | Wishaw | 6 May 12 | |
| 43.58 | | | | | | | | | | Edinburgh | 23 Sep 12 | |
| 137 | 42.5 | | | 42.58/42.5 | PB | Robyn Foster | U17 | -7 | Martin White | Mansfield | Nottingham | 13 May 12 | |
| 42.58 | | | | | | | | | | Gateshead | 6 Jul 12 | |
| 137 | 42.5 | | | 41.44 | | Keeleigh Chapman | U17 | -7 | Howard Moscrop | Swindon | Tidworth | 13 May 12 | |
| 42.61 | i | | | | | | | | | Birmingham | 11 Feb 12 | |
| 42.85 | | | | | | | | | | Horspath | 6 May 12 | |
| 137 | 42.5 | | | 42.5 | PB | Nicole Reynolds | U20 | -6 | | Tamworth | Bromsgrove | 10 Jun 12 | |
| 137 | 42.5 | | | 44.13i/42.5 | PB | Hannah Sharkey | U17 | -7 | | Halesowen | Coventry | 17 Jun 12 | |
| 137 | 42.5 | | | 41.87 | | Kaitlin Howard | U17 | -8 | | Woking | Guildford | 17 Jun 12 | |
| 43.04 | | | | | | | | | | Kingston | 16 Jun 12 | |
| 137 | 42.5 | | | 42.5 | PB | Katie Matthews | U17 | -6 | | Crewe & Nantwich | Sportcity | 17 Jun 12 | |
| 137 | 42.5 | | | 42.77/42.5 | PB | Kayanna Reid | U17 | -8 | Craig Andrew | Luton | Chelmsford | 8 Jul 12 | |
| 42.77 | | | | | | | | | | Bedford | 18 Aug 12 | |
| 137 | 42.5 | | | 42.5 | PB | Olivia Parrott | U17 | -7 | Masimba Musa | Aldershot, Farnham & District | Guildford | 8 Jul 12 | |
| 137 | 42.5 | | | 42.92/42.5 | PB | Jodi Beynon | U15 | -9 | David Norton | Blaenau Gwent | Cwmbran | 28 Jul 12 | |
| 42.92 | | | | | | | | | | Newport | 23 Jun 12 | |
| 137 | 42.5 | | | 43.96/42.5 | PB | Keeley Whitlock | U17 | -7 | | Ipswich | Stevenage | 16 Sep 12 | |
| 43.96 | | | | | | | | | | Peterborough | 23 Jun 12 | |
| 149 | 42.56 | | | 41.14 | | Christina Brend | U15 | -9 | Gill St Barbe | North Devon | Exeter | 15 Jul 12 | |
| 150 | 42.57 | | | 42.57 | PB | Sophie Woollin | U17 | -7 | Christopher Neil Mitchell | Wakefield | Hull | 14 Jul 12 | |
| 151 | 42.58 | | | 42.58 | PB | Rosie Wilson | U17 | -8 | | Edinburgh AC | Edinburgh | 5 Aug 12 | |
| 151 | 42.58 | | | 42.58 | PB | Tania Wilson | U17 | -7 | | Seaton | Gateshead | 25 Aug 12 | |
| 153 | 42.59 | | | 42.39 | | Charlotte Kessell | U17 | -7 | Rick Betts | Middlesbrough (Mandale) | Gateshead | 25 Aug 12 | |
| 153 | 42.59 | i | | 42.59i | PB | Abbey Stanley | U20 | -5 | | Rotherham | Sheffield | 8 Dec 12 | |
| 155 | 42.60 | i | | 42.60i | PB | Bethany Ibbotson | U17 | -8 | Upali Ukwatte Kankanamage | Colchester & Tendring | Lee Valley | 11 Feb 12 | |
| 43.44 | | | | | | | | | | Chelmsford | 13 May 12 | |
| 43.5 | | | | | | | | | | Braintree | 22 Apr 12 | |
| 156 | 42.6 | | | 43.34i/42.6 | PB | Laura Goodwin | U17 | -7 | Jamie Russell | City of Sheffield | Preston | 6 May 12 | |
| 156 | 42.6 | | | 42.6 | PB | Jess O'Neill | U15 | -9 | David Titterington | Blackpool, Wyre & Fylde | Blackpool | 12 May 12 | |
| 156 | 42.6 | | | 43.27/42.5 | | Lurenda Mudd | U17 | -6 | Paul Pepler | Gloucester | Cheltenham | 13 May 12 | |
| 156 | 42.6 | | | 43.97i/42.5 | | Sarah Stuart-Smith | U20 | -5 | Andrew Priest | Kidderminster & Stourport | Kidderminster | 10 Jun 12 | |
| 156 | 42.6 | | | 42.93/42.6 | PB | Rebecca Hoadley | U17 | -7 | Alli Crossman | Guildford & Godalming | Guildford | 17 Jun 12 | |
| 161 | 42.62 | | | 42.62 | PB | Shannon Hylton | U17 | -7 | John Blackie | Blackheath & Bromley | Ashford | 17 Jun 12 | |
| 162 | 42.63 | i | | 42.63i | PB | Eloise Laity | U20 | -5 | | Cardiff | Cardiff | 8 Dec 12 | |
| 163 | 42.64 | | | 42.64 | PB | Gemma Keir | U17 | -8 | Aaron Thomas | Leeds City | Sportcity | 1 Sep 12 | |
| 164 | 42.66 | | | 42.66 | PB | Lizzie Hubner | U17 | -7 | | Mendip | Street | 27 May 12 | |
| 164 | 42.66 | i | | 42.66i | PB | Millie Cooper | U20 | -5 | Ian Richards | Grantham AC | Sheffield | 8 Dec 12 | |
| 166 | 42.67 | | | 42.67 | PB | Ebony Henry-Smith | U17 | -8 | | Sutton & District | Woking | 2 Sep 12 | |
| 167 | 42.68 | i | | 42.68i | PB | Katy Townsend | U17 | -6 | | Cheltenham | Birmingham | 5 Feb 12 | |
| 168 | 42.7 | | | 42.88/42.7 | PB | Molly Ferguson | U17 | -7 | David Hourd | Notts | Milton Keynes | 6 May 12 | |
| 42.88 | | | | | | | | | | Loughborough | 6 Jun 12 | |
| 168 | 42.7 | | | 42.92/42.7 | PB | Elinor (Ellie) Winfield | U17 | -8 | Sandra Woodman | Yate | Yate | 6 May 12 | |
| 42.92 | | | | | | | | | | Exeter | 23 Jun 12 | |
| 168 | 42.7 | | | 42.89/42.7 | PB | Tamara Boyle | U20 | -6 | | City of Derry | Antrim | 19 May 12 | |
| 42.89 | | | | | | | | | | Tullamore, IRL | 2 Jun 12 | |
| 168 | 42.7 | | | 39.58i | | Hayley Waugh | U17 | -7 | | Border | Carlisle | 20 May 12 | |
| 43.76 | i | | | | | | | | | Sportcity | 4 Mar 12 | |
| 168 | 42.7 | | | 42.10i | | Paige Massey | U17 | -6 | Veronica Boden | City of Sheffield | Spinkhill | 20 May 12 | |
| 42.7 | i | | | | | | | | | Sheffield | 24 Nov 12 | |
| 43.04 | | | | | | | | | | Hull | 14 Jul 12 | |
| 168 | 42.7 | | | 43.70i/42.4 | | Lucy Turner | U17 | -8 | Sam Stanislaus | Gateshead | York | 9 Jun 12 | |
| 43.70 | i | | | | | | | | | Sheffield | 14 Jan 12 | |
| 168 | 42.7 | | | 40.83 | | Gillian Gordon | U15 | -9 | Dianne Chisholm | Inverness | Inverness | 12 Aug 12 | |
| 43.10 | | | | | | | | | | Grangemouth | 26 Aug 12 | |
| 168 | 42.7 | i | | 42.7i | PB | Ellie O'Connor | U17 | -9 | Wayne Morant | Chesterfield | Sheffield | 24 Nov 12 | |
| 176 | 42.73 | | | 42.73/42.6 | PB | Gina Sunderland | U17 | -8 | Kay Reynolds | Radley | Horspath | 12 May 12 | |
| 177 | 42.74 | | | 42.63i/41.2 | | Millie Calkin | U15 | -8 | Averil Hewitt | Team Kennet | Basingstoke | 7 Apr 12 | |
| 178 | 42.77 | | | 42.77 | PB | Erin Boddie | U17 | -8 | | Edinburgh AC | Edinburgh | 22 Apr 12 | |
| 179 | 42.78 | | | 42.78 | PB | Carie Robertson | U17 | -7 | Paul Batten | Erme Valley | Exeter | 13 May 12 | |
| 180 | 42.80 | | | 42.80 | PB | Alex Mundell | U17 | -6 | Dave Amey | City of Salisbury | Horspath | 22 Jul 12 | |
| 181 | 42.8 | | | 43.08/42.8 | PB | Paige Lambert | U17 | -6 | | Nene Valley | Milton Keynes | 6 May 12 | |
| 43.08 | | | | | | | | | | Peterborough | 12 May 12 | |
| 181 | 42.8 | | | 42.88/42.8 | PB | Georgia Pickles | U17 | -7 | Matt Cullen | Crewe & Nantwich | Warrington | 12 May 12 | |
| 42.88 | | | | | | | | | | Loughborough | 15 Apr 12 | |
| 181 | 42.8 | | | 42.7 | | Polly Lapage-Norris | U17 | -6 | Paul Bearman | Stratford-upon-Avon | Leamington Spa | 16 Jun 12 | |
| 181 | 42.8 | i | | 41.8i | | Alice Desforges | U20 | -7 | Macdonald Blackman | Rushcliffe | Sheffield | 24 Nov 12 | |
| 185 | 42.83 | i | | 40.71i | | Katie White | U17 | -8 | | Tonbridge | Birmingham | 19 Feb 12 | |
| 43.55 | | | | | | | | | | Ashford | 12 May 12 | |
| 186 | 42.84 | | | 42.84 | PB | Georgia Morgan | U17 | -6 | Paul Darney | Cardiff | Cardiff | 25 Aug 12 | |
| 186 | 42.84 | i | | 42.84i | PB | Celia Taylor | V35 | 13 | | Coventry | Sportcity | 2 Dec 12 | |
| 188 | 42.85 | i | | 41.84i | | Mary Elcock | U20 | -6 | Karen Williams | Oldham & Royton | Sportcity | 4 Mar 12 | |
| 189 | 42.86 | | | 42.86 | PB | Alix Waites | U17 | -6 | Kenneth Jefferson | Sunderland | Gateshead | 13 May 12 | |
| 190 | 42.87 | i | | 42.45 | | Anicia Skeates | U17 | -8 | Michael Strange | Bristol & West | Cardiff | 8 Dec 12 | |
| 43.08 | | | | | | | | | | Exeter | 15 Jul 12 | |
| 191 | 42.88 | | | 42.88 | PB | Erin Quinn | U17 | -7 | | City of Lisburn | Sportcity | 1 Sep 12 | |
| 192 | 42.90 | i | | 42.10i | | Tamieka Cuff | U17 | -8 | Derek Fraser | Trafford | Sportcity | 2 Dec 12 | |
| 193 | 42.9 | | | 43.19/42.9 | PB | Lilian Brower | U17 | -6 | | Camberley | Reading | 15 Apr 12 | |
| 43.19 | | | | | | | | | | Bracknell | 31 Mar 12 | |
| 193 | 42.9 | | | 42.9 | PB | Rebecca Dingemans | U17 | -7 | | Guildford & Godalming | Carshalton | 6 May 12 | |
| 193 | 42.9 | | | 42.9 | PB | Rachel Madden | U17 | -7 | | Herne Hill | Battersea Park | 16 Jun 12 | |
| 193 | 42.9 | | | 43.96/42.9 | PB | Sharon Hutchings | U17 | -7 | Dean Exton | Wimborne | Swindon | 1 Jul 12 | |
| 43.96 | | | | | | | | | | Street | 27 May 12 | |
| 193 | 42.9 | i | | 39.83 | | Elizabeth Musgrove | U17 | -7 | | Haddington RC | Glasgow | 18 Nov 12 | |
| 198 | 42.91 | i | | 42.91i | PB | Melanie Grigg | U17 | -6 | | Herts Phoenix | Lee Valley | 4 Feb 12 | |
| 199 | 42.93 | | | 42.91 | | Zoe Carter | U17 | -6 | | Southampton | Portsmouth | 12 May 12 | |
| 200 | 42.94 | i | | 40.86 | | Sasha Byrom | U20 | -5 | | Preston | Sportcity | 4 Mar 12 | |
| 201 | 42.95 | | | 42.57 | | Catriona Marriott | U17 | -8 | Nigel Bloxham | Cambridge & Coleridge | Cambridge | 2 Jun 12 | |
| 202 | 42.97 | | | 42.82/42.6 | | Janae Galley | U17 | -7 | Jay Galley | Blackheath & Bromley | Sportcity | 2 Sep 12 | |
| 203 | 43.00 | i | | 41.27i | | Katy Wyper | U20 | -4 | Derek Newton | Blackpool, Wyre & Fylde | Sportcity | 2 Dec 12 | |
| 204 | 43.0 | | | 42.5 | | Stephanie Addison | U17 | -7 | Matthew Wood | Gateshead | Jarrow | 23 May 12 | |
| 204 | 43.0 | | | 43.16/43.0 | PB | Emily Lambert | U17 | -6 | Anthony Taylor | Ipswich | Grays | 27 May 12 | |
| 204 | 43.0 | | | 42.04 | | Georgia Harvey | U15 | -8 | | Abingdon | Horspath | 3 Jun 12 | |
| 43.54 | | | | | | | | | | Horspath | 16 Sep 12 | |
| 204 | 43.0 | | | 42.64 | | Claire Capon | | 5 | Gerald Patrick | Dartford H | Dartford | 22 Aug 12 | |
| 208 | 43.04 | | | 42.83i | | Alice Byles | U15 | -9 | Richard Hart | Oxford City | Horspath | 22 Jul 12 | |
| 209 | 43.05 | i | | 41.71 | | April Hunter | U20 | -5 | | Arbroath & District | Glasgow | 9 Feb 12 | |
| 210 | 43.08 | | | 40.33 | | Isio Orogun | U15 | -9 | Alan Champion | Dartford H | Tonbridge | 9 Apr 12 | |
| 210 | 43.08 | | | 38.97 | | Eve Williams | U15 | -9 | Darrell Maynard | Cwmbran | Cardiff | 2 Jun 12 | |
| 210 | 43.08 | | | 43.08 | PB | Louise Ward | U17 | -7 | David Warner | Cheltenham | Exeter | 23 Jun 12 | |
| 213 | 43.10 | i | | 42.20 | | Bethaney Donnelly | U17 | -9 | Neil Canham | Trafford | Sportcity | 2 Dec 12 | |
| 214 | 43.1 | | | 43.1 | PB | Samantha Van Huyssteen | U17 | -7 | | Newbury | Eton | 13 May 12 | |
| 214 | 43.1 | | | 43.1 | PB | Georgia Tuckfield | U17 | -7 | Jane Farrier | Orion | Eltham | 20 May 12 | |
| 214 | 43.1 | | | 42.88 | | Grace Adeyinka | U17 | -7 | Ian Roberts | Rugby & Northampton | Peterborough | 20 May 12 | |
| 43.17 | i | | | | | | | | | Birmingham | 19 Feb 12 | |
| 43.37 | | | | | | | | | | Sportcity | 2 Sep 12 | |
| 214 | 43.1 | | | 41.87 | | Kelly Constable | U17 | -7 | Paul Pepler | Gloucester | Cheltenham | 18 Jul 12 | |
| 214 | 43.1 | | | 43.1 | PB | Sophie Keeble | U17 | -7 | Paul Keeble | Stevenage & North Herts | Stevenage | 16 Sep 12 | |
| 214 | 43.1 | i | | 42.21i | | Rebecca Hall | U17 | -8 | Veronica Boden | City of Sheffield | Sheffield | 24 Nov 12 | |
| 43.32 | i | | | | | | | | | Sheffield | 8 Dec 12 | |
| 43.76 | | | | | | | | | | Cudworth | 12 May 12 | |
| 220 | 43.11 | | | 43.11 | PB | Leia Glading | U15 | -9 | David Lothian | Falkirk | Edinburgh | 12 May 12 | |
| 221 | 43.13 | | | 43.13 | PB | Amy Leahy | U17 | -7 | Nigel Rowland | Pembrokeshire | Swansea | 10 Jun 12 | |
| 222 | 43.14 | | | 42.97/42.9 | | Hollie Parker | U17 | -7 | Alan Baldock | Cambridge & Coleridge | Lee Valley | 14 Apr 12 | |
| 222 | 43.14 | | | 42.25 | | Amy Busby | U17 | -7 | | Oxford City | Horspath | 12 May 12 | |
| 222 | 43.14 | | | 43.14 | PB | S Nyambra | U17 | -6 | | Essex Schs | Chelmsford | 16 Jun 12 | |
| 225 | 43.15 | i | | 42.48i | | Sophie Quinn | U17 | -8 | Joe Frost | DASH | Sportcity | 2 Dec 12 | |
| 226 | 43.17 | | | 43.17 | PB | Emma Canning | U17 | -8 | Iain McEwan | Whitemoss | Wishaw | 17 Jun 12 | |
| 227 | 43.19 | | | 43.00/42.9 | | Bethan Register | U15 | -10 | Steve Knight | Cardiff | Cardiff | 12 May 12 | |
| 228 | 43.20 | | | 42.95 | | Emily Finch | U17 | -7 | | City of Portsmouth | Portsmouth | 12 May 12 | |
| 229 | 43.2 | | | 41.56 | | Nastassja Allin | U15 | -8 | Michael West | Enfield & Haringey | Lee Valley | 10 Jun 12 | |
| 230 | 43.22 | | | 42.02 | | Heide Biberbach-Laidlaw | U17 | -8 | Enid Johnstone | Edinburgh AC | Edinburgh | 22 Apr 12 | |
| 231 | 43.26 | | | 43.26 | PB | Elise Davies | U17 | -6 | Neal Merry | Swansea | Cardiff | 2 Jun 12 | |
| 232 | 43.30 | | | 43.30 | PB | Nadia Mills | U20 | -4 | | Ealing Southall & Middx | Lee Valley | 14 Apr 12 | |
| 232 | 43.30 | | | 43.30 | PB | Amy Botham | U17 | -8 | Barry Hearn | Marshall Milton Keynes | Horspath | 12 May 12 | |
| 232 | 43.30 | | | 42.62 | | Sophie Mansfield | U15 | -8 | Mark Best | Crawley | Crawley | 18 Jul 12 | |
| 235 | 43.3 | | | 42.50i/41.3 | | Rachel Bell | U17 | -7 | Peter Gifford | Cleethorpes | Blackpool | 11 Mar 12 | |
| 235 | 43.3 | | | 43.3 | PB | Isobel Glaisher | U17 | -7 | Clive Thomas | Yeovil | Bath | 6 May 12 | |
| 235 | 43.3 | | | 43.10i | | Siobhan Glover | U17 | -7 | Andy Poppleton | Worcester | Worcester | 12 May 12 | |
| 43.84 | | | | | | | | | | Gateshead | 6 Jul 12 | |
| 235 | 43.3 | | | 44.63i/42.2 | | Sophia Martin | U15 | -8 | | Corby | Corby | 13 May 12 | |
| 235 | 43.3 | | | 43.3 | PB | Becky Moore | U17 | -6 | | Aldershot, Farnham & District | Wormwood Scrubs | 20 May 12 | |
| 235 | 43.3 | | | 41.42 | | Ademide Ademuyewo | U23 | -1 | Ken Hogg | Aberdeen | Aberdeen | 24 May 12 | |
| 235 | 43.3 | | | 43.3 | PB | Lucy Roach | U17 | -7 | Paul Smith | Burton | Stoke | 16 Jun 12 | |
| 235 | 43.3 | | | 43.31/43.3 | PB | Jemima Paul | U17 | -7 | | Harrow | Harrow | 17 Jun 12 | |
| 43.31 | | | | | | | | | | Hendon | 12 Jun 12 | |
| 235 | 43.3 | | | 42.14i | | Heather Cooke | U15 | -9 | David Harmes | Scunthorpe & District AC (Defunct) | Grimsby | 15 Sep 12 | |
| 244 | 43.32 | i | | 43.32i | PB | Jade Williams | | 3 | | Cardiff | Cardiff | 8 Dec 12 | |
| 245 | 43.34 | i | | 43.34i/43.3i | PB | Sarah Pearson | U15 | -9 | John Dawson | Central | Glasgow | 11 Mar 12 | |
| 43.6 | | | | | | | | | | Grangemouth | 15 Sep 12 | |
| 246 | 43.38 | | | 43.02 | | Katie Snedden | U17 | -7 | Dianne Chisholm | Inverness | Inverness | 6 Jun 12 | |
| 247 | 43.39 | | | 43.39 | PB | Kloe Storrie | U17 | -6 | | Aldershot, Farnham & District | Kingston | 12 May 12 | |
| 248 | 43.4 | | | 44.36i/43.4 | PB | Gabrielle Whittle | U17 | -7 | Carl Foster | Wigan & District | Carlisle | 20 May 12 | |
| 248 | 43.4 | | | 45.51/43.4 | PB | Danielle Scott | U17 | -6 | Paul Thomas | City of Salisbury | Marlborough | 27 May 12 | |
| 248 | 43.4 | | | 42.1 | | Rosie Dale | U15 | -8 | | Lancaster & Morecambe | Hyndburn | 23 Jun 12 | |
| 248 | 43.4 | | | 45.48/43.4 | PB | Abigail Spink | U15 | -8 | | Havering | Bedford | 8 Jul 12 | |
| 248 | 43.4 | | | 42.19 | | Chloe Thornton | U15 | -9 | | Enfield & Haringey | Lee Valley | 8 Jul 12 | |
| 248 | 43.4 | | | 43.4 | PB | Lisa Martin | U17 | -7 | Stewart McIntyre | Reigate Priory | Walton | 21 Jul 12 | |
| 248 | 43.4 | | | 42.69 | | Indea Adams-Burnett | U17 | -8 | | Luton | Luton | 19 Aug 12 | |
| 255 | 43.42 | i | | 43.42i | PB | Caitlin Stewart | U17 | -7 | Kenny Milton | Kilbarchan | Glasgow | 9 Feb 12 | |
| 256 | 43.43 | i | | 41.75i | | Katie Dinsdale | U17 | -8 | Robert Roberts | Halton & Frodsham | Sportcity | 2 Dec 12 | |
| 257 | 43.46 | | | 43.19 | | Alana Crawford | U17 | -7 | Mark Smith | North Ayrshire | Grangemouth | 17 Jun 12 | |
| 257 | 43.46 | i | | 43.46i | PB | Maegan Taylor | U20 | -5 | | Kingston upon Hull | Sheffield | 8 Dec 12 | |
| 259 | 43.50 | | | 43.50 | PB | Elena Cervi | U17 | -8 | Paul Keeble | Stevenage & North Herts | Cambridge | 2 Jun 12 | |
| 259 | 43.50 | | | 43.50 | PB | Chloe Howes | U17 | -7 | | City of Lisburn | Sportcity | 1 Sep 12 | |
| 261 | 43.5 | i | | 44.10i/43.5i | PB | Jenny O'Brien | U17 | -6 | | City of Derry | Nenagh, IRL | 24 Mar 12 | |
| 261 | 43.5 | | | 41.37 | | Katie Hewitt | U23 | -2 | Tony Lett | Cornwall AC | Par | 7 Apr 12 | |
| 261 | 43.5 | | | 43.5 | PB | Leah Paulley | | 4 | | Newquay & Par | Stourport | 15 Apr 12 | |
| 261 | 43.5 | | | 43.5 | PB | Yemma Songu | U17 | -8 | Dean Garrett | Bristol & West | Yate | 15 Apr 12 | |
| 261 | 43.5 | | | 43.2 | | Sarah McDonald | U20 | -4 | Bud Baldaro | Jarrow & Hebburn | Jarrow | 25 Apr 12 | |
| 261 | 43.5 | | | 43.96/43.5 | PB | Molly Webster | U17 | -8 | Kieron Hall | Harrogate | York | 6 May 12 | |
| 43.96 | | | | | | | | | | Cleckheaton | 2 Sep 12 | |
| 261 | 43.5 | | | 42.78 | | Gemma Broomfield | U15 | -8 | Joseph McDonnell ☘️ | Charnwood | Leicester | 13 May 12 | |
| 261 | 43.5 | | | 43.54/43.1 | | Lucy Lennon | U17 | -8 | Don Lennon | Ribble Valley AC (Defunct) | Blackburn | 2 Jun 12 | |
| 261 | 43.5 | | | 39.81i | | Zoe Hughes | U15 | -9 | Tony Benton | Havering | Lee Valley | 10 Jun 12 | |
| 261 | 43.5 | | | 43.22i | | Imogen Sweet | U17 | -7 | | Millfield Sch | Street | 20 Jun 12 | |
| 43.69 | | | | | | | | | | Yeovil | 16 Jun 12 | |
| 261 | 43.5 | | | 43.78/43.5 | PB | Hannah Carson | | 4 | Gerald Patrick | Dartford H | Dartford | 22 Aug 12 | |
| 261 | 43.5 | | | 42.01 | | Phoebe Baker | U15 | -9 | Barbara Clarke | Great Yarmouth | Bury St Edmunds | 23 Sep 12 | |
| 261 | 43.5 | i | | 43.5i | PB | Olivia Pearce | U20 | -5 | | Leeds Beckett Uni | Sheffield | 24 Nov 12 | |
| 274 | 43.52 | | | 42.54 | | Sarah Henderson | U17 | -7 | | Caithness AAC | Inverness | 16 Sep 12 | |
| 275 | 43.53 | | | 43.53 | PB | Grace Hadfield | U17 | -6 | | Leicestershire Schs | Loughborough | 6 Jun 12 | |
| 275 | 43.53 | | | 43.53 | PB | Sophie Lee | U17 | -6 | Pam Piercy | Goole Youth | Hull | 14 Jul 12 | |
| 275 | 43.53 | | | 42.73i | | Sharon Jakisa | U17 | -7 | Eddie McKenna | Victoria Park City of Glasgow | Bedford | 18 Aug 12 | |
| 278 | 43.54 | i | | 43.54i | PB | Harriet Sawle | U17 | -6 | Kerry Eddie (nee Jury) | Cheltenham | Birmingham | 19 Feb 12 | |
| 43.7 | | | | | | | | | | Abingdon | 20 May 12 | |
| 279 | 43.56 | i | | 42.59 | | Amy Manson | U20 | -5 | John Dawson | Falkirk | Glasgow | 9 Feb 12 | |
| 279 | 43.56 | i | | 42.24/41.8 | | Laura Puleston | U17 | -8 | Paul Batten | Erme Valley | Cardiff | 8 Dec 12 | |
| 281 | 43.57 | | | 43.57 | PB | Sarah Connor | U17 | -8 | Norman Gardiner | Pitreavie | Edinburgh | 22 Apr 12 | |
| 281 | 43.57 | | | 43.57 | PB | Rebecca Firth | U17 | -8 | | Wakefield | Wakefield | 21 Jul 12 | |
| 283 | 43.59 | | | 43.59 | PB | Lucy Mulvain | U17 | -7 | Matthew Wood | Gateshead | Wakefield | 17 Jun 12 | |
| 284 | 43.60 | | | 42.12/42.1 | | Tabitha Lambe | U15 | -8 | | Sutton & District | Tooting Bec | 21 Jul 12 | |
| 285 | 43.6 | | | 43.21 | | Lucy Shaw | U15 | -9 | Keith Palmer | Southend | Watford | 29 Apr 12 | |
| 43.71 | | | | | | | | | | Chelmsford | 12 May 12 | |
| 285 | 43.6 | | | 43.6 | PB | D'arcy-lee Dawson | U17 | -7 | Stephen Carroll | Liverpool H | Bebington | 20 May 12 | |
| 285 | 43.6 | | | 42.44i | | Megan Ashelby | U17 | -7 | Andrew Owen | Stockport | Cleckheaton | 20 May 12 | |
| 285 | 43.6 | | | 43.59 | | Eleanor Drake | U15 | -8 | Barry Palmer | Diss | Ipswich | 20 May 12 | |
| 285 | 43.6 | | | 43.87/43.6 | PB | Taysharne Smith | U17 | -8 | | Coventry | Coventry | 17 Jun 12 | |
| 285 | 43.6 | | | 43.6 | PB | Georgina Outten | U17 | -7 | | Colwyn Bay | Colwyn Bay | 8 Sep 12 | |
| 285 | 43.6 | | | 44.61i/42.6 | | Katrina Steele | U17 | -8 | Paul Wibberley | Horwich | Blackpool | 9 Sep 12 | |
| 292 | 43.63 | | | 43.63 | PB | Abbie McFarlane | U17 | -7 | | Victoria Park City of Glasgow | Grangemouth | 26 Aug 12 | |
| 293 | 43.64 | | | 43.64 | PB | Georgia Dickinson | U15 | -10 | | Neath | Cardiff | 2 Jun 12 | |
| 293 | 43.64 | | | 43.46/43.3 | | Jessica Bennett | U17 | -6 | Mark Brace | North Devon | Exeter | 23 Jun 12 | |
| 295 | 43.65 | i | | 43.65i/43.6 | PB | Suzanne Bentley | U17 | -7 | Tim Higman | St. Albans AC | Lee Valley | 11 Feb 12 | |
| 295 | 43.65 | | | 43.65 | PB | Melanie Chiswell | U17 | -8 | | Victoria Park City of Glasgow | Grangemouth | 26 Aug 12 | |
| 297 | 43.69 | i | | 38.78 | | Amelia Reynolds | U15 | -9 | Elwyn Jarrett | Newport H | Cardiff | 21 Jan 12 | |
| 297 | 43.69 | | | 43.64/43.4 | | Joanne Peak | U17 | -7 | Bryn Percival | Cambridge & Coleridge | Peterborough | 12 May 12 | |
| 299 | 43.70 | i | | 43.70i/42.7 | PB | Charlotte Redden | U17 | -6 | Bill Boyd | Corby | Birmingham | 5 Feb 12 | |
| 299 | 43.70 | | | 42.77 | | Kirsty Ann Forsyth | U17 | -6 | | Central | Edinburgh | 22 Apr 12 | |
| 301 | 43.7 | | | 43.73/43.3 | | Rachel Dumbrell | U15 | -8 | Dean Exton | Dorchester | Bournemouth | 1 Apr 12 | |
| 301 | 43.7 | | | 43.7 | PB | Emily Dixon | U17 | -6 | Diana Viles | Team Bath | Yate | 15 Apr 12 | |
| 301 | 43.7 | | | 43.86/43.7 | PB | Aisling Draper | U17 | -8 | | Harrow | Lee Valley | 6 May 12 | |
| 43.86 | | | | | | | | | | Hendon | 12 Jun 12 | |
| 301 | 43.7 | | | 46.14/43.7 | PB | Kelly Mavididi | U17 | -7 | Jeffrey Nkrumah | Ilford | Eltham | 20 May 12 | |
| 301 | 43.7 | | | 42.63/41.9 | | Sophie Rickner | U15 | -9 | Colin Corless | Southend | Southend | 10 Jun 12 | |
| 301 | 43.7 | | | 44.27/43.7 | PB | Rachel Laqeretabua | U17 | -8 | David Hull | Tonbridge | Ashford | 16 Jun 12 | |
| 301 | 43.7 | | | 46.42i/43.7 | PB | Beth Sharkey | U17 | -7 | | Halesowen | Coventry | 17 Jun 12 | |
| 301 | 43.7 | | | 43.7 | PB | Sheila Amadasun | U17 | -8 | Alf Vickers | Victoria Park & Tower Hamlets | Chelmsford | 30 Jun 12 | |
| 301 | 43.7 | | | 43.7 | PB | Katie Kearsey | U13 | -11 | David Lucas | Forest of Dean AC | Cheltenham | 18 Jul 12 | |
| 301 | 43.7 | | | 42.65i/41.8 | | Jordan Dixon | U15 | -8 | Dezz Reynolds | Blackpool, Wyre & Fylde | Blackpool | 25 Aug 12 | |
| 301 | 43.7 | | | 42.06/41.5 | | Ellie Ravenscroft | U15 | -9 | Richard Eastman | Kidderminster & Stourport | Leamington | 2 Sep 12 | |
| 301 | 43.7 | | | 43.5 | | Charlotte Dale | U17 | -7 | Victor Bevington | Newcastle (Staffs) AC | Worcester | 2 Sep 12 | |
| 313 | 43.71 | | | 43.71 | PB | Emma Hennessy | U17 | -8 | Ivor Adams | Newport H | Cardiff | 2 Jun 12 | |
| 314 | 43.72 | | | 43.72 | PB | Hollie Keanie | U17 | -7 | | Pitreavie | Grangemouth | 17 Jun 12 | |
| 314 | 43.72 | | | 42.10 | | Rebecca Lord | U15 | -10 | Chris Jackson | Leamington | Loughborough | 19 Aug 12 | |
| 314 | 43.72 | | | 43.72 | PB | Ashley Sweeney | U17 | -6 | | Giffnock North | Sportcity | 1 Sep 12 | |
| 314 | 43.72 | i | | 42.26i | | Bethany McManus | U23 | -2 | Mike Corden | East Cheshire | Sheffield | 8 Dec 12 | |
| 318 | 43.73 | | | 43.49/42.6 | | Abbie Hewitt | U17 | -7 | Tony Lett | Cornwall AC | Exeter | 27 May 12 | |
| 319 | 43.74 | | | 43.74/43.6 | PB | Alice Chandler | U17 | -7 | Stewart McIntyre | Reigate Priory | Tooting Bec | 14 Apr 12 | |
| 320 | 43.76 | | | 43.76 | PB | Natalie Jones | U17 | -7 | | | Lee Valley | 14 Apr 12 | |
| 321 | 43.77 | i | | 43.77i/42.7 | PB | Emma Wood | U17 | -7 | | Grimsby | Sportcity | 2 Dec 12 | |
| 322 | 43.78 | i | | 42.14 | | Molly Thomson | U15 | -10 | Robert Roberts | Liverpool H | Sportcity | 2 Dec 12 | |
| 323 | 43.80 | i | | 43.80i | PB | Sophie Coghill | U17 | -8 | Thomas Graham | Victoria Park City of Glasgow | Glasgow | 4 Mar 12 | |
| 324 | 43.8 | | | 42.71i/42.4 | | Sophie Worrall | U20 | -5 | Arnie Wray | Telford AC | Telford | 11 Apr 12 | |
| 324 | 43.8 | | | 43.55/43.5 | | Charmaine Porter | U20 | -6 | | Jarrow & Hebburn | Jarrow | 25 Apr 12 | |
| 324 | 43.8 | | | 43.75 | | Emily Rowlands | U17 | -7 | Glyn Davies | Wrexham | Wrexham | 6 May 12 | |
| 324 | 43.8 | | | 43.96/43.8 | PB | Maria Jones | U17 | -6 | David Taylor | Bristol & West | Yate | 6 May 12 | |
| 43.96 | | | | | | | | | | Yate | 12 May 12 | |
| 324 | 43.8 | | | 47.60/43.8 | PB | Madeleine Perrins | U17 | -8 | Bryan Clinton | Swindon | Tidworth | 13 May 12 | |
| 324 | 43.8 | | | 43.8 | PB | Lillie Bellamy | U17 | -7 | Bryan Clinton | Swindon | Tidworth | 13 May 12 | |
| 324 | 43.8 | | | 42.42/42.0 | | Alice Cunningham | U17 | -8 | Bill Boyd | Corby | Mansfield | 20 May 12 | |
| 324 | 43.8 | | | 43.8 | PB | Hannah Viner | U17 | -7 | | Highgate | Battersea Park | 16 Jun 12 | |
| 324 | 43.8 | | | 43.8 | PB | Lauren Peach | U17 | -7 | | Great Yarmouth | King's Lynn | 1 Jul 12 | |
| 324 | 43.8 | | | 44.45/43.8 | PB | Louisa Cooper | U17 | -7 | Joseph McDonnell ☘️ | Charnwood | Leicester | 14 Jul 12 | |
| 324 | 43.8 | | | 43.8 | PB | Sarah Higgins | U15 | -9 | | Coventry | Nuneaton | 21 Jul 12 | |
| 324 | 43.8 | | | 45.28/43.8 | PB | Rhiannon Jenkins | U17 | -8 | | Basingstoke & Mid Hants | Bournemouth | 22 Jul 12 | |
| 324 | 43.8 | i | | 41.63 | | Georgia Hollis-Lawrence | U15 | -10 | Veronica Boden | City of Sheffield | Sheffield | 24 Nov 12 | |
| 337 | 43.83 | | | 42.03/41.8 | | Lucy Hickmott | U20 | -6 | Alan Champion | Dartford H | Tonbridge | 9 Apr 12 | |
| 338 | 43.84 | | | 43.61 | | Megan Brooke | U17 | -8 | | Woking | Andover | 4 Jun 12 | |
| 338 | 43.84 | i | | 43.27i | | Nicole Norton | U20 | -6 | | Doncaster | Sheffield | 8 Dec 12 | |
| 340 | 43.86 | i | | 42.45 | | Lucy Fligelstone | U17 | -8 | Wynford Leyshon | Swansea | Cardiff | 5 Feb 12 | |
| 340 | 43.86 | | | 43.86 | PB | Megan Devine | U17 | -7 | | City of Derry | Antrim | 28 Apr 12 | |
| 340 | 43.86 | | | 42.20 | | Emily Stone | U20 | -5 | | Tonbridge | Tonbridge | 1 May 12 | |
| 343 | 43.87 | | | 43.87 | PB | Sarah Hamilton | U17 | -8 | Philip Horrocks | Wigan & District | Hull | 14 Jul 12 | |
| 344 | 43.89 | | | 43.89/43.8 | PB | Sarah Biegel | U17 | -7 | | Banbury | Horspath | 12 May 12 | |
| 345 | 43.90 | i | | 42.91 | | Kirsty McKean | U17 | -7 | | Edinburgh AC | Glasgow | 11 Mar 12 | |
| 346 | 43.9 | | | 43.9 | PB | Emma Tilbrook | U20 | -5 | | West Norfolk | Great Yarmouth | 12 Apr 12 | |
| 346 | 43.9 | | | 43.9 | PB | Lydia Smith | U17 | -8 | Dave Naylor | Havering | Bromley | 6 May 12 | |
| 346 | 43.9 | | | 43.9 | PB | Lydia Randles | U17 | -7 | | Sale Harriers Manchester | Warrington | 12 May 12 | |
| 346 | 43.9 | | | 39.68i | | Isabella Hilditch | U15 | -10 | John Blackie | Blackheath & Bromley | Bromley | 4 Jun 12 | |
| 346 | 43.9 | | | 43.9 | PB | Pia Davis | U15 | -9 | | Dacorum | Southend | 10 Jun 12 | |
| 346 | 43.9 | | | 44.58/43.9 | PB | Jessica Robins | U17 | -7 | Christopher Brown | Stroud | Cheltenham | 18 Jul 12 | |
| 346 | 43.9 | | | 44.20/43.9 | PB | Freya Savage | U17 | -7 | | Guildford & Godalming | Walton | 21 Jul 12 | |
| 346 | 43.9 | | | 42.98/41.4 | | Pamela McNicol | U15 | -9 | Sandy Robertson | Law | Carluke | 29 Sep 12 | |
| 346 | 43.9 | | | 44.45i/43.9 | PB | Abigail Rudd | U23 | -2 | Sonya Ellis | Newbury | Exeter | 21 Nov 12 | |
| 355 | 43.92 | i | | 40.63 | | Aileen Kearney | U17 | -9 | Graham Patterson | Wirral | Sportcity | 2 Dec 12 | |
| 356 | 43.93 | | | 41.92 | | Poppy Collins | U15 | -9 | Carlo Monticolombi | Invicta East Kent | Canterbury | 9 Sep 12 | |
| 357 | 43.94 | | | 43.94 | PB | Gabrielle Home | U17 | -7 | | Woking | Bracknell | 31 Mar 12 | |
| 358 | 43.96 | | | 43.96 | PB | Maya Jennings | U17 | -8 | James Bennett | Marshall Milton Keynes | Horspath | 12 May 12 | |
| 358 | 43.96 | | | 43.96 | PB | Catherine Blakeman | U17 | -8 | | Cueva de Nerja | Málaga (C), ESP | 26 May 12 | |
| 360 | 43.97 | i | | 43.87/43.3 | | Naomi Collier | U20 | -5 | | Grantham AC | Sheffield | 8 Dec 12 | |
| 361 | 44.0 | | | 41.4 | | Bobby Clay | U17 | -8 | James Roberts | Invicta East Kent | Canterbury | 11 Apr 12 | |
| 361 | 44.0 | | | 43.53 | | Emily Wooster | U15 | -9 | | Barry & Vale | Neath | 26 May 12 | |
| 361 | 44.0 | | | 45.03/44.0 | PB | Kaeshelle Cooke | U17 | -7 | Edwin Stevens | Enfield & Haringey | Lee Valley | 10 Jun 12 | |
| 361 | 44.0 | | | 44.0 | PB | Megan Soanes | U17 | -7 | | City of Norwich | Bury St Edmonds | 1 Jul 12 | |
| 361 | 44.0 | | | 41.47 | | Daizy Lee | U17 | -8 | | Herts Phoenix | Lee Valley | 8 Jul 12 | |
| 361 | 44.0 | | | 44.0 | PB | Courtney Smith | U15 | -10 | Andrew Gifford | Halesowen | Banbury | 21 Jul 12 | |
| 361 | 44.0 | | | 46.61/43.9 | | Eleanor Gennings | U17 | -7 | | New Forest Junior | Bournemouth | 22 Jul 12 | |
| 361 | 44.0 | | | 42.8 | | Laura Johnson | U17 | -8 | David Willis | City of Norwich | Stevenage | 16 Sep 12 | |
| 361 | 44.0 | | | 44.40/43.8 | | Georgie Taylor | U17 | -7 | Brian Kiernan | Havering | Stevenage | 16 Sep 12 | |
| 361 | 44.0 | | | 44.13i/43.1 | | Rachael Kelleher | U20 | -4 | | Wycombe | Exeter | 21 Nov 12 | |
| 41.2 | | | 41.2 | PB | Sonia Santos | U23 | -2 | Dean Lewis | Kingston upon Hull | Scunthorpe | 25 Mar 12 | |
| 41.74 | i | | 41.74i | PB | Susan Tengatenga Duley | | 5 | Roger Devlin | Bromsgrove & Redditch | Sportcity | 4 Mar 12 | |
| 43.71 | i | | 43.71i | PB | Laurence Thill | U23 | -3 | Sonya Ellis | Exeter Uni | Cardiff | 8 Dec 12 | |