(1) | 25.97/0.0 | CBP | Sasha Nolan | (Herne Hill Harriers) | 1 FINAL | Kingsmeadow Stadium | 12 May 2024 |
(2) | 26.3/+7.8 | CBP | Sandra French | (Feltham AC) | 1 FINAL | Motspur Park | 15 May 1976 |
(3) | 26.56/0.0 | | Emma Kjaer | (Kingston AC & Polytechnic Harriers) | 2 FINAL | Kingsmeadow Stadium | 12 May 2024 |
(4) | 26.59/-0.9 | | Casielle Murray | (Croydon Harriers) | 1 FINAL | Kingsmeadow Stadium | 14 May 2023 |
(5) | 26.6/+3.9 | CBP | Sandra French | (Feltham AC) | 1 S-FINAL 1 | Motspur Park | 15 May 1976 |
(6) | 26.67/+1.1 | | Marcia Sey | (Croydon Harriers) | 1 HEAT 1 | Kingsmeadow Stadium | 25 May 2014 |
(7) | 26.75/-0.9 | | Saray-Destiny Crosdale | (Croydon Harriers) | 2 FINAL | Kingsmeadow Stadium | 14 May 2023 |
(8) | 26.87/-0.4 | | Marcia Sey | (Croydon Harriers) | 1 FINAL | Kingsmeadow Stadium | 25 May 2014 |
(9) | 26.9w/+5.1 | | Janet Smith | (Mitcham AC) | 1 FINAL | Motspur Park | 16 May 1981 |
| 26.9/0.0 | | Donna Fraser | (Croydon Harriers) | 1 FINAL | Motspur Park | 18 May 1985 |
(11) | 26.98/-1.5 | | Casielle Murray | (Croydon Harriers) | 1 HEAT 1 | Kingsmeadow Stadium | 14 May 2023 |
(12) | 26.99/-1.9 | | Lia Bonsu | (Croydon Harriers) | 1 FINAL | Kingsmeadow Stadium | 13 May 2018 |
(13) | 27.0/+2.9 | | Ann Flannery | (Mitcham AC) | 1 FINAL | Motspur Park | 15 May 1982 |
(14) | 27.03/0.0 | | Sasha Nolan | (Herne Hill Harriers) | 1 HEAT 3 | Kingsmeadow Stadium | 12 May 2024 |
(15) | 27.06/-0.2 | | Emma Kjaer | (Kingston AC & Polytechnic Harriers) | 1 HEAT 2 | Kingsmeadow Stadium | 12 May 2024 |
(16) | 27.1 | | Twinelle Hopeson | (Archbishop Tennison School, Croydon) | 1 FINAL | Kingsmeadow Stadium | 16 May 2004 |
(17) | 27.23/+1.6 | | Maya Bruney | (Blackheath & Bromley Harriers AC) | 1 FINAL | Kingsmeadow Stadium | 9 May 2010 |
(18) | 27.3 | | Janet Smith | (Mitcham AC) | 1 HEAT 1 | Motspur Park | 13 May 1981 |
| 27.3/+0.6 | | Stefanie Knight | (Herne Hill Harriers) | 1 FINAL | Kingsmeadow Stadium | 13 May 2001 |
(20) | 27.36/0.0 | | Ebony Rose-Donkor | (Croydon Harriers) | 3 FINAL | Kingsmeadow Stadium | 12 May 2024 |
(21) | 27.37/-1.5 | | Indiana Marshall | (Woking AC) | 1 FINAL | Kingsmeadow Stadium | 12 May 2019 |
(22) | 27.38 | | Grace Nunn | (Holland Sports AC) | 1 HEAT 2 | Kingsmeadow Stadium | 1 August 2021 |
(23) | 27.4 | CBP | Sandra French | (Feltham AC) | 1 HEAT 1 | Motspur Park | 12 May 1976 |
(24) | 27.45/+1.7 | | Amelia Montegnani | (Herne Hill Harriers) | 1 FINAL | Kingsmeadow Stadium | 12 May 2002 |
| 27.45/-1.2 | | Twinelle Hopeson | (Archbishop Tennison School, Croydon) | 1 HEAT 1 | Kingsmeadow Stadium | 16 May 2004 |
(26) | 27.46/+0.4 | | Maya Bruney | (Blackheath & Bromley Harriers AC) | 1 HEAT 1 | Kingsmeadow Stadium | 9 May 2010 |
(27) | 27.48/-0.2 | | Ebony Rose-Donkor | (Croydon Harriers) | 2 HEAT 2 | Kingsmeadow Stadium | 12 May 2024 |
(28) | 27.5 | | Lynne Draper | (Redhill & Reigate AC) | 1 HEAT 2 | Motspur Park | 10 May 1979 |
| 27.5w/+4.2 | | Janet Smith | (Mitcham AC) | 1 S-FINAL 2 | Motspur Park | 16 May 1981 |
| 27.5/+1.7 | | Ann Flannery | (Mitcham AC) | 1 S-FINAL 1 | Motspur Park | 15 May 1982 |
(31) | 27.59/-1.5 | | Monae Winston | (Herne Hill Harriers) | 1 HEAT 1 | Kingsmeadow Stadium | 24 May 2015 |
(32) | 27.6 | | Lynne Draper | (Redhill & Reigate AC) | 1 FINAL | Motspur Park | 12 May 1979 |
| 27.6 | | Ann Flannery | (Mitcham AC) | 1 HEAT 1 | Motspur Park | 12 May 1982 |
| 27.6/0.0 | | Donna Fraser | (Croydon Harriers) | 1 S-FINAL 1 | Motspur Park | 18 May 1985 |
| 27.60/-2.6 | | Ella Rennie | (Herne Hill Harriers) | 1 FINAL | Kingsmeadow Stadium | 1 August 2021 |
(36) | 27.63/-1.5 | | Zoe Dake | (Croydon Harriers) | 1 FINAL | Kingsmeadow Stadium | 24 May 2015 |
| 27.63/0.0 | | Casielle Murray | (Croydon Harriers) | 1 S-FINAL 1 | Kingsmeadow Stadium | 15 May 2022 |
(38) | 27.64/-1.9 | | Sophie Ajuka | (Sutton & District AC) | 2 FINAL | Kingsmeadow Stadium | 13 May 2018 |
(39) | 27.66 | | Sophie Ajuka | (Sutton & District AC) | 1 HEAT 2 | Kingsmeadow Stadium | 13 May 2018 |
(40) | 27.67/-1.2 | | Saray-Destiny Crosdale | (Croydon Harriers) | 1 HEAT 3 | Kingsmeadow Stadium | 14 May 2023 |
(41) | 27.69/-0.4 | | Tumininu Araga | (Woking AC) | 2 FINAL | Kingsmeadow Stadium | 25 May 2014 |
(42) | 27.70/+0.1 | | Faith Price | (Herne Hill Harriers) | 1 FINAL | Kingsmeadow Stadium | 15 May 2016 |
(43) | 27.73/-0.4 | | Barbara Folayan | (Herne Hill Harriers) | 3 FINAL | Kingsmeadow Stadium | 25 May 2014 |
| 27.73/-0.8 | | Katy Beadle | (Slough Juniors) | 1 HEAT 2 | Kingsmeadow Stadium | 14 May 2017 |
(45) | 27.74/-0.7 | | Katy Beadle | (Slough Juniors) | 1 FINAL | Kingsmeadow Stadium | 14 May 2017 |
(46) | 27.75/-1.5 | | Zoe Dake | (Croydon Harriers) | 2 HEAT 1 | Kingsmeadow Stadium | 24 May 2015 |
(47) | 27.76/0.0 | | Caleisha Cole | (Walton AC) | 1 FINAL | Kingsmeadow Stadium | 15 May 2005 |
| 27.76/-1.5 | | Alishia Reid | (South London Harriers) | 3 HEAT 1 | Kingsmeadow Stadium | 24 May 2015 |
(49) | 27.8 | | Laura Ferriroli | (Croydon Harriers) | 1 FINAL | Motspur Park | 14 May 1977 |
| 27.8/+1.4 | | Clover Wynter-Pink | (Croydon Harriers) | 1 FINAL | Croydon Arena | 20 May 1990 |
| 27.8/+1.4 | | Simone Harrison | (Croydon Harriers) | 2 FINAL | Croydon Arena | 20 May 1990 |
| 27.8/+1.0 | | Stefanie Knight | (Herne Hill Harriers) | 1 HEAT 1 | Kingsmeadow Stadium | 13 May 2001 |
| 27.80/-1.4 | | Pippa Earley | (Kingston AC & Polytechnic Harriers) | 1 FINAL | Kingsmeadow Stadium | 26 May 2013 |
|
53 performances of 27.80 or better. |