(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 |
|
25 performances of 27.45 or better. |