(1) | 24.6 | | Janis Walsh | (Mitcham AC) | 1 FINAL | Motspur Park | 18 May 1974 |
(2) | 24.82/+2.6 | | Holly Ryan | (Shaftesbury Barnet Harriers) | 1 FINAL | Kingsmeadow Stadium | 11 May 2024 |
(3) | 25.0/+8.0 | | Lynne Draper | (Redhill & Reigate AC) | 1 FINAL | Motspur Park | 16 May 1981 |
(4) | 25.1/+0.1 | | Donna Fraser | (Croydon Harriers) | 1 FINAL | Tooting Bec | 17 May 1987 |
(5) | 25.2 | | Janis Walsh | (Mitcham AC) | 1 S-FINAL 1 | Wimbledon Park | 15 May 1974 |
(6) | 25.3/-0.3 | | Donna Fraser | (Croydon Harriers) | 1 HEAT 1 | Tooting Bec | 16 May 1987 |
(7) | 25.34/0.3 | | Gracelyn Kendeck | (Croydon Harriers) | 1 FINAL | Kingsmeadow Stadium | 14 May 2022 |
(8) | 25.38/+2.6 | | Shivelle Marshall | (Croydon Harriers) | 2 FINAL | Kingsmeadow Stadium | 11 May 2024 |
| 25.38/+0.2 | | Shivelle Marshall | (Croydon Harriers) | 1 HEAT 5 | Kingsmeadow Stadium | 11 May 2024 |
(10) | 25.4w/(+4.1) | | Bernadette Ross | (Mitcham AC) | 1 FINAL | Motspur Park | 15 May 1982 |
(11) | 25.41/-0.7 | | Maya Bruney | (Blackheath & Bromley Harriers AC) | 1 FINAL | Kingsmeadow Stadium | 12 May 2012 |
| 25.41/+1.2 | | Rhiannon Gayle | (Croydon Harriers) | 1 FINAL | Kingsmeadow Stadium | 23 May 2015 |
(13) | 25.48/-0.7 | | Holly Ryan | (Shaftesbury Barnet Harriers) | 1 S-FINAL 1 | Kingsmeadow Stadium | 11 May 2024 |
(14) | 25.5w/+2.7 | | Donna Fraser | (Croydon Harriers) | 1 S-FINAL 1 | Tooting Bec | 16 May 1987 |
(15) | 25.54/-0.1 | | Kayla Bowley | (Croydon Harriers) | 1 FINAL | Kingsmeadow Stadium | 14 May 2016 |
(16) | 25.63/-0.7 | | Imani Lansiquot | (Sutton & District AC) | 2 FINAL | Kingsmeadow Stadium | 12 May 2012 |
(17) | 25.64/-0.7 | | Shivelle Marshall | (Croydon Harriers) | 2 S-FINAL 1 | Kingsmeadow Stadium | 11 May 2024 |
(18) | 25.67/-0.7 | | Ashleigh Clarke | (Croydon Harriers) | 3 FINAL | Kingsmeadow Stadium | 12 May 2012 |
(19) | 25.68/-0.1 | | Racheal Largie-Poleon | (Croydon Harriers) | 1 FINAL | Kingsmeadow Stadium | 13 May 2017 |
(20) | 25.7 | | Marcia van Frederici | (Mitcham AC) | 1 S-FINAL 2 | Motspur Park | 15 May 1976 |
| 25.7 | | Janet Smith | (Mitcham AC) | 1 HEAT 1 | Motspur Park | 19 May 1983 |
(22) | 25.71/+0.2 | | Holly Ryan | (Shaftesbury Barnet Harriers) | 2 HEAT 5 | Kingsmeadow Stadium | 11 May 2024 |
(23) | 25.73 | | Twinelle Hopeson | (Archbishop Tennison School, Croydon) | 1 FINAL | Kingsmeadow Stadium | 13 May 2006 |
| 25.73/-2.0 | | Ashleigh Clarke | (Croydon Harriers) | 1 S-FINAL 2 | Kingsmeadow Stadium | 12 May 2012 |
| 25.73/0.0 | | Ella Rennie | (Herne Hill Harriers) | 1 FINAL | Kingsmeadow Stadium | 13 May 2023 |
|
25 performances of 25.73 or better. |