(1) | 52.19 | CBP | Jacob Paul | (Windsor, Slough, Eton & Hounslow AC) | 1 FINAL | Kingsmeadow Stadium | 26 May 2013 |
(2) | 53.25 | CBP | Jacob Paul | (Windsor, Slough, Eton & Hounslow AC) | 1 FINAL | Kingsmeadow Stadium | 13 May 2012 |
(3) | 53.65 | | Hayden Christian | (Guildford & Godalming AC) | 1 FINAL | Kingsmeadow Stadium | 14 May 2023 |
(4) | 54.33 | | Luke Dronfield | (Blackheath & Bromley Harriers AC) | 2 FINAL | Kingsmeadow Stadium | 14 May 2023 |
(5) | 54.5 | CBP | Gareth Lewis | ((Cheam HS)) | 1 FINAL | Wimbledon Park | 11 May 1997 |
(6) | 54.65 | | Tyri Donovan | (Windsor, Slough, Eton & Hounslow AC) | 1 FINAL | Kingsmeadow Stadium | 14 May 2017 |
(7) | 54.8 | | Austin Ferns | (Belgrave Harriers) | 1 FINAL | Kingsmeadow Stadium | 9 May 1998 |
(8) | 54.9 | | Austin Ferns | (Belgrave Harriers) | 1 FINAL | Kingsmeadow Stadium | 8 May 1999 |
| 54.90 | | Lolu Oluwole-Ojo | (Windsor, Slough, Eton & Hounslow AC) | 2 FINAL | Kingsmeadow Stadium | 26 May 2013 |
(10) | 55.29 | | Alex O'Callaghan-Brown | (Blackheath & Bromley Harriers AC) | 1 FINAL | Kingsmeadow Stadium | 12 May 2019 |
|
10 performances of 55.29 or better. |