(1) | 52.02 | CBP | Herne Hill Harriers | | 1 FINAL | Carshalton | 12 September 2015 |
(2) | 52.27 | | Croydon Harriers A | | 1 FINAL | Carshalton | 2 September 2023 |
(3) | 53.14 | | Woking AC | | 1 FINAL | Carshalton | 7 September 2019 |
(4) | 53.32 | | Epsom & Ewell Harriers | | 2 FINAL | Carshalton | 7 September 2019 |
(5) | 53.50 | | Woking AC | | 1 FINAL | Carshalton | 8 September 2018 |
(6) | 53.67 | | Herne Hill Harriers 'A' | | 1 FINAL | Carshalton | 3 September 2022 |
(7) | 53.76 | | Herne Hill Harriers | | 2 FINAL | Carshalton | 2 September 2023 |
(8) | 53.88 | CBP | Herne Hill Harriers | | 1 FINAL | Carshalton | 13 September 2014 |
(9) | 53.89 | | Kingston AC & Polytechnic H | | 2 FINAL | Carshalton | 13 September 2014 |
(10) | 54.05 | | Guildford & Godalming AC 'A' | | 3 FINAL | Carshalton | 7 September 2019 |
(11) | 54.12 | | Guildford & Godalming AC 'A' | | 2 FINAL | Carshalton | 3 September 2022 |
(12) | 54.20 | | Sutton & District AC A | | 2 FINAL | Carshalton | 12 September 2015 |
(13) | 54.34 | | Croydon Harriers | | 2 FINAL | Carshalton | 8 September 2018 |
(14) | 54.44 | | Herne Hill Harriers | | 3 FINAL | Carshalton | 8 September 2018 |
(15) | 54.48 | | Herne Hill Harriers | | 1 FINAL | Carshalton | 10 September 2016 |
(16) | 54.5 | CBP | Mitcham & Sutton AC 'A' | | 1 HEAT 2 | Kingsmeadow Stadium | 22 September 1991 |
| 54.50 | | Herne Hill Harriers | | 1 FINAL | Carshalton | 9 September 2017 |
(18) | 54.6 | | Mitcham & Sutton AC 'A' | | 1 FINAL | Kingsmeadow Stadium | 22 September 1991 |
(19) | 55.00 | | Woking AC | | 3 FINAL | Carshalton | 12 September 2015 |
(20) | 55.03 | | Sutton & District 'A' | | 1 FINAL | Sutton Arena | 7 September 2013 |
(21) | 55.07 | | Herne Hill Harriers | | 1 FINAL | Carshalton | 11 September 2021 |
(22) | 55.12 | | Kingston AC & Polytechnic Harriers | | 2 FINAL | Carshalton | 11 September 2021 |
(23) | 55.19 | | Woking AC | | 3 FINAL | Carshalton | 11 September 2021 |
(24) | 55.20 | | Woking AC | | 3 FINAL | Carshalton | 3 September 2022 |
(25) | 55.22 | | Herne Hill Harriers | | 2 FINAL | Sutton Arena | 7 September 2013 |
(26) | 55.30 | | Guildford & Godalming AC 'A' | | 3 FINAL | Carshalton | 2 September 2023 |
(27) | 55.33 | | Sutton & District AC | | 2 FINAL | Carshalton | 10 September 2016 |
(28) | 55.47 | | Sutton & District AC 'A' | | 2 FINAL | Carshalton | 9 September 2017 |
(29) | 55.53 | | Sutton & District 'A' | | 3 FINAL | Carshalton | 13 September 2014 |
(30) | 55.54 | | Sutton & District AC | | 1 FINAL | Sutton Arena | 8 September 2012 |
(31) | 55.6 | | Herne Hill Harriers | | 2 HEAT 2 | Kingsmeadow Stadium | 22 September 1991 |
(32) | 55.64 | | Woking AC | | 3 FINAL | Carshalton | 9 September 2017 |
(33) | 55.73 | | Hercules Wimbledon AC | | 4 FINAL | Carshalton | 2 September 2023 |
(34) | 55.8 | | Epsom & Ewell Harriers 'A' | | 2 FINAL | Kingsmeadow Stadium | 22 September 1991 |
(35) | 55.99 | | Epsom & Ewell Harriers | | 5 FINAL | Carshalton | 2 September 2023 |
(36) | 56.0 | | Herne Hill Harriers | | 3 FINAL | Kingsmeadow Stadium | 22 September 1991 |
(37) | 56.1 | CBP | Epsom & Ewell Harriers 'A' | | 1 HEAT 1 | Kingsmeadow Stadium | 22 September 1991 |
(38) | 56.2 | | Sutton & District AC | | 1 FINAL | Sutton Arena | 11 September 1994 |
(39) | 56.24 | | Guildford & Godalming AC | | 3 FINAL | Sutton Arena | 7 September 2013 |
(40) | 56.41 | | Herne Hill Harriers 'A' | | 4 FINAL | Carshalton | 7 September 2019 |
(41) | 56.46 | | Woking AC | | 4 FINAL | Carshalton | 13 September 2014 |
(42) | 56.47 | | Kingston AC & Polytechnic Harriers | | 4 FINAL | Carshalton | 3 September 2022 |
(43) | 56.60 | | Sutton & District 'B' | | 5 FINAL | Carshalton | 13 September 2014 |
(44) | 56.7 | | Epsom & Ewell Harriers 'A' | | 1 FINAL | Kingsmeadow Stadium | 3 May 1992 |
(45) | 56.73 | | Sutton & District AC B | | 4 FINAL | Carshalton | 12 September 2015 |
(46) | 56.79 | | Guildford & Godalming AC 'B' | | 4 FINAL | Carshalton | 11 September 2021 |
(47) | 56.83 | | Kingston AC & Polytechnic Harriers | | 2 FINAL | Sutton Arena | 8 September 2012 |
(48) | 56.88 | | Hercules Wimbledon AC | | 5 FINAL | Carshalton | 7 September 2019 |
(49) | 56.96 | | Guildford & Godalming AC 'B' | | 6 FINAL | Carshalton | 2 September 2023 |
(50) | 57.37 | | Guildford & Godalming AC 'B' | | 5 FINAL | Carshalton | 3 September 2022 |
|
50 performances of 57.37 or better. |