|
400 Metres (Standard: 62.00) |
| 50.20 | 2 | Omari Carr-Miller | Croydon Harriers | Sheffield | 11 Jul | | |
| 51.69 | 2 | George Munt | Sutton & District AC | Bedford | 9 Aug | | |
| 52.97 | 4 | Jacob Paul | Epsom & Ewell Harriers | Ashford | 24 May | | |
| 53.0 | 1A | Lolu Olowole-Ojo | Epsom & Ewell Harriers | Lewes | 19 Jul | | |
| 53.54 | 4 | Theo Raynbird | Guildford & Godalming AC | Kingston | 13 Jun | | |
| 54.6 | 2 | Ben Brooks | Windsor, Slough, Eton & Hounslow AC | Woking | 24 May | | |
| 55.1 | 1A | Hugo Fleming | Walton AC | Walton | 31 May | | |
| 55.54 | 1B | Adeyinka Obadara | Croydon Harriers | Croydon | 21 Jun | | |
| 57.0 | 2 | Matthew Elmore | Kingston AC & Polytechnic Harriers | Kingston | 24 Jun | | |
| 57.0 | 1A | Callum Todd-Ferguson | Windsor, Slough, Eton & Hounslow AC | Woodford Grn | 19 Jul | | |
| 57.8 | 2A | Emmanuel Okwera | Herne Hill Harriers | Woking | 7 Jun | | |
| 57.81 | 1B | Taiwo Kamoju | Croydon Harriers | Croydon | 19 Jul | | |
| 57.9 | 3A | Harry Knights | Woking AC | Woking | 21 Jun | | |
| 58.1 | 1A | Tyrie Obuks | South London Harriers | Battersea Pk | 19 Jul | | |
| 58.19 | 2h2 | Patrick Lucas | Croydon Harriers | Woking | 6 Sep | | |
| 58.7 | 1B | Peter Chambers | Croydon Harriers | Woking | 7 Jun | | |
| 58.8 | 4 | Tom Mulligan | Oxted School | Crawley | 23 Apr | | |
| 58.8 | 1B | Harry Green | Epsom & Ewell Harriers | Ewell | 17 May | | |
| 59.0 | 3 | Hussain Zarei | Kingston AC & Polytechnic Harriers | Kingston | 24 Jun | | |
| 59.4 | 2A | Luis Da Silva | Herne Hill Harriers | Battersea | 21 Jun | | |
| 59.4 | 1B | Oliver Garner | StM Richmond | Kingston | 21 Jun | | |
| 59.4 | 1B | Oliver Weeks | Camberley & District AC | Oxford | 5 Jul | | |
| 59.9 | 2 | Tom Dawson | Kingston AC & Polytechnic Harriers | Kingston | 24 Jun | | |
| 60.32 | 1r1 | Ben Watson | Oxted School | Tonbridge | 7 Jul | | |
| 60.6 | 1B | Zach Weller-Davis | Herne Hill Harriers | Brighton | 31 May | | |
| 61.1 | | Ryan Midgley | Guildford & Godalming AC | Portsmouth | | | |
| 61.17 | 4h2 | Harry Ramsey | Dorking Mole Valley AC | Woking | 6 Sep | | |
| 61.4 | 5A | Jacob Rainier | Woking AC | Wormwood Scrubs | 19 Jul | | |
| 61.43 | 4h3 | Jonah Dykes | Winchester | Woking | 6 Sep | | |
| 61.5 | 1B | Tim Livingstone | Hercules Wimbledon AC | Sutton | 19 Jul | | |
| 61.55 | 5h2 | Cameron Starr | Sutton & District AC | Woking | 6 Sep | | |
| 61.7 | 3A | Adam Curran | Kingston AC & Polytechnic Harriers | Kingston | 5 Apr | | |