|
400 Metres (Standard: 55.00) |
| 48.31 | 3p2 | Lolu Oluwole-Ojo | Windsor, Slough, Eton & Hounslow AC | Oordegem, BEL | 1 Jun | | |
| 49.64 | 1A | Jonathan Osbourne | Blackheath & Bromley Harriers AC | Kingston | 13 Jul | | |
| 50.37 | 1r2 | Jamal Rhoden-Stevens | Herne Hill Harriers | Crystal Palace | 1 May | | |
| 50.6 | 3A | Chris McAlister | Sutton & District AC | Abingdon | 18 May | | |
| 51.19 | 3r1 | Patrick Lucas | Croydon Harriers | Bromley | 12 Aug | | |
| 51.33 | 5A | Joe Yarde | Windsor, Slough, Eton & Hounslow AC | Basildon | 28 Apr | | |
| 51.7 | 3 | Vladimir Woodham-Smith | Belgrave Harriers | Battersea Park | 3 Jul | | |
| 52.3 | 2B | Alex Hobbs | Guildford & Godalming AC | Guildford | 30 Jun | | |
| 52.4 | 2ns | Johnoi Josephs | Sutton & District AC | Kingston | 27 Apr | | |
| 52.43 | 4r8 | Tom Butcher | Guildford & Godalming AC | Watford | 21 Aug | | |
| 52.69 | 4r1 | Chris Threadgold | Belgrave Harriers | Crystal Palace | 4 Sep | | |
| 53.08 | 4r2 | Rob Hall | Aldershot, Farnham & District AC | Woking | 7 Aug | | |
| 53.16 | 4 | Jacob Rainier | Aldershot, Farnham & District AC | Kingston | 25 May | | |
| 53.19 | 3r2 | George Huxley | Ashford AC | Canterbury | 17 Jul | | |
| 53.26 | 2B | Calum Roots | Guildford & Godalming AC | Eton | 15 Jun | | |
| 53.30 | 2A | Max Davis | Camberley & District AC | Aldershot | 2 Jun | | |
| 53.97 | 5r7 | Jake Hollins | Guildford & Godalming AC | Watford | 21 Aug | | |
| 53.98 | 5 | Connor Thomas | Herne Hill Harriers | Kingston | 25 May | | |
| 54.0 | 1A | Nikolaj Schubert | Kingston AC & Polytechnic Harriers | Bromley | 28 Apr | | |
| 54.0 | 3A | Toby Borthwick | Guildford & Godalming AC | Guildford | 4 May | | |
| 54.06 | 6 | Asher Nelson | Kingston AC & Polytechnic Harriers | Kingston | 25 May | | |
| 54.97 | 1r4 | Kertis Beswick | Blackheath & Bromley Harriers AC | Crawley | 14 Apr | | |