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| 1500 Metres (Standard: 4:55.00) |
| | 3:55.33 | | Will Barnicoat | Windsor, Slough, Eton & Hounslow AC | Eton | 6 Jul | | |
| | 3:55.42 | | Dylan Spencer | Windsor, Slough, Eton & Hounslow AC | Watford | 29 Jun | | |
| | 4:01.72 | | Jack Dickson | Kingston AC & Polytechnic Harriers | Eltham | 19 Jun | | |
| | 4:04.55 | | Cameron Enser | Bracknell AC | Watford | 21 Aug | | |
| | 4:05.03 | | Felix Vaughan (U16) | South London Harriers | Chelmsford | 21 Jul | | |
| | 4:07.05 | | Harley Norman | South London Harriers | Coulsdon | 24 Apr | | |
| | 4:07.91 | | Alfie Spear (U16) | Windsor, Slough, Eton & Hounslow AC | Watford | 29 May | | |
| | 4:08.58 | | Adam Hudson (U16) | Sutton & District AC | Watford | 21 Aug | | |
| | 4:08.96 | | Matty Smith (U16) | Horsham Blue Star Harriers | Watford | 26 Jun | | |
| | 4:12.38 | 12r10 | Charlie Wagstaff (U16) | Aldershot, Farnham & District AC | Watford | 29 May | | |
| | 4:15.95 | | Spencer Bateman (U16) | Sutton & District AC | Brighton | 29 May | | |
| | 4:15.99 | | Ed Henderson (U16) | Windsor, Slough, Eton & Hounslow AC | Swansea | 12 May | | |
| | 4:16.6 | | Thomas James (U16) | Crawley AC | Harrow | 13 Jul | | |
| | 4:17.83 | | Ross Hurst (U16) | Walton AC | Watford | 24 Jul | | |
| | 4:18.0 | | Jack Gemmell (U16) | Walton AC | Eltham | 17 Jul | | |
| | 4:18.19 | 3 | Jack Burton | South London Harriers | Kingston | 12 May | | |
| | 4:18.56 | | Charlie Krammer | Herne Hill Harriers | Wimbledon Park | 7 Apr | | |
| | 4:18.6 | | Liam Stone (U16) | Windsor, Slough, Eton & Hounslow AC | Uxbridge | 7 Jul | | |
| | 4:19.07 | | Jacob Harrison (U16) | South London Harriers | Wimbledon Park | 7 Apr | | |
| | 4:19.9 | | Tom Jones | Walton AC | Walton | 19 May | | |
| | 4:20.8 | | Theo Cheshire (U16) | Guildford & Godalming AC | Reading | 15 Sep | | |
| | 4:22.37 | | Nicholas Smith | South London Harriers | Carshalton | 30 Mar | | |
| | 4:23.6 | | Benjamin Harrison (U16) | South London Harriers | Kingston | 13 Jul | | |
| | 4:25.00 | | Theo Lewis | Sutton & District AC | Brighton | 29 May | | |
| | 4:25.54 | | Tom Armstrong (U16) | Ranelagh Harriers | Wormwood Scrubs | 1 May | | |
| | 4:25.76 | 7 | Joseph Daws-Twilley (U16) | Walton AC | Kingston | 12 May | | |
| | 4:26.3 | | Raphael Rivero-Stevenet (U16) | Guildford & Godalming AC | Hillingdon | 7 Jul | | |
| | 4:26.6 | | Tom Chandler (U16) | Windsor, Slough, Eton & Hounslow AC | Uxbridge | 7 Jul | | |
| | 4:26.7 | | Morgan Rennie (U16) | Hercules Wimbledon AC | Guildford | 15 Jun | | |
| | 4:26.9 | | Alex Dunn (U16) | Sutton & District AC | Lewes | 15 Jun | | |
| | 4:27.18 | 8 | Olly Wilson | Kingston AC & Polytechnic Harriers | Kingston | 12 May | | |
| | 4:27.99 | | Ben Palmer | Walton AC | Watford | 26 Jun | | |
| | 4:28.19 | | Owen Waite | South London Harriers | Coulsdon | 4 Sep | | |
| | 4:28.84 | | Max Duckworth (U16) | Aldershot, Farnham & District AC | Kingston | 8 Jun | | |
| | 4:29.58 mx | | Christopher Baker (U16) | Windsor, Slough, Eton & Hounslow AC | Watford | 24 Jul | | |
| | 4:32.28 | | Barney Jackman (U16) | Aldershot, Farnham & District AC | Tooting Bec | 13 Apr | | |
| | 4:32.78 | | Sam Martin | Guildford & Godalming AC | Guildford | 30 Jun | | |
| | 4:33.25 | | Henry Smith | Epsom & Ewell Harriers | Coulsdon | 24 Apr | | |
| | 4:33.88 | | Michael Webb-Bourne (U16) | Kingston AC & Polytechnic Harriers | Croydon | 19 May | | |
| | 4:34.28 | | Nick Marshall | Croydon Harriers | Basingstoke | 17 Aug | | |
| | 4:35.1 | | Aaron Gill | Aldershot, Farnham & District AC | Aldershot | 3 Aug | | |
| | 4:35.3 | | Christopher Baker (U16) | Windsor, Slough, Eton & Hounslow AC | Uxbridge | 7 Jul | | |
| | 4:35.6 | | Shaun Waters | Woking AC | Andover | 7 Jul | | |
| | 4:35.8 | | Finlay Kirk (U16) | Windsor, Slough, Eton & Hounslow AC | Uxbridge | 7 Jul | | |
| | 4:36.63 | | Hector Revill | Hercules Wimbledon AC | Wimbledon Park | 7 Apr | | |
| | 4:37.62 | | Sam Camenzuli | Herne Hill Harriers | Guildford | 30 Jun | | |
| | 4:38.2 | | Edward Newton (U16) | Hercules Wimbledon AC | Wimbledon Park | 19 May | | |
| | 4:38.89 | | Charlie Turner | Windsor, Slough, Eton & Hounslow AC | Eton | 19 May | | |
| | 4:39.62 | | Daniel Evans | Dorking Mole Valley AC | Bromley | 13 Apr | | |
| | 4:40.18 | | Patrick Brown (U16) | Aldershot, Farnham & District AC | Kingston | 8 Jun | | |
| | 4:42.5 | | Ben West (U16) | Waverley Harriers | Guildford | 9 Jun | | |
| | 4:42.7 | | Frank Townley | Woking AC | Horspath | 16 Jun | | |
| | 4:44.41 mx | | Isaac Wong (U16) | Windsor, Slough, Eton & Hounslow AC | Watford | 29 May | | |
| | 4:45.11 | | George Asprey | Aldershot, Farnham & District AC | Exeter | 22 Sep | | |
| | 4:47.37 | | Aiken Furlong | Herne Hill Harriers | Battersea Park | 8 Jun | | |
| | 4:50.2 | | Adam Kirby | Guildford & Godalming AC | Reading | 15 Sep | | |
| | 4:51.79 | | Harvey McAndrew (U16) | Walton AC | Watford | 26 Jun | | |
| | 4:52.2 | | William Stark | Walton AC | Walton | 5 May | | |
| | 4:54.8 | | Charlie Cunningham | Woking AC | Eton | 13 Apr | | |
| | 4:54.9 | | Theo Flanagan | Croydon Harriers | Croydon | 22 May | | |