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| 800 Metres (Standard: 2:28.00) |
| | 2:02.84 | | Ted Enser | Bracknell AC | Watford | 12 Jun | | |
| | 2:03.36 | | Oliver Pickup | Aldershot, Farnham & District AC | Watford | 12 Jun | | |
| | 2:05.89 mx | 1rB | Zachary Crowther (U14) | Herne Hill Harriers | Tooting Bec | 29 Jun | | |
| | 2:07.73 | | Harvey Kande | Herne Hill Harriers | Millfield | 4 May | | |
| | 2.07.9 | 1A | Zac Crowther (U14) | Herne Hill Harriers | Coulsdon | 14 Jul | | |
| | 2:09.2 | | Ben Shepherd (U14) | Walton AC | Bournemouth | 22 Jun | | |
| | 2:09.36 | | Chukwuebuka Nkamuo | Croydon Harriers | Bromley | 20 Jul | | |
| | 2:10.2 | | Sam Hinton | Guildford & Godalming AC | Brighton | 23 Jun | | |
| | 2.10.2 | 2A | Ebuka Nkamuo | Croydon Harriers | Coulsdon | 14 Jul | | |
| | 2:10.52 | 5 | Leon Lafreniere | Woking AC | Kingston | 12 May | | |
| | 2:10.6 | | Ethan Scott | Windsor, Slough, Eton & Hounslow AC | Uxbridge | 7 Jul | | |
| | 2:10.77 | | James Winship | Bracknell AC | Watford | 15 May | | |
| | 2.11.1 | 3A | Hayden Gale (U14) | Epsom & Ewell Harriers | Coulsdon | 14 Jul | | |
| | 2:11.2 | | Sam Nesbitt | Ranelagh Harriers | Poole | 18 May | | |
| | 2:12.31 | | Samuel Mowa (U14) | Croydon Harriers | Bromley | 20 Jul | | |
| | 2:12.39 | | Christopher Vaughan | Walton AC | Eton | 20 Jul | | |
| | 2:12.8 | | James Dargan (U14) | Camberley & District AC | Reading | 15 Sep | | |
| | 2:13.04 | | Josh Punton | Walton AC | Eton | 20 Jul | | |
| | 2:13.2 | | Jack Westerman | Guildford & Godalming AC | Guildford | 20 Jul | | |
| | 2:13.4 | | Evan Cowell-New (U14) | Herne Hill Harriers | Reading | 23 Jun | | |
| | 2.13.4 | ns | Dylan Sweet (U17) | Herne Hill Harriers | Coulsdon | 14 Jul | | |
| | 2:13.85 | 3h2 | Oscar Curry | Reigate Priory AC | Kingston | 11 May | | |
| | 2:14.0 | | Martin Sunderland | Woking AC | Winchester | 18 May | | |
| | 2.14.0 | ns | Justin Moore | Dorking Mole Valley AC | Coulsdon | 14 Jul | | |
| | 2.14.2 | 1A | Finn Punton | Walton AC | Coulsdon | 14 Jul | | |
| | 2:14.30 | | Christo Chilton (U14) | South London Harriers | Carshalton | 30 Mar | | |
| | 2:14.6 | | Miles Brooks | Camberley & District AC | Reading | 15 Sep | | |
| | 2:14.61 mx | | Toby Spencer (U14) | Windsor, Slough, Eton & Hounslow AC | Basingstoke | 17 Jul | | |
| | 2:15.45 | | Oliver Emment | Walton AC | Watford | 15 May | | |
| | 2:15.9 | | Edward Andrews | St Mary's Richmond AC | Harrow | 27 Apr | | |
| | 2.16.50 | | Chizoba Carl Nkamuo | Croydon Harriers | Bromley | 20 Jul | | |
| | 2:16.57 | | Sam Johnston (U14) | Windsor, Slough, Eton & Hounslow AC | Eton | 20 Jul | | |
| | 2:16.6 | | Morgan Mkambula (U14) | Camberley & District AC | Hillingdon | 7 Jul | | |
| | 2:16.60 | | Teddy Gannon (U14) | Woking AC | Ashford | 17 Aug | | |
| | 2:16.9 | | Luke Stanton | Camberley & District AC | Guildford | 9 Jun | | |
| | 2:17.45 | | Dante Clarke (U14) | Herne Hill Harriers | Basingstoke | 22 Jun | | |
| | 2:17.68 | | Diego Lister (U14) | Herne Hill Harriers | Bromley | 20 Jul | | |
| | 2:18.45 | | Dhruv Simmonite | Kingston AC & Polytechnic Harriers | Eton | 20 Jul | | |
| | 2:19.3 | | Hayden Ashworth (U14) | Camberley & District AC | Aldershot | 3 Aug | | |
| | 2:19.60 mx | 4r7 | Connor Foley (U14) | Hercules Wimbledon AC | Watford | 10 Jul | | |
| | 2:19.7 | 4A | Daniel Slaven (U14) | Epsom & Ewell Harriers | Ewell | 2 Jun | | |
| | 2.19.7 | 5A | Connor Foley (U14) | Kingston AC & Polytechnic Harriers | Coulsdon | 14 Jul | | |
| | 2:20.1 | | Miles Brown | Holland Sports AC | Carshalton | 5 May | | |
| | 2:20.1 | | William Belton | Hercules Wimbledon AC | Tooting Bec | 20 Jul | | |
| | 2:20.4 | | Finn Canning | Windsor, Slough, Eton & Hounslow AC | Uxbridge | 7 Jul | | |
| | 2:20.6 | 5A | Brandan Morrell | South London Harriers | Ewell | 2 Jun | | |
| | 2:20.7 | | Rudi Morrell | Aldershot, Farnham & District AC | Winchester | 18 May | | |
| | 2:20.92 | | Thomas Beare (U14) | Hercules Wimbledon AC | Watford | 17 Apr | | |
| | 2:21.02 | 4h3 | Toby Spencer (U14) | Windsor, Slough, Eton & Hounslow AC | Kingston | 11 May | | |
| | 2:21.16 mx | 4r2 | Sonny Breeze | S Factor Athletics | Hendon | 27 Jul | | |
| | 2:21.4 | 3B | Joe Barker (U14) | Epsom & Ewell Harriers | Ewell | 2 Jun | | |
| | 2:21.5 | | Oliver Palmer | Kingston AC & Polytechnic Harriers | Bournemouth | 22 Jun | | |
| | 02:21.57 | 3h1 | Tom Beare (U14) | Hercules Wimbledon AC | Kingston | 11 May | | |
| | 2.22.0 | 1B | Harry Tuckman (U14) | Walton AC | Coulsdon | 14 Jul | | |
| | 2:22.47 | P | Michael Warne | Holland Sports AC | Carshalton | 7 Sep | | |
| | 2:22.7 | | Daniel Wass (U14) | Woking AC | Winchester | 18 May | | |
| | 2:23.09 | | Sam Atkins (U14) | Kingston AC & Polytechnic Harriers | Eton | 20 Jul | | |
| | 2:23.3 | | Charlie White (U14) | Kingston AC & Polytechnic Harriers | Carshalton | 5 May | | |
| | 2:23.73 | 7h2 | Sonny Breeze | S Factor Athletics | Kingston | 11 May | | |
| | 2:23.78 | | Tom Wilson (U14) | Kingston AC & Polytechnic Harriers | Crawley | 10 Jul | | |
| | 2:24.30 | 6h3 | Noah Laird (U14) | Holland Sports AC | Kingston | 11 May | | |
| | 2:25.7 | | Martin van Domselaar | South London Harriers | Coulsdon | 28 Jul | | |
| | 2:26.07 | | Tom Street | Hercules Wimbledon AC | Basingstoke | 22 Jun | | |
| | 2:26.49 mx | 3r3 | Gus Lewis (U14) | Reigate Priory AC | Dartford | 24 Jul | | |
| | 2:26.6 | 2B | Gus Lewis (U14) | Dorking Mole Valley AC | Ewell | 2 Jun | | |
| | 2:26.82 | | Adam Hammadi | Hercules Wimbledon AC | Tooting Bec | 6 May | | |
| | 2:27.0 | | Indraneel Kandlagunta | Slough Junior AC | Winchester | 7 Jul | | |
| | 2:27.2 | | David Aisa Miller | Herne Hill Harriers | Tooting Bec | 27 Apr | | |
| | 2:27.46 mx | 7rD | Robin Bebbington (U14) | Herne Hill Harriers | Tooting Bec | 29 Jun | | |
| | 2:27.6 | | Tobie Dawe (U14) | Camberley & District AC | Winchester | 18 May | | |