EVENT 101 Open/Male 800m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Dylan Seelig | 12 | Northampton | 13:35.10 |
| 4 | 3 | Max Russell | 12 | Nene Valley | 13:00.00 |
| 5 | 2 | Henry Raitt | 12 | Corby | 13:02.80 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 5 | Hugo Flikweert | 13 | Nene Valley | 12:40.00 |
| 3 | 7 | Noah Patterson | 13 | Corby | 12:07.00 |
| 4 | 9 | Dominiks Kupcovs | 12 | Daventry | 12:03.60 |
| 5 | 8 | Alexander Stevenson | 14 | Nene Valley | 12:05.10 |
| 6 | 6 | Alex Lawrence | 13 | Daventry | 12:23.78 |
| 7 | 4 | William Stevenson | 12 | Nene Valley | 12:48.20 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Seth Gillies | 15 | Northampton | 11:57.34 |
| 2 | 13 | George Brotherston | 16 | Wellingboro | 11:35.70 |
| 3 | 15 | Oscar Pawlowski | 12 | Corby | 11:27.70 |
| 4 | 17 | Kushal Mistry | 15 | Northampton | 11:18.31 |
| 5 | 16 | Elliott Thomson | 14 | Daventry | 11:22.95 |
| 6 | 14 | Bryn Sensecall | 12 | Daventry | 11:35.10 |
| 7 | 12 | Henry Richards | 12 | Northampton | 11:52.30 |
| 8 | 10 | Dorian Marafko | 16 | Corby | 12:01.20 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 19 | Sui Chun Yip | 14 | Corby | 11:10.00 |
| 2 | 21 | Benjamin White | 15 | Rushden | 11:06.20 |
| 3 | 23 | Joseph Bird | 13 | Northampton | 11:02.50 |
| 4 | 25 | Oliver Trenwith | 13 | Corby | 10:48.30 |
| 5 | 24 | Aidan Penney | 16 | Wellingboro | 11:01.28 |
| 6 | 22 | Callum Taylor | 15 | Northampton | 11:06.14 |
| 7 | 20 | James Oscroft | 13 | Northampton | 11:07.77 |
| 8 | 18 | Jesunefe Abeke | 16 | Corby | 11:16.20 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 27 | Aaron Mountford | 16 | Wellingboro | 10:39.20 |
| 2 | 29 | Jacob Quennell | 13 | Northampton | 10:36.80 |
| 3 | 31 | Dylan Bielby | 18 | Kettering | 10:33.68 |
| 4 | 33 | Matthew Kemp | 16 | Wellingboro | 10:25.10 |
| 5 | 32 | Alexandru Ierina | 16 | Corby | 10:31.80 |
| 6 | 30 | Jamie Mason | 17 | Corby | 10:33.90 |
| 7 | 28 | Tommy Knipes | 15 | Northampton | 10:37.20 |
| 8 | 26 | Oscar Cutmore | 13 | Corby | 10:47.30 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 35 | Oliver Dovey | 16 | Corby | 9:58.05 |
| 2 | 37 | Louis Pell | 15 | Northampton | 9:52.70 |
| 3 | 39 | Edward Oscroft | 17 | Northampton | 9:45.26 |
| 4 | 41 | Aryan Nath | 17 | Corby | 9:35.27 |
| 5 | 40 | Oliver Horne | 17 | Corby | 9:42.50 |
| 6 | 38 | Daniel Mustata | 15 | Corby | 9:47.50 |
| 7 | 36 | Oscar Venn | 14 | Northampton | 9:56.80 |
| 8 | 34 | Wojciech Walach | 16 | Corby | 10:00.00 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 43 | Jack Hurry | 17 | Northampton | 9:25.32 |
| 2 | 45 | David Bielawski | 17 | Northampton | 9:06.00 |
| 3 | 47 | Laurenzio Ciolan | 16 | Corby | 8:50.90 |
| 4 | 49 | Edun Rowe | 18 | Northampton | 8:28.30 |
| 5 | 48 | Sam Brylka | 17 | Corby | 8:37.70 |
| 6 | 46 | Jack Bignell | 18 | Northampton | 8:59.08 |
| 7 | 44 | Riley Woodward | 17 | Northampton | 9:12.00 |
| 8 | 42 | Finley Dare | 17 | Corby | 9:29.82 |