EVENT 333 Open/Male 13/15 Yrs 100m Breaststro - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 2 | Andrei Ierina | 13 | Kettering | |
| 4 | 4 | Oliver Trenwith | 13 | Corby | |
| 5 | 3 | Joseph Bird | 13 | Northampton | |
| 6 | 1 | Michal Kochanowicz | 13 | Corby | 1:38.90 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 6 | Aaryan Rana | 13 | Northampton | 1:38.77 |
| 2 | 8 | Alexander Stevenson | 14 | Nene Valley | 1:37.61 |
| 3 | 10 | David Rodrigues | 15 | Wellingboro | |
| 4 | 12 | Grayson Watford | 13 | Wellingboro | 1:37.37 |
| 5 | 11 | Jacob Quennell | 13 | Northampton | 1:41.27 |
| 6 | 9 | Oscar Venn | 14 | Northampton | 1:40.99 |
| 7 | 7 | Alex Lawrence | 13 | Daventry | 1:44.35 |
| 8 | 5 | Hugo Flikweert | 13 | Nene Valley | 1:40.24 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 16 | Linards Jermaks | 14 | Wellingboro | 1:37.19 |
| 2 | 22 | Lucas Poole | 14 | Northampton | 1:26.85 |
| 3 | 28 | James Oscroft | 13 | Northampton | 1:26.82 |
| 4 | 34 | Harry Langstone | 14 | Kettering | 1:25.65 |
| 5 | 31 | Daniel Mustata | 15 | Corby | 1:22.37 |
| 6 | 25 | Finley Stevenson | 15 | Corby | 1:27.97 |
| 7 | 19 | T Nedelcu-Paveliuc | 14 | Wellingboro | |
| 8 | 13 | Sui Chun Yip | 14 | Corby | 1:35.54 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Percy Green | 13 | Corby | 1:30.65 |
| 2 | 23 | Tommy Knipes | 15 | Northampton | 1:26.83 |
| 3 | 29 | Benjamin White | 15 | Rushden | 1:27.64 |
| 4 | 35 | Callum Taylor | 15 | Northampton | |
| 5 | 32 | Seth Gillies | 15 | Northampton | 1:27.58 |
| 6 | 26 | Aiden Horne | 14 | Corby | 1:32.01 |
| 7 | 20 | Charlie Husbands | 13 | Wellingboro | 1:35.42 |
| 8 | 14 | Freddie Jordan | 15 | Corby | 1:33.98 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 18 | Jeevan Bassi | 15 | Kettering | |
| 2 | 24 | Wojciech Latusek | 14 | Wellingboro | 1:30.47 |
| 3 | 30 | Kushal Mistry | 15 | Northampton | 1:24.21 |
| 4 | 36 | Jakub Siedlak | 15 | Corby | 1:18.71 |
| 5 | 33 | Ryan Doyle | 15 | Kettering | 1:28.94 |
| 6 | 27 | Kacper Siedlak | 13 | Corby | 1:29.35 |
| 7 | 21 | Cameron Hughes | 14 | Wellingboro | |
| 8 | 15 | Dmitrijs Bakulins | 15 | Wellingboro | 1:33.90 |