EVENT 210 Men 13/15 Yrs 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 5 | Laurenzio Ciolan | 13 | Northampton | 1:22.66 |
| 3 | 11 | Finley Emery | 14 | Rushden | 1:11.55 |
| 4 | 17 | Edun Rowe | 15 | Northampton | 1:04.30 |
| 5 | 14 | Jack Bignell | 15 | Northampton | 1:06.03 |
| 6 | 8 | Zachary Jones | 14 | Northampton | 1:16.43 |
| 7 | 2 | Noah Bielby | 13 | Kettering | 1:26.65 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 6 | Christopher Pablo | 15 | Wellingboro | 1:18.28 |
| 3 | 12 | Euan Swanson | 15 | Rushden | 1:10.70 |
| 4 | 18 | Aman Thethy | 15 | Rushden | 1:03.07 |
| 5 | 15 | Daniel Doyle | 15 | Kettering | 1:05.40 |
| 6 | 9 | Charlie Gibbs | 15 | Rushden | 1:15.40 |
| 7 | 3 | Maxim Kartavin | 14 | Corby | 1:24.26 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Zak Hesketh | 13 | Rushden | 1:29.21 |
| 2 | 7 | Edward Oscroft | 14 | Northampton | 1:17.16 |
| 3 | 13 | Jack Hurry | 14 | Northampton | 1:09.11 |
| 4 | 19 | M Vasconcellos-Blanch | 15 | Nene Valley | 59.12 |
| 5 | 16 | Ethan Soppett-Moss | 14 | Corby | 1:04.71 |
| 6 | 10 | Yogi Pateman | 15 | Wellingboro | 1:14.75 |
| 7 | 4 | Riley Woodward | 14 | Northampton | 1:24.00 |