EVENT 302 Boys 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Marius Bot | 10 | Leicester Ne | 2:10.00 |
| 3 | 2 | Kobe Carey | 12 | Leicester Ne | 2:06.31 |
| 4 | 3 | Liam Matthews | 12 | Rugby | 1:55.00 |
| 5 | 4 | Freddie Wall | 12 | Rugby | 1:50.00 |
| 6 | 5 | Andrew Blair | 11 | Co Leicester | 1:44.33 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 6 | Sina Mani | 14 | Kettering | 1:39.50 |
| 2 | 7 | Oliver Girvan | 15 | Modernian | 1:33.13 |
| 3 | 8 | Oliver Meier | 12 | Modernian | 1:30.29 |
| 4 | 9 | Oliver Davies | 13 | Co Leicester | 1:28.68 |
| 5 | 10 | Owen Rafferty | 14 | Bassetlaw SS | 1:27.14 |
| 6 | 11 | Maxwell Burdett | 10 | Co Leicester | 1:27.00 |
| 7 | 12 | Freddie Burdett | 12 | Co Leicester | 1:23.61 |
| 8 | 13 | Jeremiah Muir | 15 | Kettering | 1:22.40 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 14 | Harris Chacksfield | 17 | Kettering | 1:21.95 |
| 2 | 15 | Emerson-Blu Gupwell | 12 | Co Leicester | 1:21.62 |
| 3 | 16 | Sebastian Casey | 12 | Co Leicester | 1:20.44 |
| 4 | 17 | William Oxley | 12 | Co Leicester | 1:18.90 |
| 5 | 18 | Berkley Barnicoat | 13 | Modernian | 1:16.65 |
| 6 | 19 | Adam O'Neal | 14 | Modernian | 1:15.77 |
| 7 | 20 | Oliver Ashman | 12 | Co Leicester | 1:14.50 |
| 8 | 21 | Seth Hinitt | 16 | Bassetlaw SS | 1:13.50 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 22 | Gareon Gabatan | 14 | Rugby | 1:10.25 |
| 2 | 23 | Daniel Doyle | 14 | Kettering | 1:09.70 |
| 3 | 24 | Harry Fleet | 16 | Co Leicester | 1:08.80 |
| 4 | 25 | Connor White | 16 | Coalville | 1:08.39 |
| 5 | 26 | Cole Angell | 14 | Kettering | 1:08.28 |
| 6 | 27 | Yuriy Panteyev | 16 | Rugby | 1:08.06 |
| 7 | 28 | Layne Keyworth | 14 | Bassetlaw SS | 1:08.00 |
| 8 | 29 | Lewis Fitch | 15 | Co Leicester | 1:07.50 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 31 | Kris Moodley | 20 | NottmLeander | 1:07.38 |
| 2 | 33 | Daniel Meier | 15 | Modernian | 1:03.90 |
| 3 | 35 | Thomas Belcher | 19 | Modernian | 1:03.66 |
| 4 | 37 | James Annable | 16 | Kettering | 1:01.87 |
| 5 | 36 | Charlie James | 16 | Co Leicester | 1:02.62 |
| 6 | 34 | Lewis Cotterell | 16 | Co Leicester | 1:03.80 |
| 7 | 32 | Paul Page | 15 | Co Leicester | 1:04.93 |
| 8 | 30 | Ethan Ford | 15 | Co Leicester | 1:07.46 |