EVENT 306 Boys Open 200m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Isaac FOY | 11 | Co Leeds | 3:31.38 |
| 4 | 3 | George WOODS | 10 | Co Leeds | 3:10.00 |
| 5 | 2 | Asher MAXFIELD | 11 | Co Leeds | 3:10.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 5 | Miles KINLEN | 12 | Co Sheffield | 3:02.61 |
| 1 | 7 | Thomas MILNER | 12 | Co Leeds | 2:58.00 |
| 2 | 9 | Theodore ROSENBERG | 12 | Co Leeds | 2:43.53 |
| 3 | 11 | Oliver WHITTLESTON | 12 | Co Leeds | 2:36.50 |
| 4 | 13 | Solomon HODGSON | 13 | Co Leeds | 2:33.90 |
| 5 | 12 | Jad IDRIS | 13 | Co Leeds | 2:35.60 |
| 6 | 10 | George BROOKS | 12 | Co Leeds | 2:41.40 |
| 7 | 8 | Oscar TAYLOR | 14 | Grimsby AST | 2:48.00 |
| 8 | 6 | Oliver JOHNSON | 13 | Grimsby AST | 2:58.83 |
| 9 | 4 | Samuel EADES | 11 | Co Sheffield | 3:07.30 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 15 | Max RUSSELL | 13 | Co Sheffield | 2:31.30 |
| 1 | 17 | Thomas WILKINSON | 13 | Co Sheffield | 2:26.10 |
| 2 | 19 | James ROBINSON | 14 | Co Leeds | 2:21.00 |
| 3 | 21 | Harry MILNER | 15 | Co Leeds | 2:17.28 |
| 4 | 23 | Emilio PANIAGUA-GUTIER | 15 | Co Leeds | 2:14.75 |
| 5 | 22 | Dalton CLAPHAM | 16 | Co Leeds | 2:16.12 |
| 6 | 20 | Joshua SPENCER | 30 | York City | 2:20.00 |
| 7 | 18 | Cameron GREEN | 14 | Co Leeds | 2:26.04 |
| 8 | 16 | Henry FIRTH | 14 | Co Leeds | 2:27.64 |
| 9 | 14 | Adam SEDDON | 15 | Oldham Aqua | 2:32.56 |