EVENT 201 Open/Male 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Toby BIGWOOD | 9 | Blackburn | 7:53.70 |
| 4 | 3 | Fraser GALBRAITH | 10 | Co Leeds | 7:07.76 |
| 5 | 2 | Matas SUMSKAS | 15 | Lancaster | 7:13.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Theo SIRA | 11 | Co Leeds | 7:03.90 |
| 2 | 7 | Lewis LUNG | 11 | Co Leeds | 7:00.00 |
| 3 | 9 | Matthew OGBUAGU | 12 | Co Leeds | 6:47.66 |
| 4 | 11 | Yin Ho Adrian CHAN | 10 | Co Leeds | 6:37.10 |
| 5 | 10 | Ellis HARGREAVES | 12 | Co Leeds | 6:41.15 |
| 6 | 8 | Samuel FORD | 10 | Co Leeds | 6:49.64 |
| 7 | 6 | David GRIGORE | 11 | Co Leeds | 7:00.00 |
| 8 | 4 | Zac PHILLIPS | 10 | Co Leeds | 7:05.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 13 | Harley GILL | 12 | Co Leeds | 6:20.00 |
| 1 | 15 | Stephen GITTINS | 13 | Stokesley | 6:05.15 |
| 2 | 17 | Oliver BARKER | 11 | Co Leeds | 6:03.87 |
| 3 | 19 | Harrison WAKE | 12 | Co Leeds | 5:58.90 |
| 4 | 21 | Mikey FARREN | 14 | Scunthorpe A | 5:56.90 |
| 5 | 20 | Tristan PICKARD | 12 | RichmondDale | 5:58.00 |
| 6 | 18 | George KING | 12 | Co Leeds | 6:00.10 |
| 7 | 16 | Liam LI | 10 | Co Leeds | 6:05.00 |
| 8 | 14 | Euan CARMODY | 11 | Co Leeds | 6:17.30 |
| 9 | 12 | George GITTINS | 11 | Stokesley | 6:28.55 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 23 | Samuel HIGGINBOTTOM | 12 | Lancaster | 5:53.56 |
| 1 | 25 | Demilade AYEMOWA | 14 | Co Leeds | 5:48.43 |
| 2 | 27 | Jacob JONES | 12 | Co Leeds | 5:43.50 |
| 3 | 29 | Olaf GRUDOWSKI | 13 | Co Leeds | 5:40.40 |
| 4 | 31 | Callum FOZARD | 13 | Co Leeds | 5:35.90 |
| 5 | 30 | Jeffrey LANGE | 13 | Co Leeds | 5:37.00 |
| 6 | 28 | Alfie CRAGGS | 13 | Co Leeds | 5:40.70 |
| 7 | 26 | Oscar O'DONNELL | 12 | Co Leeds | 5:45.45 |
| 8 | 24 | Joshua CROZIER | 15 | RichmondDale | 5:50.00 |
| 9 | 22 | Oliver JOHNSON | 13 | RichmondDale | 5:55.20 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 33 | Jacob SMYTH | 16 | Eckington | 5:35.00 |
| 1 | 35 | Oliver ATHA | 13 | Co Leeds | 5:31.60 |
| 2 | 37 | Leo LI | 12 | Co Leeds | 5:27.73 |
| 3 | 39 | Oliver BARRETT | 13 | Co Leeds | 5:24.30 |
| 4 | 41 | William DUNN | 13 | Co Leeds | 5:19.50 |
| 5 | 40 | William NICHOLS | 16 | RichmondDale | 5:19.70 |
| 6 | 38 | Noah DARNELL | 13 | Co Leeds | 5:26.20 |
| 7 | 36 | Angus YOUNG | 13 | Co Leeds | 5:31.30 |
| 8 | 34 | William LANCASHIRE | 14 | Co Leeds | 5:33.89 |
| 9 | 32 | Alfie YOUNG | 15 | Co Leeds | 5:35.07 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 43 | James THOMSON | 15 | Co Leeds | 5:12.20 |
| 1 | 45 | Thomas BINNS | 17 | Burnley BOBC | 5:00.89 |
| 2 | 47 | Luke DYER | 17 | Co Leeds | 4:58.30 |
| 3 | 49 | Patrick O'HARA | 14 | Co Leeds | 4:56.90 |
| 4 | 51 | Arthur OWENS | 15 | Co Leeds | 4:48.30 |
| 5 | 50 | Matthew JAMES | 16 | Co Leeds | 4:48.70 |
| 6 | 48 | William WILSON | 14 | Co Leeds | 4:57.60 |
| 7 | 46 | Owen CARMODY | 14 | Co Leeds | 5:00.10 |
| 8 | 44 | Connor MCCULLEN | 14 | Co Leeds | 5:03.70 |
| 9 | 42 | Jacob O'DONNELL | 14 | Co Leeds | 5:13.80 |