EVENT 804 Boys Open 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Gus FRASER | 12 | Winsford | 6:36.97 |
| 4 | 3 | Daniel FRENCH | 12 | Wirral Metro | 6:15.79 |
| 5 | 2 | Jasper DE GLOPPER | 12 | Warrington W | 6:18.61 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Harry JONES | 13 | Winsford | 6:14.56 |
| 2 | 6 | Corey OWENS | 13 | Stockport Mo | 5:56.82 |
| 3 | 8 | Thomas RICKELS | 12 | Winsford | 5:51.95 |
| 4 | 10 | Ciaran TURNER | 14 | Winsford | 5:40.58 |
| 5 | 9 | Euan FLANNERY | 14 | Warrington W | 5:43.59 |
| 6 | 7 | Adam GLOYNE-PHILLIPS | 14 | Co Chester | 5:56.78 |
| 7 | 5 | George PEARCE | 12 | Winsford | 6:07.23 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 12 | Jack HARMER | 15 | Satellite | 5:31.90 |
| 2 | 14 | Edward MA | 14 | Winsford | 5:29.01 |
| 3 | 17 | George DENHAM-EVERETT | 16 | Satellite | 5:24.28 |
| 4 | 19 | Alex RIX | 16 | Warrington W | 5:20.38 |
| 5 | 18 | Henry BALL | 15 | Winsford | 5:22.87 |
| 6 | 15 | Lewis BARRATT | 16 | Co Chester | 5:26.46 |
| 7 | 13 | Thomas HILTON | 16 | Warrington W | 5:30.88 |
| 8 | 11 | Christopher JAMIESON | 14 | Bebington | 5:38.01 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 21 | Daniel HILTON | 17 | Warrington W | 5:18.78 |
| 2 | 23 | Jackson DILLON | 16 | Warrington W | 5:15.29 |
| 3 | 25 | William LINE | 16 | Winsford | 5:09.77 |
| 4 | 27 | Thomas DENHAM-EVERETT | 19 | Satellite | 5:07.49 |
| 5 | 26 | Josh PINDER | 16 | Warrington W | 5:09.23 |
| 6 | 24 | George DAINTITH | 15 | Warrington W | 5:11.40 |
| 7 | 22 | Thomas BIDGOOD | 14 | Satellite | 5:15.84 |
| 8 | 20 | Simon HARRISON | 15 | Satellite | 5:19.60 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 29 | Henry TAYLOR | 15 | Stockport Mo | 5:04.86 |
| 2 | 32 | Jack WHITE | 17 | Warrington W | 5:01.55 |
| 3 | 35 | Adam WRIGHT | 17 | Winsford | 4:50.50 |
| 4 | 37 | Joseph ASHLEY | 15 | Warrington W | 4:43.10 |
| 5 | 36 | Lewis TURNER | 17 | Winsford | 4:45.21 |
| 6 | 34 | Berdan ORDEK | 15 | Warrington W | 4:53.73 |
| 7 | 30 | Andrew DOBBING | 18 | Bebington | 5:04.30 |
| 8 | 28 | Reagan YOUNG | 15 | Wirral Metro | 5:07.31 |