EVENT 101 Open/Male 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 2 | Jacob DYER | 11 | Co Leeds | 7:40.00 |
| 1 | 4 | Oscar CALAM | 10 | Co Leeds | 7:08.30 |
| 2 | 6 | Barney HOBBS | 11 | Co Leeds | 6:50.36 |
| 3 | 8 | Zachary WHITTAKER | 10 | Co Leeds | 6:45.00 |
| 4 | 10 | Tyler RAVEN | 10 | Co Leeds | 6:27.43 |
| 5 | 9 | William PROUD | 12 | Middlesboro | 6:41.60 |
| 6 | 7 | Joshua MCMILLAN | 12 | Co Leeds | 6:50.20 |
| 7 | 5 | Matthew OGBUAGU | 11 | Co Leeds | 7:00.00 |
| 8 | 3 | George RICKETTS | 10 | Co Leeds | 7:16.80 |
| 9 | 1 | George KAYE | 11 | Donc Dartes | 7:40.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 12 | Adam SHIPLEY | 10 | Middlesboro | 6:15.60 |
| 1 | 14 | Alfie CRAGGS | 12 | Co Leeds | 6:12.40 |
| 2 | 16 | Hogan LAM | 12 | Co Leeds | 6:10.90 |
| 3 | 18 | Angus YOUNG | 12 | Co Leeds | 6:04.10 |
| 4 | 20 | Jensen HUGHES | 12 | Donc Dartes | 5:53.77 |
| 5 | 19 | Theo KEARSLEY | 14 | Donc Dartes | 5:58.60 |
| 6 | 17 | Jeffrey LANGE | 12 | Co Leeds | 6:06.20 |
| 7 | 15 | Abdullah MOKHLISSE | 14 | Chapeltown | 6:11.10 |
| 8 | 13 | Jacob JONES | 11 | Co Leeds | 6:14.20 |
| 9 | 11 | Olaf GRUDOWSKI | 12 | Co Leeds | 6:26.20 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 22 | Jacob NIXON | 12 | Middlesboro | 5:50.50 |
| 1 | 24 | Ethan REDDIVARI | 12 | Middlesboro | 5:43.00 |
| 2 | 26 | Alfie YOUNG | 14 | Co Leeds | 5:28.20 |
| 3 | 28 | Matthew JAMES | 15 | Co Leeds | 5:00.80 |
| 4 | 30 | Edward REDSHAW | 15 | Middlesboro | 4:52.30 |
| 5 | 29 | Joseph HALL | 15 | Co Leeds | 5:00.33 |
| 6 | 27 | Tin Ho CHEUNG | 15 | Co Leeds | 5:25.57 |
| 7 | 25 | Adam MOORE | 16 | Chapeltown | 5:35.73 |
| 8 | 23 | Lucas MORTON | 13 | Bo Barnsley | 5:50.00 |
| 9 | 21 | Benjamin WALKER | 16 | Stocksbridge | 5:50.97 |