EVENT 401 Boy Open 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Liam LYONS | 12 | Derventio | 6:50.02 |
| 3 | 3 | Oliver KEENS | 12 | Rotherham Mo | 6:45.00 |
| 4 | 2 | Evan JOHNSON | 12 | Derventio | 6:50.01 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 5 | Joshua BOOTH | 13 | Rotherham Mo | 6:00.00 |
| 3 | 7 | Jack FINNIE | 14 | Rotherham Mo | 5:21.28 |
| 4 | 6 | William BLAINEY | 13 | Newcastle St | 5:56.09 |
| 5 | 4 | Harry OSBORNE | 10 | Rotherham Mo | 6:30.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 9 | Zachariah DALE | 14 | Newcastle St | 5:14.94 |
| 2 | 11 | Leo ALLANSON | 15 | Derventio | 4:56.06 |
| 3 | 13 | Callum KETTLEWELL | 17 | Bassetlaw SS | 4:49.47 |
| 4 | 12 | Cillian MCGUINNESS | 16 | Bassetlaw SS | 4:55.24 |
| 5 | 10 | Harry CARDELL | 17 | Deepings | 5:14.74 |
| 6 | 8 | Harry BRANCHAM | 15 | Bassetlaw SS | 5:17.09 |