EVENT 401 Open/Male 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Emilijus BINKIS | 12 | South Lincs Competitive SC | 7:36.21 |
| 3 | 3 | Oliver SHEPHERD | 14 | Deepings SC | 5:48.40 |
| 4 | 2 | Alfie GROUNSELL | 11 | Bassetlaw Swim Squad | 6:55.75 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Samuel POTTER | 14 | Bassetlaw Swim Squad | 5:38.16 |
| 2 | 7 | William VERE | 15 | South Lincs Competitive SC | 5:23.78 |
| 3 | 9 | Thomas COLLINS | 13 | Bassetlaw Swim Squad | 5:20.48 |
| 4 | 8 | Archie FRENCH | 14 | Lincoln Vulcans SC | 5:23.50 |
| 5 | 6 | Jacob HARNESS | 14 | Bassetlaw Swim Squad | 5:30.43 |
| 6 | 4 | Noah DEWSNAP | 12 | Bassetlaw Swim Squad | 5:44.26 |