EVENT 219 Boys Open 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 2 | Oliver LOND | 15 | Hinckley | 5:52.80 |
| 2 | 4 | Oliver BELCHER | 15 | Coalville | 5:47.67 |
| 3 | 6 | Jack SMITH | 13 | Leic Sharks | 5:44.62 |
| 4 | 8 | Freddie BURDETT | 13 | Leic Peng | 5:42.63 |
| 5 | 7 | Matthew LONGMAN | 16 | Loughborough | 5:43.22 |
| 6 | 5 | Harry LUCAS | 13 | Braunstone | 5:45.43 |
| 7 | 3 | James HOCKEY | 14 | Coalville | 5:49.95 |
| 8 | 1 | William OXLEY | 13 | Braunstone | 6:10.63 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 10 | Ethan SIMMONDS | 14 | Leicester Ne | 5:37.28 |
| 2 | 13 | Harrison BYWATER | 16 | Loughborough | 5:11.56 |
| 3 | 16 | Charlie JAMES | 17 | Market Har | 4:56.84 |
| 4 | 18 | James LAKE | 16 | Loughborough | 4:47.82 |
| 5 | 17 | Paul PAGE | 16 | Hinckley | 4:53.11 |
| 6 | 15 | Jack GOLDFINCH | 17 | Loughborough | 5:05.25 |
| 7 | 11 | Emerson-Blu GUPWELL | 13 | Braunstone | 5:35.43 |
| 8 | 9 | Kenny SMITH | 14 | Leic Sharks | 5:41.32 |