EVENT 102 Men Open 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 3 | 1 | Theodore Thompson | 03 | Mt Kelly | 4:06.40 |
| 4 | 3 | Samuel Tucker | 04 | Wycombe Dist | 4:04.98 |
| 5 | 2 | Jackson O'Rourke | 02 | Northampton | 4:05.59 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 5 | Joseph Sadler | 03 | Nova Cent'n | 4:02.91 |
| 2 | 9 | Joshua Williams | 02 | Wycombe Dist | 3:57.83 |
| 3 | 13 | Luke Turley | 00 | Bath NC | 3:51.83 |
| 4 | 17 | Thomas Dean | 00 | Bath NC | 3:48.59 |
| 5 | 15 | Jakob Goodman | 00 | Loughboro Un | 3:51.24 |
| 6 | 11 | William Ryley | 98 | Bath Univ | 3:55.59 |
| 7 | 7 | Alexander Hindle | 02 | Co Birm'ham | 4:01.12 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 6 | Martin McInnes | 98 | Co Glasgow | 4:02.90 |
| 2 | 10 | Regan Lloyd | 97 | UniOfStirl | 3:56.88 |
| 3 | 14 | Stephen Milne | 94 | UniOfStirl | 3:51.70 |
| 4 | 18 | Daniel Jervis | 96 | Swansea Uni | 3:47.57 |
| 5 | 16 | Kieran Bird | 99 | Bath NC | 3:50.90 |
| 6 | 12 | William Bell | 02 | Loughboro Un | 3:54.36 |
| 7 | 8 | Charlie Hutchison | 02 | Loughboro NC | 3:57.89 |
| 8 | 4 | Joshua Weston | 04 | Wycombe Dist | 4:04.30 |