EVENT 102 Men Open 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 3 | 2 | Jonathan BOOTH | 23 | S9 | Bo Kirklees | 4:29.37 |
| 4 | 5 | Dylan BROOM | 19 | S14 | Torfaen D | 4:14.16 |
| 5 | 4 | Oliver CARTER | 21 | S10 | UniOfStirl | 4:19.63 |
| 6 | 1 | Michael JONES | 27 | S7 | Co Manch Aq | 4:49.45 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 8 | Angus ALLISON | 18 | | Warrender Ba | 4:03.21 |
| 2 | 12 | Joshua WILLIAMS | 19 | | Wycombe Dist | 3:57.83 |
| 3 | 16 | Luke TURLEY | 21 | | Bath Univ | 3:51.83 |
| 4 | 20 | Thomas DEAN | 21 | | Bath Univ | 3:48.59 |
| 5 | 18 | Jakob GOODMAN | 21 | | Loughboro Un | 3:51.24 |
| 6 | 14 | William BELL | 19 | | Loughboro Un | 3:54.82 |
| 7 | 10 | Edward MILDRED | 18 | | Northampton | 3:59.16 |
| 8 | 6 | Jack MUNCEY | 18 | | UniOfStirl | 4:07.14 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 9 | Harry CONSTANTINE | 21 | | Hatfield | 4:00.72 |
| 2 | 13 | William RYLEY | 23 | | Bath Univ | 3:55.59 |
| 3 | 17 | Stephen MILNE | 27 | | UniOfStirl | 3:51.70 |
| 4 | 21 | Daniel JERVIS | 25 | | Swansea Uni | 3:47.57 |
| 5 | 19 | Kieran BIRD | 22 | | Bath Univ | 3:50.90 |
| 6 | 15 | Tobias ROBINSON | 25 | | Wolv'hampton | 3:52.41 |
| 7 | 11 | Charlie HUTCHISON | 19 | | Loughboro Un | 3:58.37 |
| 8 | 7 | Jackson O'ROURKE | 19 | | Northampton | 4:05.59 |