EVENT 303 Mens MC 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 3 | 8 | Scott Hadley | 20 | S8 | Orion | 5:27.54 |
| 4 | 12 | Conor Ballard | 16 | S10 | Leatherhead | 4:53.87 |
| 5 | 10 | James Brown | 16 | S9 | Royal Wolv | 5:12.61 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 0 | 2 | Alexander Hobbs | 13 | S7 | Mt Kelly | 7:08.17 |
| 1 | 4 | Ethan Naisbitt | 15 | S9 | Pioneer 79 | 5:56.87 |
| 2 | 6 | Leo McCrea | 15 | S6 | Bourmth Coll | 5:49.41 |
| 3 | 9 | Roan Brennan | 12 | S9 | Basildon Ph | 5:26.23 |
| 4 | 13 | Adam Whyborne | 17 | S10 | Billingham | 4:50.38 |
| 5 | 11 | Dominic Redpath | 16 | S9 | Portsmouth N | 4:59.50 |
| 6 | 7 | Luke Batty | 13 | S9 | Bolton Metro | 5:33.97 |
| 7 | 5 | Benjamin Pope | 14 | S8 | Havant & Wat | 5:49.74 |
| 8 | 3 | William Whitehead | 13 | S8 | Rotherham Mo | 7:02.03 |
| 9 | 1 | Aiden Watkins | 15 | S6 | Co Manch Aq | 8:12.07 |