EVENT 504 Mens MC 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 2 | 6 | Josef Craig | 97 | S8 | Co Sund'land | 4:35.87 |
| 3 | 10 | Lewis White | 00 | S9 | Co Derby | 4:27.02 |
| 4 | 14 | Stephen Clegg | 95 | S12 | East Lothian | 4:18.52 |
| 5 | 12 | Oliver Hynd | 94 | S8 | Nova Cent'n | 4:24.69 |
| 6 | 8 | Benjamin Foulston | 00 | S10 | Nova Cent'n | 4:32.26 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 0 | 2 | Callum Pearson | 96 | S10 | Hastings | 4:47.74 |
| 1 | 4 | Luke Reeson | 87 | S10 | Cockermouth | 4:46.21 |
| 2 | 7 | Craig McNeil | 97 | S10 | SwimTrafford | 4:35.48 |
| 3 | 11 | Jonathan Eke | 96 | S10 | Co Cardiff | 4:25.37 |
| 4 | 15 | Kahoru Harazawa | 97 | S10 | Beckenham | 4:17.05 |
| 5 | 13 | Jonathan Booth | 98 | S9 | Bo Kirklees | 4:24.15 |
| 6 | 9 | Jaxon Simmons | 00 | S13 | Co Peterboro | 4:29.24 |
| 7 | 5 | Oliver Carter | 00 | S10 | Carnegie | 4:38.68 |
| 8 | 3 | Michael Jones | 94 | S7 | Mt Kelly | 4:46.58 |
| 9 | 1 | Jacob Leach | 00 | S8 | Cockermouth | 4:58.66 |