EVENT 103 Men's MC 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 2 | 1 | Zach Washington-Young | 34 | S6 | Ealing | 5:35.05 |
| 3 | 2 | Bruce Dee | 18 | S6 | Northampton | 5:31.26 |
| 4 | 3 | Owen Say | 23 | S8 | Nova Cent'n | 5:02.43 |
| 5 | 4 | Max Davies | 17 | S8 | Worksop | 5:01.33 |
| 6 | 5 | Jamie Curtis | 16 | S8 | Co Bristol | 4:57.85 |
| 7 | 6 | Lewis Jones | 18 | S9 | ArunTridents | 4:56.06 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 7 | Angus Leckonby | 22 | S14 | Scarborough | 4:46.26 |
| 1 | 8 | Corey Hare | 18 | S14 | teamipswich | 4:45.83 |
| 2 | 9 | Jude Gunner | 15 | S14 | St Felix Sch | 4:45.58 |
| 3 | 10 | Sam Downie | 18 | S8 | East Lothian | 4:42.88 |
| 4 | 11 | William Newton | 16 | S14 | Co Coventry | 4:36.18 |
| 5 | 12 | Tomas Navarro-Barber | 20 | S9 | Portsmouth N | 4:35.39 |
| 6 | 13 | Zack Sturgess | 17 | S10 | Bourmth Coll | 4:29.76 |
| 7 | 14 | Roan Brennan | 18 | S10 | Basildon Ph | 4:23.51 |
| 8 | 15 | Kieran Williams | 20 | S10 | Newquay | 4:23.31 |
| 9 | 16 | Oliver Carter | 24 | S10 | UniOfStirl | 4:16.65 |