| Final | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 1 | Kaiden Welsby | 14 | Stockport Mo | 56.55 |
| 1 | 2 | Samuel McCarthy | 14 | Co Cardiff | 56.40 |
| 2 | 3 | Cameron Green | 14 | Co Leeds | 56.13 |
| 3 | 4 | Jacob Whibley | 14 | Millfield | 55.46 |
| 4 | 5 | Filip Malov | 14 | Sutton Cheam | 54.74 |
| 5 | 6 | Stefan Krawiec | 13 | East Lothian | 55.31 |
| 6 | 7 | Oliver Waller | 14 | N Cornwall | 56.06 |
| 7 | 8 | Archie Hawkins | 14 | Thanet Swim | 56.34 |
| 8 | 9 | Maxwell Adams | 14 | Team Bath AS | 56.48 |
| 9 | 10 | Adam Graham | 14 | Millfield | 56.58 |