| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Harry Davies | 19 | Seagulls SC | 1:12.49 |
| 2 | 2 | Sonny Chamberlain-Hyde | 19 | Seagulls SC | 1:11.90 |
| 3 | 3 | Lawrence Elliott | 17 | Seagulls SC | 1:10.58 |
| 4 | 4 | Harry Stewart | 18 | West Dorset | 1:05.06 |
| 5 | 5 | Oliver Jones | 17 | Poole | 1:09.90 |
| 6 | 6 | Isaac Ellis | 18 | Seagulls SC | 1:11.08 |
| 7 | 7 | Luca Parkes | 17 | S Bournem'th | 1:11.96 |
| 8 | 8 | Daniel Newman | 18 | S Bournem'th | 1:13.28 |