| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Oliver Jones | 17 | Poole | 55.01 |
| 2 | 2 | Mark Tuddenham | 25 | S Bournem'th | 54.84 |
| 3 | 3 | Gabriel Knight | 17 | S Bournem'th | 54.69 |
| 4 | 4 | Isaac Ellis | 18 | Seagulls SC | 54.27 |
| 5 | 5 | Kai Weeks | 19 | Bourmth Coll | 54.37 |
| 6 | 6 | Harry Stewart | 18 | West Dorset | 54.81 |
| 7 | 7 | Matthew Workman | 18 | Bourmth Coll | 54.95 |
| 8 | 8 | Lawrence Elliott | 17 | Seagulls SC | 55.15 |