| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Gabriel Knight | 17 | S Bournem'th | 27.47 |
| 2 | 2 | Alexander Peaty | 18 | Wareham | 27.37 |
| 3 | 3 | Harry Stewart | 18 | West Dorset | 27.02 |
| 4 | 4 | Robbie Hemmings | 18 | Poole | 26.70 |
| 5 | 5 | Isaac Ellis | 18 | Seagulls SC | 26.82 |
| 6 | 6 | Alexandru Chiriac | 17 | Poole | 27.14 |
| 7 | 7 | Kai Weeks | 19 | Bourmth Coll | 27.40 |
| 8 | 8 | Oliver Jones | 17 | Poole | 27.63 |