| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 1 | Alexander JOHNSTON | 12 | Chelsea&West | : . |
| 1 | 2 | Jack BROWN | 14 | Co Peterboro | : . |
| 2 | 3 | Oliver LATHAM | 14 | Hillingdon | : . |
| 3 | 4 | Pietro LOMBARDO | 14 | Ealing | : . |
| 4 | 5 | Ali SETTERFIELD | 13 | Thanet Swim | : . |
| 5 | 6 | Benjamin WARD | 14 | Sevenoaks | : . |
| 6 | 7 | Luke PESTAILLE | 14 | Hatfield | : . |
| 7 | 8 | Sam ELLIS | 13 | Co Liverpool | : . |
| 8 | 9 | Aneurin DAVIES | 13 | Swansea Aq | : . |
| 9 | 10 | Jamie DARK | 14 | Boldmere | : . |