| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 1 | Benjamin BRADSHAW | 16 | Chelsea&West | : . |
| 1 | 2 | Herbie KINDER | 15 | Co Peterboro | : . |
| 2 | 3 | Dillon ROGLIC | 15 | Hillingdon | : . |
| 3 | 4 | Samuel THORNTON | 16 | Ealing | : . |
| 4 | 5 | Alex BOYD | 16 | Thanet Swim | : . |
| 5 | 6 | Nathaniel RODRIGUES | 15 | Sevenoaks | : . |
| 6 | 7 | Charlie RAYNER | 16 | Hatfield | : . |
| 7 | 8 | Tom SILK | 15 | Co Liverpool | : . |
| 8 | 9 | Llewellyn DAVIES | 16 | Swansea Aq | : . |
| 9 | 10 | Daniel JENKINS | 13 | Boldmere | : . |