| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 1 | Pietro UBERTALLI | 13 | Chelsea&West | : . |
| 1 | 2 | Connor WALKER | 13 | Co Peterboro | : . |
| 2 | 3 | Dillon CHANA | 14 | Hillingdon | : . |
| 3 | 4 | Billy LEE-KNOWLES | 14 | Ealing | : . |
| 4 | 5 | Luke FOWLE | 14 | Thanet Swim | : . |
| 5 | 6 | Louis HAYES | 13 | Sevenoaks | : . |
| 6 | 7 | Michael KLIMASZEWSKI | 13 | Hatfield | : . |
| 7 | 8 | Ellis CLEWORTH | 13 | Co Liverpool | : . |
| 8 | 9 | Connor SMART | 14 | Swansea Aq | : . |
| 9 | 10 | Oliver CARLESS | 13 | Boldmere | : . |