| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 1 | Mehmet ZEREN | 11 | Chelsea&West | : . |
| 1 | 2 | Zane DAY | 11 | Co Peterboro | : . |
| 2 | 3 | Rohan PHILLIPS | 11 | Hillingdon | : . |
| 3 | 4 | Harry LEE-KNOWLES | 12 | Ealing | : . |
| 4 | 5 | William REEVES | 12 | Thanet Swim | : . |
| 5 | 6 | Caiden HIBBERT | 12 | Sevenoaks | : . |
| 6 | 7 | Peter SOCZEWKA | 12 | Hatfield | : . |
| 7 | 8 | Caleb GRIFFITHS | 12 | Co Liverpool | : . |
| 8 | 9 | Harry HEWITT | 12 | Swansea Aq | : . |
| 9 | 10 | Clark HOPKINSON | 11 | Boldmere | : . |