| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 1 | Callum Rollin | 13 | Southport | : . |
| 1 | 2 | Leo He | 14 | Camden Swiss | : . |
| 2 | 3 | Noah Enticknap | 14 | Sevenoaks | : . |
| 3 | 4 | James Cleaver | 14 | Bromley | : . |
| 4 | 5 | Arun Oelkers | 14 | Mt Kelly | : . |
| 5 | 6 | Aidan Pilcher | 14 | teamipswich | : . |
| 6 | 7 | Matus Mydliar | 14 | Co Milton K | : . |
| 7 | 8 | William Reeves | 14 | Thanet Swim | : . |
| 8 | 9 | Oskar Farkas | 14 | Co Cambridge | : . |
| 9 | 10 | Max Murray | 14 | Worcester | : . |