| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 1 | Thomas O'donnell | 14 | Southport | : . |
| 1 | 2 | Oliver Wright | 14 | Camden Swiss | : . |
| 2 | 3 | Jaedon Lynch | 14 | Sevenoaks | : . |
| 3 | 4 | Sebastian Pickering | 14 | Bromley | : . |
| 4 | 5 | Jamie O'connor | 14 | Mt Kelly | : . |
| 5 | 6 | Noah Crabb | 14 | teamipswich | : . |
| 6 | 7 | Max Shaw | 14 | Co Milton K | : . |
| 7 | 8 | William Reeves | 14 | Thanet Swim | : . |
| 8 | 9 | Christopher Williamson | 14 | Co Cambridge | : . |
| 9 | 10 | David Annis | 13 | Worcester | : . |