| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 1 | Jacob Lea | 21 | Southport | : . |
| 1 | 2 | Jackson Olin | 17 | Camden Swiss | : . |
| 2 | 3 | Euan Terry | 15 | Sevenoaks | : . |
| 3 | 4 | Joseph Dobb | 19 | Bromley | : . |
| 4 | 5 | Federico Burdisso | 18 | Mt Kelly | : . |
| 5 | 6 | Elliot Cook | 25 | teamipswich | : . |
| 6 | 7 | Miles Drabwell | 18 | Co Milton K | : . |
| 7 | 8 | Max Jameson | 19 | Thanet Swim | : . |
| 8 | 9 | Matthew Titman | 18 | Co Cambridge | : . |
| 9 | 10 | Matthew Thomas | 18 | Worcester | : . |