| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 1 | Matthew THOMAS | 17 | Worcester | : . |
| 1 | 2 | Joseph DOBB | 18 | Bromley | : . |
| 2 | 3 | James SLADE | 21 | Camden Swiss | : . |
| 3 | 4 | Joseph CHOONG | 21 | Sevenoaks | : . |
| 4 | 5 | Tom GREENFIELD | 29 | Co Cardiff | : . |
| 5 | 6 | Samuel CRABTREE | 19 | Thanet Swim | : . |
| 6 | 7 | Oscar JAMESON | 18 | Ealing | : . |
| 7 | 8 | Samuel LLOYD | 19 | Northampton | : . |
| 8 | 9 | Daniel JONES | 22 | Swansea Aq | : . |
| 9 | 10 | Jack GRAHAM | 21 | Co Liverpool | : . |