| Heat Number - 1 | ||||||
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 0 | 2 | Liam Spence | 18 | SB14 | KingstonHull | 1:18.13 |
| 1 | 4 | George Kelman-Johns | 17 | SB14 | Clayesmore | 1:16.27 |
| 2 | 6 | Sol Bressat | 23 | SB14 | TigersJersey | 1:14.85 |
| 3 | 8 | Jack Milne | 17 | SB14 | Dun City Aqu | 1:12.55 |
| 4 | 10 | Tyler Ioannou | 20 | SB14 | Wycombe Dist | 1:11.71 |
| 5 | 9 | Gavin Roberts | 19 | SB14 | Co Glasgow | 1:11.84 |
| 6 | 7 | Joseph Seage | 19 | SB14 | Rotherham Mo | 1:13.74 |
| 7 | 5 | Cameron Vearncombe | 16 | SB14 | Newquay | 1:15.49 |
| 8 | 3 | Rhys Davies | 17 | SB14 | Pembs Cty | 1:16.36 |
| 9 | 1 | Matthew Harding | 19 | SB5 | Wirral Metro | 1:40.96 |