| Heat Number - 1 | ||||||
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 3 | 1 | Leo PELLOW | 14 | S14 | St Ives Bay | 1:14.83 |
| 4 | 2 | Benjamin POPE | 12 | S8 | Havant & Wat | 59.49 |
| 5 | 3 | William PERRY | 16 | S6 | Stowe School | 49.20 |
| 6 | 4 | Conor BALLARD | 14 | S7 | Leatherhead | 46.76 |
| 7 | 5 | Maximilian TULLOCH | 11 | S9 | Chalfont | 45.71 |
| Heat Number - 2 | ||||||
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 3 | 7 | Adam ROEBUCK | 16 | S14 | Bude | 35.61 |
| 4 | 9 | Andrew KEELER | 20 | S14 | Devonport | 33.97 |
| 5 | 8 | Matthew RISHWORTH | 14 | S10 | Staines | 35.40 |
| 6 | 6 | Jack BAKER | 16 | S9 | TauntonDeane | 37.57 |