| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Noah CAIN | 10 | Southport | |
| 3 | 3 | Tymoteusz OLEJNIK | 11 | Southport | 1:37.37 |
| 4 | 2 | Oscar MASZKOWSKI | 10 | Southport | 1:38.00 |
| Heat Number - 2 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 5 | Jamie HOWE | 11 | Southport | 1:28.53 |
| 3 | 7 | Henry WILCE | 14 | Southport | 1:18.97 |
| 4 | 6 | Luke KERSHAW | 12 | Southport | 1:19.30 |
| 5 | 4 | Charlie PARKES | 10 | Southport | 1:36.83 |