| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | George Woodhead | 10 | Retford | 4:15.00 |
| 3 | 3 | Starla Hope | 13 | Retford | 3:20.00 |
| 4 | 2 | Isla Stockley | 11 | Retford | 3:20.53 |
| Heat Number - 2 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Noah Dewsnap | 12 | Retford | 2:58.13 |
| 2 | 7 | C Butterell-Quanbrough | 13 | Retford | 2:41.00 |
| 3 | 9 | Samuel Green | 13 | Retford | 2:34.30 |
| 4 | 8 | Harry Brancham | 17 | Retford | 2:38.00 |
| 5 | 6 | Imogen Howitt | 11 | Retford | 2:54.61 |
| 6 | 4 | Iona Watson | 14 | Retford | 3:03.00 |