| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Grace MACDONALD | 12 | Grantham | |
| 3 | 2 | Luke DAYBELL | 12 | Grantham | |
| 4 | 3 | Zach HOPKINSON | 12 | Grantham | |
| Heat Number - 2 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Jacob FISH | 12 | Grantham | |
| 2 | 7 | Francesca HALLAM-STOTT | 14 | Grantham | 19:27.25 |
| 3 | 9 | Chloe HOPKINSON | 16 | Grantham | 18:17.69 |
| 4 | 8 | Owen HATHWAY | 15 | Grantham | 19:21.50 |
| 5 | 6 | Alexandra HALLAM-STOTT | 15 | Grantham | 21:31.45 |
| 6 | 4 | Elena ALDENHOFF-KELLY | 13 | Grantham | |