| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Lucas Deans | 13 | Chelmsford | 11:02.07 |
| 4 | 3 | Georgina Hamilton | 14 | Co St Albans | 10:45.50 |
| 5 | 2 | Jasmine Pereira | 14 | Hatfield | 10:52.34 |
| Heat Number - 2 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 5 | Autumn Shine | 15 | Potters Bar | 10:16.15 |
| 3 | 7 | Olivia Lydon | 17 | Royston | 10:11.37 |
| 4 | 9 | Charlie McKinnon | 15 | St Felix Sch | 9:48.90 |
| 5 | 8 | Esmie Kidman | 16 | West Norfolk | 9:59.82 |
| 6 | 6 | Tamsin Moren | 17 | Berkhamsted | 10:14.62 |
| 7 | 4 | Bethany Crawley | 14 | teamipswich | 10:45.20 |