| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Sascha NEL | 13 | Grantham | |
| 4 | 3 | Lucy ABBOTT | 11 | Grantham | |
| 5 | 4 | Eden DYSON | 12 | Grantham | |
| Heat Number - 2 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 7 | Ellena HOWITT | 12 | Grantham | 3:07.40 |
| 2 | 9 | Grace HOWITT | 14 | Grantham | 3:05.13 |
| 3 | 11 | Megan BROWN | 14 | Grantham | 2:44.34 |
| 4 | 14 | Grace TURNER | 16 | Grantham | 2:26.60 |
| 5 | 12 | Grace MACDONALD | 14 | Grantham | 2:38.71 |
| 6 | 10 | Harriet MCCORMACK | 14 | Grantham | 2:54.66 |
| 7 | 8 | Emilie WEBB | 13 | Grantham | 3:07.26 |
| 8 | 5 | Lucy WILLATTS | 12 | Grantham | 4:10.30 |