| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Maja BALL | 10 | Grantham | |
| 4 | 2 | Evelyn CHARITY | 10 | Grantham | |
| 5 | 3 | Sofia ASHLEY | 8 | Grantham | |
| 6 | 4 | Jia CHEN-REES | 9 | Grantham | |
| Heat Number - 2 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 6 | Harry BIBBY | 9 | Grantham | |
| 2 | 8 | Tabitha GODDARD | 9 | Grantham | |
| 3 | 10 | Oscar BEMBRIDGE | 10 | Grantham | |
| 4 | 12 | Margot ASSENZA | 9 | Grantham | 45.00 |
| 5 | 11 | Matilda HARPER | 10 | Grantham | |
| 6 | 9 | Cyril BAO | 10 | Grantham | |
| 7 | 7 | Ariana HANTON | 8 | Grantham | |
| 8 | 5 | Holly PEARSON | 10 | Grantham | |