| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 2 | Isabelle Pawlowski | 11 | Corby | 1:49.29 |
| 2 | 4 | Martha Booker | 11 | Wellingboro | 1:36.24 |
| 3 | 6 | Isobelle Frow | 12 | Corby | 1:32.41 |
| 4 | 8 | Sofia Reedha | 12 | Corby | 1:16.61 |
| 5 | 7 | Teagan Payne | 12 | Northampton | 1:23.54 |
| 6 | 5 | Neve Booker | 11 | Wellingboro | 1:34.71 |
| 7 | 3 | Cadence Flynn | 11 | Northampton | 1:40.44 |
| 8 | 1 | A Thorpe-Williams | 11 | Northampton | 1:55.79 |