| Fastest Heat - 8 | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 71 | Aimee Hood | 15 | Co Birm'ham | : . |
| 1 | 73 | Ella Dyson | 15 | Wycombe Dist | : . |
| 2 | 75 | Michaella Glenister | 17 | Leic Sharks | : . |
| 3 | 77 | Maisie Macartney | 18 | Thanet Swim | : . |
| 4 | 79 | Leah Crisp | 18 | Co Leeds | : . |
| 5 | 78 | Emily Clarke | 22 | Loughboro Un | : . |
| 6 | 76 | Fleur Lewis | 16 | Barnet Copt | : . |
| 7 | 74 | Lauren Wetherell | 17 | Ellesmere Co | : . |
| 8 | 72 | Nicole Ryan | 21 | Co Oxford | : . |
| 9 | 70 | Emilia Sansome | 18 | Wycombe Dist | : . |