| Fastest Heat - 4 | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 23 | Phyllida Britton | 22 | Ealing | : . |
| 1 | 25 | Maisie Macartney | 18 | Loughboro Un | : . |
| 2 | 27 | Michaella Glenister | 17 | Leic Sharks | : . |
| 3 | 29 | Emily Clarke | 22 | Loughboro Un | : . |
| 4 | 31 | Leah Crisp | 18 | Co Leeds | : . |
| 5 | 30 | Alice Dearing | 22 | Loughboro Un | : . |
| 6 | 28 | Freya Colbert | 15 | Nova Cent'n | : . |
| 7 | 26 | Amber Keegan | 22 | Co Sheffield | : . |
| 8 | 24 | Fleur Lewis | 16 | Barnet Copt | : . |
| 9 | 22 | Milly Boulding | 15 | Co Leeds | : . |