| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 1 | Lucy FARMER | 17 | Co Milton K | : . |
| 1 | 2 | Millie SANSOME | 16 | Wycombe Dist | : . |
| 2 | 3 | Ellie MILLINGTON | 18 | Co Oxford | : . |
| 3 | 4 | Emma ROWSON | 17 | Stockport Mo | : . |
| 4 | 5 | Alicia WILSON | 17 | Guildford Ct | : . |
| 5 | 6 | Isabel JONES | 17 | Millfield | : . |
| 6 | 7 | Tegan DREW | 17 | Plymouth Lea | : . |
| 7 | 8 | Hannah SLOAN | 17 | Co Cardiff | : . |
| 8 | 9 | Rebecca SHERWIN | 17 | teamipswich | : . |
| 9 | 10 | Sian HEAP | 16 | Co Derby | : . |