| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 1 | Holly WORKMAN | 15 | Worcester | : . |
| 1 | 2 | Eliza POWELL | 14 | Bromley | : . |
| 2 | 3 | Ella MCEVER | 13 | Camden Swiss | : . |
| 3 | 4 | Madeleine GLEN | 15 | Sevenoaks | : . |
| 4 | 5 | Lili-mae HUTCHINSON | 16 | Co Cardiff | : . |
| 5 | 6 | Beth WILLIAMS | 16 | Thanet Swim | : . |
| 6 | 7 | Sonia ZOBEK | 13 | Ealing | : . |
| 7 | 8 | Katie DURNO | 16 | Northampton | : . |
| 8 | 9 | Megan BROWNE | 15 | Swansea Aq | : . |
| 9 | 10 | Lily anna IRELAND | 15 | Co Liverpool | : . |