| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 1 | Olivia FLETCHER | 16 | Worcester | : . |
| 1 | 2 | Emma VAN SELM | 15 | Bromley | : . |
| 2 | 3 | Anna PODURGIEL | 16 | Camden Swiss | : . |
| 3 | 4 | Ellie VOWELL | 15 | Sevenoaks | : . |
| 4 | 5 | Georgia MAY-CARR | 15 | Co Cardiff | : . |
| 5 | 6 | Olivia MILES | 16 | Thanet Swim | : . |
| 6 | 7 | Anel UTEPOVA | 15 | Ealing | : . |
| 7 | 8 | Betsy WIZARD | 15 | Northampton | : . |
| 8 | 9 | Leah OWEN | 16 | Swansea Aq | : . |
| 9 | 10 | Charlotte RENS | 15 | Co Liverpool | : . |