| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 1 | Isobella Evans | 12 | Southport | : . |
| 1 | 2 | Erin Andrews | 12 | Camden Swiss | : . |
| 2 | 3 | Alyze Gentles | 12 | Sevenoaks | : . |
| 3 | 4 | Beatrice Pickering | 12 | Bromley | : . |
| 4 | 5 | Millie Dixon | 12 | Mt Kelly | : . |
| 5 | 6 | Amelie Crabb | 12 | teamipswich | : . |
| 6 | 7 | Emma Alexander | 12 | Co Milton K | : . |
| 7 | 8 | Olivia Parpworth | 12 | Thanet Swim | : . |
| 8 | 9 | Amelia Speechley | 12 | Co Cambridge | : . |
| 9 | 10 | Milly Hemming | 12 | Worcester | : . |