| Final | ||||||
| Lane | Comp.No. | Name | YoB | Cat | Club | Time |
| 0 | 1 | Rose Webb | 11 | S6 | Northampton | 51.74 |
| 1 | 2 | Georgia Howell | 02 | S7 | ArunTridents | 48.98 |
| 2 | 3 | Abigail Wickens | 07 | S8 | Flitwick | 45.78 |
| 3 | 4 | Ela Letton-Jones | 06 | S13 | Swim Gwynedd | 38.50 |
| 4 | 5 | Connie Ratley | 08 | S9 | Colchester | 35.01 |
| 5 | 6 | Imogen Dodds | 09 | S13 | Wellingboro | 35.35 |
| 6 | 7 | Mwaba Mkwasa | 05 | S8 | Norwich Swan | 43.69 |
| 7 | 8 | Iona Winnifrith | 11 | S6 | Tonbridge | 50.49 |
| 8 | 9 | Ida Corcoran | 09 | S9 | Flitwick | 51.20 |