| Final | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 1 | Freya Harwood | 15 | Hitchin | 38.57 |
| 2 | 2 | Ashleigh Cooper | 15 | Hitchin | 38.46 |
| 3 | 3 | Katie Jeffrey | 15 | Hatfield | 37.96 |
| 4 | 4 | Ela Norton | 15 | Hatfield | 36.63 |
| 5 | 5 | Caitlin Hartley | 15 | Hatfield | 36.89 |
| 6 | 6 | Lydia Zanetti | 15 | Watford SC | 38.23 |
| 7 | 7 | Niamh Kelly | 15 | Hatfield | 38.56 |
| 8 | 8 | Kiera Beaver | 15 | Watford SC | 38.91 |