| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Ivy Morris | 12 | Daventry | 47.52 |
| 2 | 2 | Jessica Kemp | 12 | Wellingboro | 44.52 |
| 3 | 3 | Addyson Hicks | 12 | Corby | 43.19 |
| 4 | 4 | Amber Muir | 12 | Rushden | 40.55 |
| 5 | 5 | Olivia Fern | 12 | Northampton | 41.86 |
| 6 | 6 | Darcy Poole | 12 | Northampton | 44.03 |
| 7 | 7 | Maria Volosciuc | 12 | Daventry | 45.08 |
| 8 | 8 | Isabella Gerrett | 12 | Rushden | 47.63 |