| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Grace Grindrod | 18 | Northampton | 1:25.20 |
| 2 | 2 | Claire Lera | 43 | Rushden | 1:23.42 |
| 3 | 3 | Alexa Parker | 17 | Corby | 1:21.25 |
| 4 | 4 | Charlotte Jarman | 18 | Rushden | 1:20.76 |
| 5 | 5 | Grace Wingham | 19 | Corby | 1:20.83 |
| 6 | 6 | Ruby Cummins | 21 | Wellingboro | 1:23.11 |
| 7 | 7 | Alice Berrill | 18 | Daventry | 1:23.71 |
| 8 | 8 | Georgia Smith | 17 | Corby | 1:29.45 |