| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 1 | Isla MARSHALL | 18 | RTW Monson | 1:02.80 |
| 1 | 2 | Grace CUMMINGS | 18 | Thanet Swim | 1:02.33 |
| 2 | 3 | Annie SANDERS | 17 | Bromley | 1:01.77 |
| 3 | 4 | Lola BURNS | 18 | Beckenham | 1:00.29 |
| 4 | 5 | Hannah MURPHY | 17 | RTW Monson | 58.65 |
| 5 | 6 | Jessica GABLE | 17 | RTW Monson | 59.22 |
| 6 | 7 | Blythe JOLLEY-ELLIS | 20 | Orpington OJ | 1:01.37 |
| 7 | 8 | Kahlen ARUNDELL | 17 | Black Lion | 1:01.98 |
| 8 | 9 | Sophia O'NEILL | 18 | Orpington OJ | 1:02.73 |
| 9 | 10 | Freya JOHNSTON | 18 | Ashford Sch | 1:02.90 |