| B Final | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 1 | Sian LOCKETT | 18 | Hatfield | 1:10.53 |
| 2 | 2 | Sophie ALDEN | 15 | UEA Norwich | 1:10.21 |
| 3 | 3 | Martha DULEY | 14 | Colchester | 1:09.30 |
| 4 | 4 | Mollie ALLEN | 15 | Co Peterboro | 1:09.05 |
| 5 | 5 | Eleanor MITCHELL | 13 | Bishop Stort | 1:09.19 |
| 6 | 6 | Chloe HAZELL | 15 | UEA Norwich | 1:10.14 |
| 7 | 7 | Emily BOWYER | 16 | UEA Norwich | 1:10.37 |
| 8 | 8 | Cara HETHERINGTON | 14 | teamipswich | 1:10.75 |