EVENT 126 Female 14/15 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Annabel Coleman | 15 | Northants | 1:13.43 |
| 2 | 3 | Chloe Stone | 14 | Cornwall | 1:10.25 |
| 3 | 5 | Katerina Di Maria | 15 | Norfolk | 1:07.03 |
| 4 | 7 | Lily O\'Neill | 15 | Cheshire | 1:06.58 |
| 5 | 6 | Isabella Keane | 15 | Ox & N Bucks | 1:06.90 |
| 6 | 4 | Leni Skelin | 15 | Gloucs | 1:08.68 |
| 7 | 2 | Grace Willetts | 15 | Shropshire | 1:10.94 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 9 | Jessica Huggins | 15 | Dorset | 1:06.24 |
| 1 | 11 | Darcie Platts | 15 | Leics | 1:05.90 |
| 2 | 13 | Lucy Calver | 15 | Bedfordshire | 1:05.53 |
| 3 | 15 | Amber Rigg | 15 | Cumbria | 1:05.04 |
| 4 | 17 | Vanesa Cimermanova | 15 | Cambs | 1:03.58 |
| 5 | 16 | Ffion Humphreys | 15 | SW Wales | 1:04.31 |
| 6 | 14 | Eve Wood | 15 | Scot North | 1:05.35 |
| 7 | 12 | Lilli-Rose Carr | 14 | Lincolnshire | 1:05.54 |
| 8 | 10 | Zara Shenton | 15 | Staffs | 1:06.17 |
| 9 | 8 | Megan Watts | 15 | Wiltshire | 1:06.35 |