EVENT 126 Girls 14/15 Yrs 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 2 | Esther Grigore | 14 | Northants | 1:07.96 |
| 1 | 4 | Olivia Davies | 14 | Swim Wales E | 1:07.24 |
| 2 | 6 | Lauren Bradley-Holt | 14 | Lancashire | 1:06.38 |
| 3 | 8 | Amelia Childs | 14 | Kent | 1:06.14 |
| 4 | 10 | Erin Donnelly | 15 | N & Durham | 1:06.06 |
| 5 | 9 | Paige Coombs | 15 | Surrey | 1:06.10 |
| 6 | 7 | Sadie Lucas | 14 | Berks&SBucks | 1:06.29 |
| 7 | 5 | Amy Brown | 14 | Dorset | 1:06.42 |
| 8 | 3 | Evie Richards | 15 | Leics | 1:07.48 |
| 9 | 1 | Marteg Dafydd | 15 | Swim Wales W | 1:09.15 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 12 | Emma Cruickshanks | 15 | Suffolk | 1:04.68 |
| 1 | 14 | Honey Osrin | 15 | Devon | 1:03.36 |
| 2 | 16 | Katie Shanahan | 14 | Scot West | 1:03.15 |
| 3 | 18 | Emily Iley | 14 | Essex | 1:02.60 |
| 4 | 20 | Mimi Morley Iszatt | 15 | Ox & N Bucks | 1:01.88 |
| 5 | 19 | Tia Ward | 15 | Yorkshire | 1:02.05 |
| 6 | 17 | Tatiana Tostevin | 15 | Somerset | 1:02.87 |
| 7 | 15 | Ellie Turner | 15 | Scot East | 1:03.36 |
| 8 | 13 | Caroline Lewitt | 15 | Middlesex | 1:03.94 |
| 9 | 11 | Eve Wright | 15 | Cambs | 1:05.57 |