EVENT 107 Girls 16/17 Yrs 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Olivia Newman-Baronius | 16 | Bedfordshire | 1:11.19 |
| 2 | 3 | Francesca Davies | 16 | Shropshire | 1:10.43 |
| 3 | 5 | Mae Singer | 17 | Gloucs | 1:07.70 |
| 4 | 7 | Millie Sandham | 16 | Cumbria | 1:07.37 |
| 5 | 6 | Aimee Masters | 17 | Wiltshire | 1:07.51 |
| 6 | 4 | Madeline Whitehouse | 16 | Warwicks | 1:08.07 |
| 7 | 2 | Jasmine Coleman | 16 | Norfolk | 1:11.02 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 9 | Betsy Vavasour | 16 | Dorset | 1:06.41 |
| 1 | 11 | Charlotte Williams | 16 | SE Herts | 1:05.31 |
| 2 | 13 | Megan Hansford | 16 | Hampshire | 1:04.56 |
| 3 | 15 | Lucy Hitchin | 17 | Derbyshire | 1:03.98 |
| 4 | 17 | Jessica Mellor | 17 | Staffs | 1:02.79 |
| 5 | 16 | Sophie Weston | 16 | Cheshire | 1:03.60 |
| 6 | 14 | Amber Ranson | 17 | Sussex | 1:04.49 |
| 7 | 12 | Emma Croker | 17 | Lincolnshire | 1:05.10 |
| 8 | 10 | Jemma Bain | 17 | Cornwall | 1:05.34 |
| 9 | 8 | Chloe Goodridge | 17 | Northants | 1:06.48 |