EVENT 107 Girls 16/17 Yrs 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 1 | Jemima Grigg | 02 | Cornwall | 1:09.51 |
| 2 | 3 | Lauren McRobbie | 03 | Dorset | 1:07.41 |
| 3 | 5 | Holly Leggott | 02 | Lincolnshire | 1:06.68 |
| 4 | 7 | Caitlin Kilgallen | 02 | Staffs | 1:05.82 |
| 5 | 6 | Gabriella Doughty | 03 | Wiltshire | 1:05.84 |
| 6 | 4 | Indya Sharp | 03 | Cumbria | 1:06.94 |
| 7 | 2 | Emma Shoobert | 02 | Bedfordshire | 1:08.05 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 9 | Lauren Stott | 02 | SE Herts | 1:04.64 |
| 1 | 11 | Olivia Butler | 03 | Gloucs | 1:04.21 |
| 2 | 13 | Faye Francis | 03 | Hampshire | 1:03.39 |
| 3 | 15 | Sophie Shaw | 02 | Sussex | 1:02.35 |
| 4 | 17 | Medi Harris | 02 | Swim Wales W | 1:00.70 |
| 5 | 16 | Charley Jones | 02 | Worcs | 1:01.92 |
| 6 | 14 | Megan Pye | 02 | Norfolk | 1:02.93 |
| 7 | 12 | Eve Wright | 03 | Cambs | 1:03.50 |
| 8 | 10 | Abigail Jolley | 02 | Warwicks | 1:04.48 |
| 9 | 8 | Evie Richards | 03 | Leics | 1:05.80 |