EVENT 126 Girls 14/15 Yrs 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 1 | Olivia Lee | 04 | Cambs | 1:09.39 |
| 2 | 3 | Emma Croker | 05 | Lincolnshire | 1:08.19 |
| 3 | 5 | Maddison Tuer | 04 | Cumbria | 1:07.91 |
| 4 | 7 | Leah Wightman | 05 | Norfolk | 1:07.32 |
| 5 | 6 | Lucy Ellis | 04 | Hampshire | 1:07.76 |
| 6 | 4 | Jessica Kefford | 04 | Bedfordshire | 1:07.98 |
| 7 | 2 | Gabrielle Chance | 04 | Gloucs | 1:08.48 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 9 | Katherine Butcher | 04 | Wiltshire | 1:06.56 |
| 1 | 11 | Eve Salmon-Hodges | 04 | Worcs | 1:06.22 |
| 2 | 13 | Yasmine Sheffield | 04 | Leics | 1:05.80 |
| 3 | 15 | Lily-May Marston | 05 | Staffs | 1:05.30 |
| 4 | 17 | Chloe Pritchard | 04 | Swim Wales W | 1:03.70 |
| 5 | 16 | Amy Brown | 04 | Dorset | 1:04.45 |
| 6 | 14 | Gracie Comyn | 05 | Warwicks | 1:05.74 |
| 7 | 12 | Jessica Keogh | 04 | SE Herts | 1:06.15 |
| 8 | 10 | Amber Ranson | 05 | Sussex | 1:06.27 |
| 9 | 8 | Isabelle Leigh | 04 | Cornwall | 1:06.88 |