EVENT 118 Girls 12/13 Yrs 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 2 | Millie Wells | 12 | Shropshire | 1:12.20 |
| 1 | 4 | Honor Fox | 12 | Swim Wales E | 1:11.49 |
| 2 | 6 | Francesca Brady | 13 | Lancashire | 1:10.07 |
| 3 | 8 | Ruby Wheeler | 13 | Essex | 1:09.47 |
| 4 | 10 | Sophie Weston | 13 | Cheshire | 1:09.34 |
| 5 | 9 | Melissa Mainwaring | 13 | Scot East | 1:09.38 |
| 6 | 7 | Katarzyna Titterton | 13 | Surrey | 1:09.92 |
| 7 | 5 | Ruby Stephenson | 12 | Ox & N Bucks | 1:10.35 |
| 8 | 3 | Heidi Ren | 12 | Scot West | 1:12.08 |
| 9 | 1 | Emilia Cieszczyk | 12 | Northants | 1:13.42 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 12 | Lilly-Marie Derry | 13 | Kent | 1:08.53 |
| 1 | 14 | Sophie Busby | 13 | Derbyshire | 1:08.22 |
| 2 | 16 | Rebecca Hayward | 13 | Berks&SBucks | 1:07.98 |
| 3 | 18 | Elinor Chadwick | 12 | Middlesex | 1:06.90 |
| 4 | 20 | Libby Freeman | 13 | N & Durham | 1:03.82 |
| 5 | 19 | Sophie Bromley | 13 | Yorkshire | 1:06.80 |
| 6 | 17 | Matilda Bogle | 13 | Suffolk | 1:07.21 |
| 7 | 15 | Frankie Hatchard | 13 | Somerset | 1:08.06 |
| 8 | 13 | Ella Osborne | 13 | Devon | 1:08.51 |
| 9 | 11 | Rose Dickerson | 13 | Notts | 1:08.66 |