EVENT 103 Girls 12/13 Yrs 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 2 | Maya Leech | 13 | Shropshire | 1:22.06 |
| 1 | 4 | Ellyn Macphee | 12 | Scot West | 1:20.28 |
| 2 | 6 | Olivia Cooper | 13 | Essex | 1:19.75 |
| 3 | 8 | Sophie Weston | 13 | Cheshire | 1:19.05 |
| 4 | 10 | Chloe Bown | 13 | Somerset | 1:18.23 |
| 5 | 9 | Chloe Baduna | 13 | Middlesex | 1:18.39 |
| 6 | 7 | Megan Oram | 13 | Derbyshire | 1:19.70 |
| 7 | 5 | Pia Summers-Newton | 13 | Northants | 1:19.86 |
| 8 | 3 | Sarah McNaughton | 13 | Scot East | 1:20.41 |
| 9 | 1 | Nina Brown | 13 | Ox & N Bucks | 1:22.12 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 12 | Marija Romanovskaja | 13 | Notts | 1:17.82 |
| 1 | 14 | Chloe Adams | 13 | Berks&SBucks | 1:16.98 |
| 2 | 16 | Amber Piper | 13 | Kent | 1:15.64 |
| 3 | 18 | Charlotte Bianchi | 13 | Yorkshire | 1:14.70 |
| 4 | 20 | Jasmine D'Cunha | 13 | Devon | 1:14.36 |
| 5 | 19 | Louise Bressler | 13 | Surrey | 1:14.51 |
| 6 | 17 | Sophie Brassington | 13 | Swim Wales E | 1:14.97 |
| 7 | 15 | Naomi Parker | 13 | N & Durham | 1:16.12 |
| 8 | 13 | Beth Young | 13 | Suffolk | 1:17.25 |
| 9 | 11 | Zara Dodd | 13 | Lancashire | 1:17.84 |