EVENT 103 Girls 12/13 Yrs 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 2 | Leyla Manthorpe-Rizate | 00 | Herts | 1:20.81 |
| 1 | 4 | Megan Langton | 00 | Notts | 1:18.96 |
| 2 | 6 | Ellen Tiffany | 00 | Cheshire | 1:18.38 |
| 3 | 8 | Katie Robertson | 01 | Scot West | 1:17.87 |
| 4 | 10 | Maia Little | 00 | Ox & N Bucks | 1:17.52 |
| 5 | 9 | Lowri Mathias | 00 | Swim Wales W | 1:17.82 |
| 6 | 7 | Grace Kinnell | 99 | Hampshire | 1:17.93 |
| 7 | 5 | Lucy Clayton | 99 | Worcs | 1:18.90 |
| 8 | 3 | Anna Balfour | 01 | Scot East | 1:20.40 |
| 9 | 1 | Kienna Deacon | 99 | Swim Wales E | 1:23.44 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 12 | Jessica Shatford | 99 | Lancashire | 1:17.11 |
| 1 | 14 | Kitty Snaydon | 99 | Somerset | 1:16.49 |
| 2 | 16 | Lily Davis | 99 | Sussex | 1:15.10 |
| 3 | 18 | Imogen Morris | 99 | Derbyshire | 1:14.67 |
| 4 | 20 | Layla Black | 00 | Yorkshire | 1:12.20 |
| 5 | 19 | Alicia Wilson | 00 | Surrey | 1:12.40 |
| 6 | 17 | Annabel Guye-Johnson | 00 | Kent | 1:15.00 |
| 7 | 15 | Shauna Johnson | 00 | N & Durham | 1:16.10 |
| 8 | 13 | Josephine Searle | 01 | Berks&SBucks | 1:16.87 |
| 9 | 11 | Molly Thompson | 01 | Middlesex | 1:17.30 |