EVENT 103 Girls 12/13 Yrs 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 1 | Scarlet Tinwell | 07 | Staffs | 1:23.78 |
| 2 | 3 | Ellie Wilson | 07 | Cumbria | 1:22.45 |
| 3 | 5 | Lena Nejkic | 06 | Gloucs | 1:21.22 |
| 4 | 7 | Darcey Moriarty | 06 | Warwicks | 1:20.66 |
| 5 | 6 | Ellie-Rose Lyon | 07 | Norfolk | 1:21.15 |
| 6 | 4 | Isabella Thomson | 06 | Wiltshire | 1:21.41 |
| 7 | 2 | Holly Marshall | 06 | Lincolnshire | 1:22.97 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 9 | Kirsty Fuge | 06 | SE Herts | 1:20.08 |
| 1 | 11 | Abby Mitchell | 06 | Leics | 1:18.74 |
| 2 | 13 | Tiasha Michelo | 06 | Dorset | 1:17.82 |
| 3 | 15 | Caera Lewis | 06 | Swim Wales W | 1:16.51 |
| 4 | 17 | Rosie Richards | 06 | Hampshire | 1:15.16 |
| 5 | 16 | Zara Beaumont | 06 | Worcs | 1:15.40 |
| 6 | 14 | Emma Allatt-File | 06 | Sussex | 1:17.32 |
| 7 | 12 | Macy Dexter | 06 | Cambs | 1:18.16 |
| 8 | 10 | Lucy Buckingham | 06 | Bedfordshire | 1:19.78 |
| 9 | 8 | Amelia Durant | 06 | Cornwall | 1:20.41 |