EVENT 103 Girls 12/13 Yrs 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 1 | Eloisa Miller | 12 | Bedfordshire | 1:25.05 |
| 2 | 3 | Issabelle Leigh | 13 | Cornwall | 1:23.80 |
| 3 | 5 | Erin Henly | 13 | Wiltshire | 1:21.47 |
| 4 | 7 | Katie Scott | 13 | Lincolnshire | 1:20.87 |
| 5 | 6 | Sophia Soteriou | 13 | Gloucs | 1:21.30 |
| 6 | 4 | Harriet Smith | 13 | Shropshire | 1:22.48 |
| 7 | 2 | Emily Williams | 12 | Swim Wales W | 1:24.43 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 9 | Rebecca McMenemy | 13 | Berks&SBucks | 1:19.56 |
| 1 | 11 | Erin Hull | 12 | Staffs | 1:18.17 |
| 2 | 13 | Polly Fish | 13 | Cambs | 1:17.80 |
| 3 | 15 | Millie Checkley | 13 | Worcs | 1:17.00 |
| 4 | 17 | Lottie Shaw | 13 | Northants | 1:12.20 |
| 5 | 16 | Charlotte Abramson | 13 | Norfolk | 1:16.60 |
| 6 | 14 | Jess Prokas | 12 | Cumbria | 1:17.45 |
| 7 | 12 | Sophie Baker | 13 | Derbyshire | 1:18.13 |
| 8 | 10 | Ela Norton | 13 | Herts | 1:18.41 |
| 9 | 8 | Maddison Nuttall | 13 | Warwicks | 1:19.63 |