EVENT 122 Girls 16/17 Yrs 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 2 | Ciara Gill-Ryan | 17 | Suffolk | 1:17.46 |
| 1 | 4 | Isabella Renwick | 16 | Somerset | 1:14.86 |
| 2 | 6 | Frances Newe | 16 | Surrey | 1:13.46 |
| 3 | 8 | Amy Mead | 17 | Derbyshire | 1:12.94 |
| 4 | 10 | Laura Head | 16 | Cheshire | 1:12.08 |
| 5 | 9 | Kameliya Stoimenova | 16 | Essex | 1:12.25 |
| 6 | 7 | Zoe Price | 17 | N & Durham | 1:13.02 |
| 7 | 5 | Laura Sharp | 17 | Swim Wales E | 1:14.08 |
| 8 | 3 | Taylor O\'Rourke | 16 | Northants | 1:16.30 |
| 9 | 1 | Elspeth Moran | 16 | Notts | 1:17.46 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 12 | Yvonne Brown | 17 | Scot West | 1:11.49 |
| 1 | 14 | Jessica Morgan | 16 | Lancashire | 1:11.36 |
| 2 | 16 | Katie Goodburn | 16 | Scot East | 1:10.69 |
| 3 | 18 | Anna Leman | 16 | Kent | 1:09.45 |
| 4 | 20 | Rebecca Clynes | 17 | Yorkshire | 1:06.97 |
| 5 | 19 | Angharad Evans | 16 | Shropshire | 1:09.36 |
| 6 | 17 | Lana Broekhoven | 16 | Devon | 1:09.72 |
| 7 | 15 | Emily Surminski | 17 | Middlesex | 1:11.21 |
| 8 | 13 | Natalia Druett | 16 | Ox & N Bucks | 1:11.41 |
| 9 | 11 | Megan Daley | 16 | Berks&SBucks | 1:11.72 |