EVENT 122 Girls 16/17 Yrs 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 2 | Paige Critchley | 17 | Hampshire | 1:15.60 |
| 1 | 4 | Amy Statham | 16 | Essex | 1:14.73 |
| 2 | 6 | Shannon McClelland | 17 | Scot West | 1:14.44 |
| 3 | 8 | Alex Kaye | 16 | Middlesex | 1:12.99 |
| 4 | 10 | Raquel Matos | 16 | Scot East | 1:12.40 |
| 5 | 9 | Freya Resendez | 16 | Yorkshire | 1:12.60 |
| 6 | 7 | Lydia Beeken | 17 | N & Durham | 1:13.51 |
| 7 | 5 | Florence Claringbold | 16 | Berks&SBucks | 1:14.50 |
| 8 | 3 | Ceri Gillett | 16 | Cheshire | 1:15.11 |
| 9 | 1 | Rebecca Beal | 16 | Dorset | 1:20.60 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 12 | Caitlin Tootill | 16 | Scot North | 1:12.04 |
| 1 | 14 | Chloe Bean | 17 | Surrey | 1:11.46 |
| 2 | 16 | Sarah Vasey | 16 | Derbyshire | 1:10.50 |
| 3 | 18 | Jodie Hawksworth | 16 | Staffs | 1:09.19 |
| 4 | 20 | Siobhan-Marie O'Connor | 16 | Somerset | 1:08.04 |
| 5 | 19 | Katie Armitage | 16 | Herts | 1:09.10 |
| 6 | 17 | Rachel Ritchie | 16 | Lancashire | 1:09.82 |
| 7 | 15 | Milly Furneaux | 16 | Kent | 1:10.70 |
| 8 | 13 | Jocelyn Ulyett | 17 | Ox & N Bucks | 1:11.55 |
| 9 | 11 | Imogen Gould | 17 | Notts | 1:12.32 |