EVENT 122 Girls 16/17 Yrs 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 2 | Toni Whitney | 96 | Swim Wales E | 1:19.25 |
| 1 | 4 | Jodi Turner | 97 | Berks&SBucks | 1:16.79 |
| 2 | 6 | Amber Keegan | 97 | Notts | 1:16.10 |
| 3 | 8 | Abbie Haward | 96 | Ox & N Bucks | 1:14.98 |
| 4 | 10 | Eleanor Stevenson | 96 | N & Durham | 1:12.80 |
| 5 | 9 | Lucy Bean | 97 | Surrey | 1:12.90 |
| 6 | 7 | Eilidh Campbell | 96 | Hampshire | 1:16.06 |
| 7 | 5 | Kathleen Dawson | 97 | Cheshire | 1:16.25 |
| 8 | 3 | Emily Tang | 97 | Scot West | 1:18.22 |
| 9 | 1 | Emma Pay | 97 | Worcs | 1:20.86 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 12 | Bethan Sloan | 96 | Swim Wales W | 1:12.75 |
| 1 | 14 | Alexandra Kaye | 96 | Middlesex | 1:12.06 |
| 2 | 16 | Rachel Ritchie | 96 | Lancashire | 1:10.10 |
| 3 | 18 | Katie Armitage | 96 | Herts | 1:09.25 |
| 4 | 20 | Sophie Taylor | 96 | Yorkshire | 1:05.50 |
| 5 | 19 | Siobhan-Marie O'Connor | 95 | Somerset | 1:06.60 |
| 6 | 17 | Rachael O'Donnell | 96 | Scot East | 1:10.10 |
| 7 | 15 | Molly Renshaw | 96 | Derbyshire | 1:10.17 |
| 8 | 13 | Federica Williamson | 97 | Sussex | 1:12.22 |
| 9 | 11 | Alice Latham | 97 | Kent | 1:12.80 |