EVENT 122 Girls 16/17 Yrs 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 2 | Maddi Barnaby | 17 | Sussex | 1:16.06 |
| 1 | 4 | Jessica Ayling | 16 | Essex | 1:15.54 |
| 2 | 6 | Charlotte James | 17 | Dorset | 1:14.50 |
| 3 | 8 | Ally Larson | 17 | Middlesex | 1:14.00 |
| 4 | 10 | COURTNEY SMITH | 17 | Leics | 1:12.70 |
| 5 | 9 | Kiera Henley | 16 | Cheshire | 1:13.55 |
| 6 | 7 | Jade Kennerell | 16 | Notts | 1:14.50 |
| 7 | 5 | Katy Smith | 17 | Scot East | 1:15.17 |
| 8 | 3 | Naomi Van Dongen | 17 | Hampshire | 1:15.71 |
| 9 | 1 | Amber Owen | 17 | Swim Wales E | 1:16.96 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 12 | Aiyana Lawson | 16 | Ox & N Bucks | 1:11.64 |
| 1 | 14 | AMY HODGSON | 17 | Surrey | 1:11.10 |
| 2 | 16 | SAVANNAH BEST | 17 | Devon | 1:09.90 |
| 3 | 18 | Amy Bell | 17 | Yorkshire | 1:09.10 |
| 4 | 20 | Annabel Guye-Johnson | 17 | Kent | 1:06.60 |
| 5 | 19 | Katie Robertson | 16 | Scot West | 1:07.90 |
| 6 | 17 | Rachel Taylor | 17 | N & Durham | 1:09.80 |
| 7 | 15 | Lily Booker | 16 | Somerset | 1:10.30 |
| 8 | 13 | Emily Lawrence | 16 | Lancashire | 1:11.20 |
| 9 | 11 | Lauren Watt | 16 | Suffolk | 1:12.01 |