Heats (Declared Winners) Girls 12/13 Yrs 100m Butterfly
| Place | Name | AaD | Club | Time | | | 50 |
| 1. | Charlotte Bryan | 13 | North Wales | 1:04.13 | | | 30.71 |
| 2. | Amelia Knowles | 12 | Essex | 1:08.16 | | | 31.66 |
| 3. | Sophie Brown | 13 | Gloucs | 1:08.40 | | | 31.93 |
| 4. | Faye Henesy | 13 | Notts | 1:08.42 | | | 32.56 |
| 5. | Pamela Beck | 13 | Scot North | 1:09.52 | | | 32.29 |
| 6. | Abigail Williams | 13 | Northants | 1:09.99 | | | 32.92 |
| 7. | Samantha King | 12 | Scot West | 1:10.74 | | | 33.38 |
| 8. | Lauren Wray | 13 | Lincolnshire | 1:11.01 | | | 33.42 |
| 9. | Holly Bateman | 13 | Norfolk | 1:11.03 | | | 32.97 |
| 10. | Jessica Karp | 13 | Bedfordshire | 1:11.12 | | | 33.13 |
| 11. | Josie Williams | 13 | Cornwall | 1:12.16 | | | 32.93 |
| 12. | Emma Joyce | 13 | Ox & N Bucks | 1:12.74 | | | 33.95 |
| 13. | Tess Carter | 13 | Dorset | 1:13.41 | | | 34.43 |
| 14. | Jade Evans | 13 | Shropshire | 1:14.75 | | | 35.03 |
| 15. | Laura Shears | 13 | Devon | 1:16.32 | | | 34.93 |
| 16. | Zara Bailey | 12 | Cambs | 1:16.95 | | | 36.32 |
| 17. | Caitlin Clark | 13 | Worcs | 1:20.09 | | | 36.49 |
| Hannah Fowler | 12 | Cumbria | DQ | T-3L | | |
Disqualification Codes
