Heats (Declared Winners) Girls 12/13 Yrs 100m Butterfly
| Place | Name | AaD | Club | Time | R.Time | | 50 |
| 1. | Fiona Donnelly | 13 | Derbyshire | 1:04.46 | + 0.81 | | 29.94 |
| 2. | Danielle Lowe | 13 | Lancashire | 1:05.33 | + 0.81 | | 30.61 |
| 3. | Phoebe Lenderyou | 13 | N & Durham | 1:06.95 | + 0.79 | | 31.02 |
| 4. | Karley Mann | 13 | Middlesex | 1:07.57 | + 0.79 | | 31.71 |
| 5. | Tegan Turner-clarke | 13 | Yorkshire | 1:08.31 | + 0.75 | | 32.48 |
| 6. | Rachael O'donnell | 12 | Scot East | 1:09.32 | + 0.88 | | 32.45 |
| 7. | Abigail Houston | 13 | Somerset | 1:09.58 | + 0.87 | | 33.65 |
| 8. | Ellen Thomas | 13 | Surrey | 1:09.67 | + 0.89 | | 31.44 |
| 9. | Samantha Berry | 12 | Wiltshire | 1:09.76 | + 0.84 | | 33.11 |
| 10. | Charlotte Hicks | 12 | Suffolk | 1:09.84 | + 0.93 | | 33.06 |
| 11. | Alannah Fillingham | 13 | Berks&SBucks | 1:10.60 | + 0.78 | | 33.41 |
| 12. | Jenna Hussey | 13 | South Wales | 1:10.85 | + 0.87 | | 32.81 |
| 13. | Chloe Fulford | 13 | Hampshire | 1:11.13 | + 1.01 | | 32.96 |
| 14. | Kimberley Robinson | 13 | Cheshire | 1:12.22 | + 0.89 | | 34.32 |
| 15. | Rebecca Walton | 13 | Kent | 1:12.75 | + 0.91 | | 34.82 |
| 16. | Kirstie Hackett | 12 | Warwicks | 1:12.84 | + 0.87 | | 34.02 |
| 17. | Megan Brett | 12 | Herts | 1:14.39 | + 0.95 | | 35.53 |
| 18. | Aeron Brown | 13 | Staffs | 1:15.31 | + 0.88 | | 34.21 |
| 19. | Chloe Pollock | 13 | Leics | 1:17.15 | + 0.92 | | 35.30 |
| 20. | Cristina Richards | 13 | Sussex | 1:17.99 | + 0.89 | | 37.53 |
