Heats (Declared Winners) Girls 12/13 Yrs 100m Butterfly
| Place | Name | AaD | Club | Time | | | 50 |
| 1. | Fiona DONNELLY | 12 | Derbyshi ASA | 1:03.96 | | | 29.96 |
| 2. | Ellis JACKSON | 13 | Suffolk ASA | 1:05.58 | | | 30.88 |
| 3. | Sian MORGAN | 13 | YorkshireASA | 1:05.60 | | | 30.99 |
| 4. | Bryony CAMPBELL | 13 | SomersetCoun | 1:06.25 | | | 31.39 |
| 5. | Hayley ROBERTS | 13 | South Wales | 1:06.76 | | | 32.10 |
| 6. | Amy FRASER | 13 | Scotland Eas | 1:07.41 | | | 32.24 |
| 7. | Kathryn WOOLSTON-THOMA | 12 | Northumb&Dur | 1:07.55 | | | 31.60 |
| 8. | Sophie BROOKS | 13 | SussexCounty | 1:07.63 | | | 32.14 |
| 9. | Laura HALSALL | 13 | Lancashire C | 1:08.93 | | | 32.26 |
| 10. | Mollie VINCENT | 12 | Hampshire Co | 1:09.15 | | | 32.43 |
| 11. | Christina HOLOHAN | 13 | Surrey Co AS | 1:09.61 | | | 32.87 |
| 12. | Reut BENAIM | 13 | Middlesex Co | 1:09.67 | | | 33.26 |
| 13. | Eleanor WOOD | 13 | Berks&SBucks | 1:09.71 | | | 32.34 |
| 14. | Charlotte CLARIDGE | 13 | HertfordsASA | 1:09.72 | | | 32.36 |
| 15. | Fiona HARDIE | 13 | DorsetCounty | 1:10.03 | | | 32.98 |
| 16. | Megan DONNELLY | 13 | Scotland Wes | 1:10.65 | | | 32.96 |
| 17. | Holly OUGHTON | 13 | Nottinghamsh | 1:11.32 | | | 33.37 |
| 18. | Abigail SAYER | 13 | EssexCounASA | 1:12.04 | | | 33.68 |
| 19. | Hannah SAVAGE | 13 | KentCounASA | 1:12.63 | | | 33.46 |
| 20. | Alice BAILEY | 13 | CheshireCo | 1:14.80 | | | 35.16 |
