Girls 12/13 Yrs 100m Butterfly - Heats (Declared Winners)
Full Results
| Place | Name | YoB | Club | | Time | R.T. | FINA Pt | | 50 |
| 1. | Harriet West | (97) | Leics | | 1:06.00 | | 621 | | 32.33 |
| 2. | Siwan Thomas-Howells | (97) | Swim Wales W | | 1:06.11 | | 618 | | 31.68 |
| 3. | Chloe A Flower | (97) | Wiltshire | | 1:08.52 | | 555 | | 33.53 |
| 4. | Caitlin Wheatley | (97) | Ox & N Bucks | | 1:08.82 | | 548 | | 32.59 |
| 5. | Tiana Gordon | (97) | Northants | | 1:09.05 | | 543 | | 33.19 |
| 6. | Lucy McKenzie | (97) | Cumbria | | 1:09.32 | | 536 | | 32.67 |
| 7. | Lauren Pate | (97) | Staffs | | 1:09.36 | | 535 | | 34.50 |
| 8. | Alexandra Harris | (97) | Shropshire | | 1:09.54 | | 531 | | 33.32 |
| 9. | Tiffany M Bachelet | (97) | Scot East | | 1:10.10 | | 519 | | 33.31 |
| 10. | Jessica Jackson | (97) | Bedfordshire | | 1:10.21 | | 516 | | 33.32 |
| 11. | Lara Robinson | (97) | Notts | | 1:11.31 | | 493 | | 33.30 |
| 12. | Harriet Clarke | (97) | Norfolk | | 1:12.53 | | 468 | | - |
| 13. | Anna Cooper | (97) | Swim Wales E | | 1:12.89 | | 461 | | 34.76 |
| 14. | Olivia Kelsey | (97) | Lincolnshire | | 1:12.99 | | 459 | | 35.05 |
| 15. | Heather Pfeiffer | (97) | Cambs | | 1:13.09 | | 458 | | 34.69 |
| 16. | Gracie Snell | (98) | Cornwall | | 1:13.29 | | 454 | | 33.85 |
| 17. | Eve Winter | (97) | Scot Midland | | 1:13.54 | | 449 | | 35.32 |
| 18. | Holly Whitton | (96) | Gloucs | | 1:14.30 | | 436 | | 33.96 |
| 19. | Jade Aston | (96) | Warwicks | | 1:14.91 | | 425 | | 34.28 |
