Girls 16/17 Yrs 100m Backstroke - Heats (Declared Winners)
Full Results
| Place | Name | YoB | Club | | Time | | R.T. | FINA Pt | | 50 |
| 1. | Medi Harris | (02) | Swim Wales W | | 1:00.86 | | + 0.61 | | | 29.79 |
| 2. | Katelyn Bergin | (01) | Devon | | 1:00.99 | | + 0.63 | | | 29.28 |
| 3. | Lily Boseley | (01) | Yorkshire | | 1:01.46 | | + 0.60 | | | 30.19 |
| 4. | Emilia Sansome | (01) | Berks&SBucks | | 1:01.72 | | + 0.68 | | | 30.27 |
| 5. | Imogen Meers | (02) | Kent | | 1:02.77 | | + 0.73 | | | 30.78 |
| 6. | Hannah Slater | (02) | N & Durham | | 1:03.24 | | + 0.69 | | | 30.65 |
| 7. | Rachel Anderson | (02) | Somerset | | 1:03.33 | | + 0.74 | | | 30.85 |
| 8. | Brodie Judge | (01) | Middlesex | | 1:03.58 | | + 0.72 | | | 30.65 |
| 9. | Emily Peck | (01) | Lancashire | | 1:03.64 | | + 0.63 | | | 31.11 |
| 10. | Rebecca Sutton | (01) | Swim Wales E | | 1:03.93 | | + 0.69 | | | 31.31 |
| 11. | Jasmine Iley | (01) | Essex | | 1:03.99 | | + 0.68 | | | 31.34 |
| 12. | Ellis Shiels | (02) | Scot West | | 1:04.45 | | + 0.68 | | | 31.15 |
| 13. | Emily Ford | (02) | Ox & N Bucks | | 1:04.52 | | + 0.67 | | | 30.79 |
| 14. | Tilly Hansen-Hamilton | (02) | Surrey | | 1:05.23 | | + 0.61 | | | 31.85 |
| 15. | Ciara Usher | (02) | Northants | | 1:05.44 | | + 0.68 | | | 32.03 |
| 16. | Erika Coupek | (02) | Scot East | | 1:05.56 | | + 0.67 | | | 31.74 |
| 17. | Lija Radziunaite | (02) | Suffolk | | 1:05.93 | | + 0.60 | | | 31.48 |
| 18. | Honor Davies | (02) | Dorset | | 1:06.47 | | + 0.74 | | | 31.96 |
| 19. | Charlotte Gudgeon | (01) | Leics | | 1:06.79 | | + 0.72 | | | 32.40 |
| 20. | Emma Leslie | (01) | Cambs | | 1:07.96 | | + 0.73 | | | 32.56 |
