EVENT 407 Female 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 1 | Skyla Baybutt | 16 | S7 | Wigan | 1:57.99 |
| 2 | 5 | Brooklyn Hale | 14 | S9 | Cockermouth | 1:18.05 |
| 3 | 7 | Astrid Carroll | 15 | S12 | Stockport Mo | 1:14.50 |
| 4 | 10 | Lucia Lesti | 15 | | Co Salford | 1:07.20 |
| 5 | 8 | Siena Oxby | 17 | S14 | Stockport Mo | 1:13.22 |
| 6 | 6 | Chiara Fellone | 17 | S14 | Ramsbottom | 1:17.77 |
| 7 | 3 | Amelia Cowburn | 15 | S8 | Fleetwood | 1:36.56 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 15 | Lily Horton | 16 | | Wirral Metro | 1:06.30 |
| 2 | 21 | Anna Healey | 18 | | Co Manch Aq | 1:05.66 |
| 3 | 27 | Lily O'Neill | 16 | | Stockport Mo | 1:04.90 |
| 4 | 34 | Amber Rigg | 16 | | Cockermouth | 1:01.08 |
| 5 | 30 | Kate Schillinger | 14 | | Winsford | 1:03.54 |
| 6 | 24 | Hannah O'Mahony | 18 | | Co Manch Aq | 1:05.15 |
| 7 | 18 | Clara Spence | 16 | | Carnforth | 1:06.10 |
| 8 | 11 | Laila Lawrenson | 15 | | Preston | 1:06.66 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 16 | Gia Hothersall | 18 | | Wirral Metro | 1:06.24 |
| 2 | 22 | Peiqi Wu | 15 | | Stockport Mo | 1:05.45 |
| 3 | 28 | Alice Volkovaya | 16 | | Co Salford | 1:04.77 |
| 4 | 35 | Mollie Garratt | 20 | | Co Manch Aq | 1:00.52 |
| 5 | 31 | Katie Lee | 16 | | Co Salford | 1:03.35 |
| 6 | 25 | Kate Roberts | 15 | | Co Liverpool | 1:05.04 |
| 7 | 19 | Elizabeth Curphey | 15 | | Io Man | 1:06.10 |
| 8 | 12 | Ella Williams | 20 | | Preston | 1:06.44 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 17 | Francesca Cullen | 19 | | Co Manch Aq | 1:06.20 |
| 2 | 23 | Olivia Edgar | 15 | | Chorley Marl | 1:05.23 |
| 3 | 29 | Hannah Morris | 17 | | Wigan BEST | 1:04.77 |
| 4 | 36 | Sophie Shaw | 22 | | Co Manch Aq | 1:00.26 |
| 5 | 32 | Amber Ranson | 19 | | Co Manch Aq | 1:01.79 |
| 6 | 26 | Lydia Swindell | 17 | | Wigan BEST | 1:04.91 |
| 7 | 20 | Emily Hall | 14 | | Warrington W | 1:05.98 |
| 8 | 14 | Anna Fenwick | 16 | | Satellite | 1:06.41 |