EVENT 401 Girls 12 Yrs/Over 1500m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 1 | Elspeth Dumphy-Wraith | 12 | Matlock | 23:01.95 |
| 1 | 3 | Amelie Ratliff | 13 | Co Derby | 22:42.72 |
| 2 | 5 | Olivia Lee | 13 | Co Derby | 22:11.21 |
| 3 | 7 | Sophia Lewis | 16 | Co Derby | 21:40.91 |
| 4 | 9 | Livi Vickers | 13 | Long Eaton | 20:53.69 |
| 5 | 8 | Jessica Wass | 15 | Co Derby | 21:58.03 |
| 6 | 6 | Emily McHugh | 15 | Co Derby | 21:52.06 |
| 7 | 4 | Ella Ratliff | 14 | Co Derby | 23:07.56 |
| 8 | 2 | Isla Johnson | 12 | Ripley | 22:41.78 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 11 | Daisy Tatlow-Turner | 13 | Chesterfield | 20:20.27 |
| 1 | 13 | Matilda Hase | 16 | Long Eaton | 20:03.77 |
| 2 | 15 | Poppy Mead | 18 | DerbyPhoenix | 18:24.96 |
| 3 | 17 | Lucy Cadden | 19 | Co Derby | 18:16.51 |
| 4 | 19 | Harriet Oxley | 18 | Repton | 17:58.34 |
| 5 | 18 | Hannah Hodgkiss | 17 | Repton | 18:09.23 |
| 6 | 16 | Adea Sollaku | 14 | Co Derby | 18:12.82 |
| 7 | 14 | Sophie Martin | 16 | Chesterfield | 19:09.77 |
| 8 | 12 | Kessie Webster | 13 | BelperMarlin | 19:42.63 |
| 9 | 10 | Eva Lemmon | 15 | DerbyPhoenix | 20:53.66 |