EVENT 306 Female 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 2 | Niamh Khan | 15 | Co Manch Aq | 5:57.80 |
| 3 | 4 | Pinklily Tarek | 13 | Warrington W | 5:53.70 |
| 4 | 6 | Emily Tabern | 14 | Warrington W | 5:38.70 |
| 5 | 5 | Joanna Sutton | 13 | Copeland | 5:50.50 |
| 6 | 3 | Lina Khider | 13 | Trafford Met | 5:54.00 |
| 7 | 1 | Emily Rowe | 13 | Co Salford | 6:04.20 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 8 | Gabriella Giblin | 15 | Stockport Mo | 5:31.40 |
| 2 | 10 | Amelia Stratford | 14 | Rotherham Mo | 5:25.60 |
| 3 | 21 | Kate Schillinger | 14 | Winsford | 5:24.00 |
| 4 | 13 | Charlotte Grimshaw | 19 | Workington | 5:19.90 |
| 5 | 12 | Carey Sullivan | 14 | Co Manch Aq | 5:23.90 |
| 6 | 11 | Scarlett Hutchinson Th | 16 | Co Salford | 5:24.40 |
| 7 | 9 | India Brown | 14 | Plymouth Lea | 5:30.40 |
| 8 | 7 | Allanah Donlan | 13 | Warrington W | 5:37.30 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 15 | Petra Varga | 16 | Wirral Metro | 5:08.50 |
| 2 | 17 | Sophie Traill | 17 | Hazel Grove | 5:05.20 |
| 3 | 20 | Amy Kenworthy | 18 | Winsford | 5:01.51 |
| 4 | 19 | Abbie Roscoe | 15 | Wirral Metro | 4:52.20 |
| 5 | 22 | Katie Lee | 16 | Co Salford | 4:57.48 |
| 6 | 18 | Madison Johnson | 19 | Rotherham Mo | 5:05.00 |
| 7 | 16 | Mollie Fisher | 19 | Co Manch Aq | 5:05.78 |
| 8 | 14 | Hannah McCabrey | 19 | Swim_Ireland | 5:09.20 |