EVENT 410 Womens Open 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 1 | Freya Stevens | 17 | Northampton | 5:07.60 |
| 4 | 3 | Ella Thatcher-Plant | 16 | Wrekin Coll | 5:07.27 |
| 5 | 2 | Isabella Hobson-Corbet | 13 | Bassetlaw SS | 5:07.30 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 2 | 5 | Taylor O'Rourke | 15 | Northampton | 5:06.50 |
| 3 | 7 | Amber Downham | 13 | Chesterfield | 5:05.10 |
| 4 | 9 | Jessica Banks | 18 | Wolv'hampton | 5:04.52 |
| 5 | 8 | Livia Kingsland | 13 | Nova Cent'n | 5:04.80 |
| 6 | 6 | Erin Jones | 15 | Co Coventry | 5:06.50 |
| 7 | 4 | Kate Morris | 13 | Nova Cent'n | 5:07.10 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 12 | Harriet Smith | 14 | Wrekin Coll | 5:04.40 |
| 2 | 16 | Natasha Utley | 16 | Bassetlaw SS | 5:01.50 |
| 3 | 20 | Ailsa McDonald | 17 | Northampton | 4:56.00 |
| 4 | 24 | Mollie Wright | 20 | Nova Cent'n | 4:49.70 |
| 5 | 22 | Michaella Glenister | 16 | Leic Sharks | 4:51.50 |
| 6 | 18 | Emma Erskine | 14 | Nova Cent'n | 4:59.90 |
| 7 | 14 | Isobel Hume | 16 | Northampton | 5:03.20 |
| 8 | 10 | Chloe Harris | 13 | Royal Wolv | 5:04.50 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 13 | Anya Preece | 15 | Wrekin Coll | 5:03.72 |
| 2 | 17 | Kieva Clegg | 17 | Boston | 5:00.70 |
| 3 | 21 | Niamh Hofland | 16 | Royal Wolv | 4:51.80 |
| 4 | 25 | Freya Colbert | 14 | Nova Cent'n | 4:48.30 |
| 5 | 23 | Betsy Wizard | 15 | Northampton | 4:50.10 |
| 6 | 19 | Olivia Tatton | 18 | Northampton | 4:57.75 |
| 7 | 15 | Keeley Murcott | 16 | Royal Wolv | 5:02.70 |
| 8 | 11 | Alexandra Bartley | 16 | Royal Wolv | 5:04.43 |