EVENT 410 Womens Open 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 2 | Isobel HUME | 15 | Northampton | 5:10.51 |
| 2 | 4 | Ella THATCHER-PLANT | 15 | Wrekin Coll | 5:10.10 |
| 3 | 6 | Lauren SHIPLEY | 13 | Nova Cent'n | 5:08.01 |
| 4 | 8 | Jessica BANKS | 17 | Wolv'hampton | 5:05.80 |
| 5 | 7 | Sophie NEGRINE | 14 | Ellesmere Co | 5:06.46 |
| 6 | 5 | Natasha UTLEY | 15 | Retford | 5:08.50 |
| 7 | 3 | Charlotte HALL | 15 | Derventio | 5:10.20 |
| 8 | 1 | Eden SCHILLER | 15 | Leek | 5:11.26 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 11 | Kieva CLEGG | 16 | Boston | 5:04.12 |
| 2 | 15 | Isabel SPINLEY | 17 | Deepings | 5:00.20 |
| 3 | 19 | Ailsa MCDONALD | 16 | Northampton | 4:53.50 |
| 4 | 23 | Mollie WRIGHT | 19 | Nova Cent'n | 4:49.90 |
| 5 | 21 | Olivia GARDNER | 19 | Ellesmere Co | 4:51.00 |
| 6 | 17 | Daisy PLATTS | 17 | Co Leicester | 4:59.30 |
| 7 | 13 | Jessica MCDONOUGH | 15 | Ellesmere Co | 5:03.02 |
| 8 | 9 | Emma ERSKINE | 13 | Nova Cent'n | 5:05.50 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 12 | Keeley MURCOTT | 15 | Royal Wolv | 5:03.90 |
| 2 | 16 | Rebecca WINN | 17 | Co Coventry | 5:00.10 |
| 3 | 20 | Freya COLBERT | 13 | Nova Cent'n | 4:53.00 |
| 4 | 24 | Niamh HOFLAND | 15 | Royal Wolv | 4:49.60 |
| 5 | 22 | Michaella GLENISTER | 15 | Co Leicester | 4:50.90 |
| 6 | 18 | Olivia TATTON | 17 | Northampton | 4:56.60 |
| 7 | 14 | Carys O'REILLY | 14 | Co Leicester | 5:00.90 |
| 8 | 10 | Alexandra BARTLEY | 15 | Boldmere | 5:04.60 |