EVENT 101 Womens Open 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 2 | Amelia Rodd | 14 | Redditch | 4:29.70 |
| 4 | 4 | Constance Farmer | 15 | Co Leicester | 4:29.42 |
| 5 | 3 | Jade Kennerell | 15 | Nova Cent'n | 4:29.70 |
| 6 | 1 | Amy Mead | 14 | Nova Cent'n | 4:30.76 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 8 | Shannon Dalligan | 15 | Ellesmere Co | 4:28.20 |
| 2 | 14 | Polly Holden | 17 | Newcastle St | 4:23.40 |
| 3 | 20 | Calypso Harvey | 19 | Loughboro Un | 4:21.20 |
| 4 | 26 | Emily Clarke | 19 | Loughboro Un | 4:16.70 |
| 5 | 23 | Melanie Hall | 17 | Royal Wolv | 4:18.50 |
| 6 | 17 | Neve Fergie | 17 | Nova Cent'n | 4:22.00 |
| 7 | 11 | Zara Leleux | 15 | Wrekin Coll | 4:26.80 |
| 8 | 5 | Maisie Elliott | 13 | Co Leicester | 4:29.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 9 | Alicia Dingle | 14 | Royal Wolv | 4:27.70 |
| 2 | 15 | Anna Smail | 14 | Ellesmere Co | 4:22.50 |
| 3 | 21 | Esther Halford | 16 | Derventio | 4:19.40 |
| 4 | 27 | Mollie Wright | 18 | Nova Cent'n | 4:15.90 |
| 5 | 24 | Niamh Hofland | 14 | Royal Wolv | 4:18.10 |
| 6 | 18 | Rose Foden | 17 | Northampton | 4:21.90 |
| 7 | 12 | Olivia Tatton | 16 | Northampton | 4:23.90 |
| 8 | 6 | Holly Townson | 16 | Wrekin Coll | 4:28.70 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 10 | Mia Barber | 15 | Derventio | 4:26.90 |
| 2 | 16 | Sophie Negrine | 13 | Ellesmere Co | 4:22.20 |
| 3 | 22 | Abigail Burr | 18 | Lincoln Vulc | 4:18.97 |
| 4 | 28 | Freya Anderson | 15 | Ellesmere Co | 4:09.20 |
| 5 | 25 | Phoebe Griffiths | 16 | Ellesmere Co | 4:16.80 |
| 6 | 19 | Michaella Glenister | 14 | Co Leicester | 4:21.36 |
| 7 | 13 | Sarah Branch | 16 | Northampton | 4:23.70 |
| 8 | 7 | Ella Thatcher-Plant | 14 | Wrekin Coll | 4:28.50 |