EVENT 703 Womens Open 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 3 | Amy Treslove | 98 | Co Sheffield | 4:36.78 |
| 2 | 7 | Stephanie Blakeburn | 94 | Billingham | 4:22.98 |
| 3 | 11 | Niamh McDonagh | 95 | Loughboro Un | 4:22.78 |
| 4 | 15 | Julie Aglund Lauidsen | 96 | Denmark | 4:20.55 |
| 5 | 13 | Aisha Thornton | 91 | Loughboro Un | 4:21.19 |
| 6 | 9 | Jessie Westnidge | 97 | Co Sheffield | 4:27.51 |
| 7 | 5 | Laura Gillingham | 96 | Derwentside | 4:23.06 |
| 8 | 1 | Francesca Muir-Harris | 99 | Derventio | 4:34.10 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 4 | Rosie Rudin | 98 | Nova Cent'n | 4:22.37 |
| 2 | 8 | Brearnna Close | 97 | Co Manch Aq | 4:22.29 |
| 3 | 12 | Shauna Lee | 95 | Plymouth Lea | 4:18.63 |
| 4 | 16 | Camilla Hattersley | 95 | Co Glasgow | 4:15.47 |
| 5 | 14 | Rebecca Turner | 92 | Co Sheffield | DN:C . |
| 6 | 10 | Rachel Bethel | 00 | Irl-Ulster | DN:C . |
| 7 | 6 | Grace Lee | 95 | Loughboro Un | 4:26.05 |
| 8 | 2 | Rose Foden | 99 | Northampton | 4:28.10 |