EVENT 104 Boy/Girl Open 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 7 | Libby Bromley | 11 | Buxton | |
| 2 | 3 | Will Freeman | 12 | Buxton | |
| 3 | 5 | Lydia Drabble | 11 | Buxton | |
| 4 | 9 | Esme Thomson | 11 | Buxton | |
| 5 | 2 | Francesca Bennett | 12 | Buxton | |
| 6 | 10 | A Montgomery-White | 11 | Buxton | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Ethan White | 13 | Buxton | |
| 2 | 1 | Ciorstaidh Smith | 13 | Buxton | |
| 3 | 11 | Ruby Ellis | 13 | Buxton | |
| 4 | 12 | Olivia Pope | 12 | Buxton | |
| 5 | 14 | Ruby Currington | 12 | Buxton | |
| 6 | 8 | Toby Kirkham | 10 | Buxton | |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 6 | Eva Sprenglewska | 13 | Buxton | |
| 2 | 13 | Martha Harris-Wood | 15 | Buxton | |
| 3 | 18 | Mia Stokes | 14 | Buxton | 5:21.72 |
| 4 | 17 | Chloe Montgomery-White | 13 | Buxton | 5:24.70 |
| 5 | 16 | Anwen Williams | 11 | Buxton | 5:40.03 |
| 6 | 15 | Bethany Griffiths | 15 | Buxton | 6:13.57 |