EVENT 101 Womens Open 800m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 1 | Clara WATSON-FLOWERS | 13 | St Felix Sch | 9:48.80 |
| 4 | 3 | Sophie DOWDING | 12 | teamipswich | 9:47.50 |
| 5 | 2 | Bryony EDGINGS | 14 | Thurrock | 9:48.40 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 5 | Leah WIGHTMAN | 14 | West Norfolk | 9:46.01 |
| 2 | 7 | Ruby GREENHALF | 14 | Co Norwich | 9:44.10 |
| 3 | 9 | Lauren YOUNG | 16 | Flitwick | 9:43.30 |
| 4 | 11 | Eloise BAILEY | 17 | Modernian | 9:28.63 |
| 5 | 10 | Maeve POOLEY | 14 | West Suffolk | 9:30.10 |
| 6 | 8 | Madelyn LATIMER-HICKS | 15 | St Felix Sch | 9:44.00 |
| 7 | 6 | Georgina MUNDAY | 15 | Modernian | 9:46.00 |
| 8 | 4 | Millie TURNER | 16 | Basildon Ph | 9:46.94 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 13 | Tilly ANEMA | 18 | Co Norwich | 9:26.45 |
| 2 | 15 | Olivia LEE | 15 | Co Peterboro | 9:24.03 |
| 3 | 17 | Almudena VISSER VELEZ | 17 | Co Cambridge | 9:14.97 |
| 4 | 19 | Lucie PECK | 16 | St Felix Sch | 9:12.22 |
| 5 | 18 | Ruby WHEELER | 13 | Basildon Ph | 9:14.50 |
| 6 | 16 | Billie GRANT | 17 | Hatfield | 9:18.15 |
| 7 | 14 | Ella TURNER | 14 | Basildon Ph | 9:24.30 |
| 8 | 12 | Abbie BARNWELL | 16 | Team Luton | 9:26.89 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 21 | Ellie WHEELER | 17 | Basildon Ph | 9:08.50 |
| 2 | 23 | Daisy HILL | 20 | Co Norwich | 9:07.50 |
| 3 | 25 | Harriet SALISBURY | 15 | Co Peterboro | 9:05.90 |
| 4 | 27 | Mackenzie WHYATT | 17 | Co Peterboro | 8:48.82 |
| 5 | 26 | Rebecca HOWELL | 16 | Basildon Ph | 9:03.90 |
| 6 | 24 | Charlotte WALKER | 17 | St Felix Sch | 9:07.30 |
| 7 | 22 | Katie HAMMOND | 16 | Co Cambridge | 9:08.48 |
| 8 | 20 | Lily MERRETT | 16 | Co St Albans | 9:10.31 |