EVENT 216 Female 800m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 2 | Scarlett LYNE | 13 | Co Manch Aq | 11:02.30 |
| 2 | 4 | Rosie BYRNE | 12 | Ramsbottom | 10:48.20 |
| 3 | 6 | Evie WEBSTER | 13 | Trafford Met | 10:29.37 |
| 4 | 8 | Grace O'HARA | 13 | Co Leeds | 10:26.82 |
| 5 | 7 | Amelie STEVENSON | 14 | Co Peterboro | 10:28.40 |
| 6 | 5 | Eva SMITH | 13 | Co Liverpool | 10:44.82 |
| 7 | 3 | Rosie HAIGH | 13 | Co Sheffield | 10:56.70 |
| 8 | 1 | Bianca BANIAS | 12 | Nova Cent'n | 11:03.70 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 10 | Olivia BYRNE | 13 | Bo Barnsley | 10:22.90 |
| 1 | 12 | Addison CROPPER | 12 | Co Leeds | 10:17.18 |
| 2 | 14 | Niamh STRAUTHER | 14 | Rotherham Mo | 10:16.80 |
| 3 | 16 | Megan BARNICOAT | 14 | Co Peterboro | 9:57.18 |
| 4 | 18 | M AZANA-BALL | 14 | Co Leeds | 9:55.88 |
| 5 | 17 | Isobel KEENS | 14 | Rotherham Mo | 9:56.90 |
| 6 | 15 | Paige BAGSHAW | 14 | Nova Cent'n | 10:11.68 |
| 7 | 13 | Isobelle RAFFERTY | 14 | Bassetlaw SS | 10:17.10 |
| 8 | 11 | Zoe BOWMAN | 14 | AJ Newcastle | 10:20.70 |
| 9 | 9 | Chloe JONES | 13 | LiverpoolPen | 10:26.18 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 20 | Emily FRENCH | 17 | Wirral Metro | 9:44.87 |
| 1 | 22 | Letian WU | 16 | Trafford Met | 9:40.00 |
| 2 | 24 | Lilly-Rose UNWIN | 15 | Stockport Mo | 9:37.27 |
| 3 | 26 | Francesca HALLAM-STOTT | 18 | Grantham | 9:35.10 |
| 4 | 28 | Grace TURNER | 18 | Grantham | 9:32.70 |
| 5 | 27 | Emily TABERN | 15 | Warrington W | 9:33.20 |
| 6 | 25 | Anabelle KETT | 16 | Co Peterboro | 9:36.30 |
| 7 | 23 | Olivia TAYLOR | 15 | Leamington | 9:38.80 |
| 8 | 21 | Emily ENGLAND-HALL | 13 | Co Leeds | 9:44.28 |
| 9 | 19 | Jessica HUBERY | 15 | Donc Dartes | 9:46.61 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 30 | Erika SHEPPARD | 17 | Leamington | 9:31.50 |
| 1 | 32 | Amelia GERRARD | 16 | Co Liverpool | 9:29.80 |
| 2 | 34 | Jorja HOWARD | 15 | Wigan BEST | 9:27.42 |
| 3 | 36 | Cazia MARTIN | 16 | Co Sheffield | 9:24.26 |
| 4 | 38 | Macy BARKER | 18 | Co Liverpool | 9:17.30 |
| 5 | 37 | Katy OTTERSON | 16 | Newcastle | 9:18.56 |
| 6 | 35 | Molly NORTON | 15 | Co Leeds | 9:24.30 |
| 7 | 33 | Isobel HITCHMOUGH | 16 | Co Liverpool | 9:27.80 |
| 8 | 31 | Jessica JONES | 16 | LiverpoolPen | 9:31.20 |
| 9 | 29 | Annabel IRVINE | 15 | Co Liverpool | 9:31.80 |