EVENT 401 Women Open 800m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 3 | 2 | Nika Buhharova | 13 | | Corby | 12:59.33 |
| 4 | 4 | Isabelle Tanner | 14 | | Corby | 12:38.11 |
| 5 | 3 | Scarlett Humphrey | 18 | S11 | Northampton | 12:40.00 |
| 6 | 1 | Lucie Preston | 13 | | Corby | 12:59.59 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 6 | Mia Allan | 13 | | Northampton | 12:21.20 |
| 2 | 8 | Grace Williams | 18 | | Nene Valley | 11:54.70 |
| 3 | 10 | Aaliyah Beetson | 14 | | Wellingboro | 11:51.62 |
| 4 | 12 | Chloe Dando | 14 | | Corby | 11:41.37 |
| 5 | 11 | Sofia Reedha | 12 | | Corby | 11:45.11 |
| 6 | 9 | Chiara Kiely-Croft | 14 | | Northampton | 11:52.00 |
| 7 | 7 | Reena Adams | 15 | | Northampton | 12:09.85 |
| 8 | 5 | Ruby Cummins | 18 | | Wellingboro | 12:23.44 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 14 | Elizabeth Pow | 14 | | Rushden | 11:25.00 |
| 2 | 16 | Isabel Hollyman | 18 | | Wellingboro | 11:20.28 |
| 3 | 18 | Isla Robertson | 13 | | Northampton | 11:15.00 |
| 4 | 20 | Kate Webb | 33 | | Northampton | 11:11.00 |
| 5 | 19 | Amy McVey | 15 | | Northampton | 11:14.70 |
| 6 | 17 | Teagan Payne | 12 | | Northampton | 11:16.00 |
| 7 | 15 | Katie McLean | 14 | | Rushden | 11:23.00 |
| 8 | 13 | Emily Denton | 14 | | Northampton | 11:29.20 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 22 | Kaelyn Cowe | 14 | | Corby | 11:02.97 |
| 2 | 24 | Nya Wilkinson | 14 | | Northampton | 10:57.30 |
| 3 | 26 | Amber Haycock | 16 | S10 | Rushden | 10:50.00 |
| 4 | 28 | Orla Eyton-Jones | 17 | | Corby | 10:35.40 |
| 5 | 27 | Lucy Dando | 17 | | Corby | 10:47.17 |
| 6 | 25 | Taryn Payne | 14 | | Northampton | 10:54.70 |
| 7 | 23 | Maddie Taylor | 13 | | Corby | 10:59.63 |
| 8 | 21 | Amber-Rose Fennell | 15 | | Daventry | 11:10.00 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 30 | Beau Cunningham | 14 | | Corby | 10:28.11 |
| 2 | 32 | Grace Wingham | 16 | | Kettering | 10:25.60 |
| 3 | 34 | Lea Bromwich | 17 | | Corby | 10:15.11 |
| 4 | 36 | Grace Grindrod | 15 | | Northampton | 10:05.87 |
| 5 | 35 | Maddie Walden | 13 | | Northampton | 10:15.00 |
| 6 | 33 | Phebe Adams | 14 | | Northampton | 10:25.00 |
| 7 | 31 | Bryony Cook | 16 | | Rushden | 10:28.00 |
| 8 | 29 | Lana Webb | 14 | | Northampton | 10:30.00 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 38 | Ella Mae Prior | 15 | | Corby | 10:01.59 |
| 2 | 40 | Lilly Tappern | 16 | | Corby | 9:58.70 |
| 3 | 42 | Chiara Reedha | 14 | | Corby | 9:34.49 |
| 4 | 44 | Chloe Goodridge | 18 | | Northampton | 8:56.04 |
| 5 | 43 | Emilia Cieszczyk | 16 | | Northampton | 9:31.70 |
| 6 | 41 | Lily Freeman | 16 | | Northampton | 9:51.10 |
| 7 | 39 | Harriet Casey | 17 | | Corby | 10:01.00 |
| 8 | 37 | Kalinika Cwiklinska | 16 | | Northampton | 10:02.30 |