EVENT 101 Women Open 800m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Aislin Foley-Wright | 14 | Basildon Ph | 10:25.40 |
| 2 | 3 | Maya Shackell | 14 | Watford SC | 10:24.11 |
| 3 | 5 | Tamsin Moren | 16 | Berkhamsted | 10:22.54 |
| 4 | 7 | Amy Harper | 14 | Watford SC | 10:20.98 |
| 5 | 6 | Milly Ogden | 17 | Dereham | 10:22.35 |
| 6 | 4 | Zara Fallon | 16 | Team Luton | 10:23.90 |
| 7 | 2 | Emma Malcolm | 16 | Thetford | 10:24.81 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 9 | Abigail Riches | 13 | Norwich Swan | 10:19.23 |
| 2 | 11 | Rebecca Brown | 14 | Stowmarket | 10:18.70 |
| 3 | 13 | Jessica Warne | 16 | Watford SC | 10:17.54 |
| 4 | 15 | Georgia Pritchard | 16 | Hatfield | 10:15.83 |
| 5 | 14 | Imola Jozsa | 15 | Hatfield | 10:16.99 |
| 6 | 12 | Kiera Turner | 15 | Team Waveney | 10:18.37 |
| 7 | 10 | Ruby Chapman | 15 | Norwich Swan | 10:19.01 |
| 8 | 8 | Olivia Kavanagh | 16 | Potters Bar | 10:20.46 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Alice Clark | 16 | West Suffolk | 10:14.78 |
| 2 | 19 | Amelie Passam | 15 | Dereham | 10:12.30 |
| 3 | 21 | Olivia Clarke | 15 | Chelmsford | 10:10.32 |
| 4 | 23 | Ella Dawson | 13 | Chelmsford | 10:08.07 |
| 5 | 22 | Esmie Kidman | 15 | West Norfolk | 10:08.10 |
| 6 | 20 | Olivia Lydon | 16 | Royston | 10:11.37 |
| 7 | 18 | Caitlin Hine | 18 | Watford SC | 10:14.72 |
| 8 | 16 | Olivia Riley | 15 | Hatfield | 10:15.38 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 25 | Lorne Balfour | 16 | St Felix Sch | 10:05.10 |
| 2 | 27 | Charlotte Williams | 15 | Hatfield | 10:01.09 |
| 3 | 29 | Cait Cotter | 14 | Chelmsford | 9:57.86 |
| 4 | 31 | Eleanor Mason | 18 | Co Cambridge | 9:54.33 |
| 5 | 30 | Gracie Comitti | 14 | Basildon Ph | 9:57.20 |
| 6 | 28 | Isabelle Barber | 15 | Stowmarket | 10:00.10 |
| 7 | 26 | Lyla Howard | 14 | Team Luton | 10:02.90 |
| 8 | 24 | Megan Gray | 14 | Hatfield | 10:05.14 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 33 | Ela Norton | 17 | Hatfield | 9:38.63 |
| 2 | 35 | Alexa Mann | 15 | Chelmsford | 9:35.10 |
| 3 | 37 | Madelyn Latimer-Hicks | 17 | St Felix Sch | 9:32.60 |
| 4 | 39 | Harriet Salisbury | 17 | Co Peterboro | 8:55.59 |
| 5 | 38 | Ruby Wheeler | 15 | Basildon Ph | 9:04.98 |
| 6 | 36 | Phoebe White | 16 | Harlow Pen | 9:33.87 |
| 7 | 34 | Yoshi Eschen | 21 | Co Cambridge | 9:35.48 |
| 8 | 32 | Kiera Beaver | 17 | Watford SC | 9:53.70 |