EVENT 108 Boy/Girl Open 800m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 1 | Harriet DALLIMORE | 13 | Co Leeds | 14:40.00 |
| 1 | 3 | Samuel HILL | 12 | Co Leeds | 13:50.00 |
| 2 | 5 | Florence DIXON | 10 | Co Leeds | 12:30.00 |
| 3 | 7 | Isabelle KING | 12 | Co Leeds | 12:00.00 |
| 4 | 9 | Isabelle HALL | 10 | Co Leeds | 12:00.00 |
| 5 | 8 | Scarlett CLARKSON | 11 | Co Leeds | 12:00.00 |
| 6 | 6 | George CARRY | 13 | Co Leeds | 12:04.60 |
| 7 | 4 | Amit MALTZ | 11 | Co Leeds | 13:00.00 |
| 8 | 2 | Ella JORDAN | 11 | Co Leeds | 14:15.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 11 | Robyn HOWARD | 11 | Co Leeds | 12:00.00 |
| 1 | 13 | Molly NORTON | 11 | Co Leeds | 11:45.00 |
| 2 | 15 | Holly HARRISON | 11 | Co Leeds | 11:30.00 |
| 3 | 17 | Oliver STEELE | 14 | Co Leeds | 11:06.90 |
| 4 | 19 | Matthew JUST | 13 | Co Leeds | 10:56.42 |
| 5 | 18 | Matilda POTTER | 13 | Co Leeds | 11:00.00 |
| 6 | 16 | William WILSON | 11 | Co Leeds | 11:13.51 |
| 7 | 14 | Mia TRAVIS-JONES | 11 | Co Leeds | 11:30.00 |
| 8 | 12 | Jessica WOODS | 11 | Co Leeds | 11:47.00 |
| 9 | 10 | Mei YUASA | 11 | Co Leeds | 12:00.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 21 | Kessie WEBSTER | 11 | Repton Swim | 10:55.00 |
| 1 | 23 | Chloe MALONEY | 12 | Co Leeds | 10:45.60 |
| 2 | 25 | Matthew JAMES | 13 | Co Leeds | 10:30.00 |
| 3 | 27 | Emma WOOD | 13 | Co Leeds | 10:24.88 |
| 4 | 29 | Matilda ASHCROFT | 13 | Co Leeds | 10:14.80 |
| 5 | 28 | Alex BOYER | 14 | Darlington | 10:15.00 |
| 6 | 26 | William HICKLIN | 12 | Co Leeds | 10:30.00 |
| 7 | 24 | Cole WEBSTER | 14 | Repton Swim | 10:45.00 |
| 8 | 22 | Callum RAVEN | 13 | Co Leeds | 10:45.80 |
| 9 | 20 | Laura TEMPLE | 12 | Co Bradford | 10:55.37 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 31 | Luke DYER | 14 | Co Leeds | 10:09.80 |
| 1 | 33 | Charlie HINSON | 13 | Co Leeds | 10:06.60 |
| 2 | 35 | Maximus MURRAY | 14 | Gates &Whick | 9:40.60 |
| 3 | 37 | Lucy ALLMAN | 15 | Co Leeds | 9:37.80 |
| 4 | 39 | Jess WIDDOWSON | 15 | Co Leeds | 9:26.20 |
| 5 | 38 | Kourosh KHODAKHAH | 14 | Co Leeds | 9:30.20 |
| 6 | 36 | Henry FIRTH | 16 | Co Leeds | 9:38.00 |
| 7 | 34 | Solomon HODGSON | 15 | Co Leeds | 10:03.10 |
| 8 | 32 | Jad IDRIS | 15 | Co Leeds | 10:06.70 |
| 9 | 30 | Harry SENIOR | 15 | Co Leeds | 10:11.10 |