EVENT 108 Mixed 800m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 1 | Lewis LUNG | 12 | Co Leeds | 12:30.00 |
| 1 | 3 | Oskar SZAMUK | 11 | Co Leeds | 12:30.00 |
| 2 | 5 | Ava ALLEN | 11 | Co Leeds | 12:30.00 |
| 3 | 7 | Zac PHILLIPS | 11 | Co Leeds | 12:15.00 |
| 4 | 9 | Sophia Xiu Hui KOK | 11 | Co Leeds | 12:00.00 |
| 5 | 8 | Katie SADLER | 11 | Co Leeds | 12:06.49 |
| 6 | 6 | Fraser GALBRAITH | 11 | Co Leeds | 12:30.00 |
| 7 | 4 | Anna GLOSEK | 13 | Co Leeds | 12:30.00 |
| 8 | 2 | Evie MORAN | 12 | Co Leeds | 12:30.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 11 | Emma GLOSEK | 11 | Co Leeds | 12:00.00 |
| 1 | 13 | Tyler GREEN | 12 | Co Leeds | 12:00.00 |
| 2 | 15 | Barney HOBBS | 13 | Co Leeds | 12:00.00 |
| 3 | 17 | Liam LI | 11 | Co Leeds | 11:30.00 |
| 4 | 19 | Ava MCLARKEY | 12 | Co Leeds | 11:20.00 |
| 5 | 18 | Euan CARMODY | 12 | Co Leeds | 11:28.28 |
| 6 | 16 | Verity LILLEY | 13 | Co Leeds | 11:41.46 |
| 7 | 14 | Finnley JOHNSTONE | 11 | Co Leeds | 12:00.00 |
| 8 | 12 | Yin Ho Adrian CHAN | 12 | Co Leeds | 12:00.00 |
| 9 | 10 | Olive MITCHELL | 11 | Co Leeds | 12:00.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 21 | Evie THORPE | 13 | Co Leeds | 11:08.58 |
| 1 | 23 | Jacob JONES | 13 | Co Leeds | 11:03.24 |
| 2 | 25 | Ellis HARGREAVES | 13 | Co Leeds | 10:56.38 |
| 3 | 27 | Hogan LAM | 14 | Co Leeds | 10:40.04 |
| 4 | 29 | Jessica COLLEY | 12 | Co Leeds | 10:27.31 |
| 5 | 28 | Demilade AYEMOWA | 15 | Co Leeds | 10:31.25 |
| 6 | 26 | Madeline BECKRAM | 12 | Co Leeds | 10:45.00 |
| 7 | 24 | Solomon COFFEY-WILLS | 12 | Co Leeds | 10:59.09 |
| 8 | 22 | Amelia MATSON | 13 | Co Leeds | 11:04.66 |
| 9 | 20 | Ted WINGFIELD | 11 | Co Leeds | 11:12.56 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 31 | Jessica ROLLINGS | 14 | Co Leeds | 10:18.50 |
| 1 | 33 | Zachary WHITTAKER | 12 | Co Leeds | 9:55.80 |
| 2 | 35 | Rosie BROGDEN | 13 | Co Leeds | 9:47.29 |
| 3 | 37 | Oliver ATHA | 14 | Co Leeds | 9:34.74 |
| 4 | 39 | Jeffrey LANGE | 14 | Co Leeds | 9:27.09 |
| 5 | 38 | Oscar HUSSEY | 13 | Co Leeds | 9:32.40 |
| 6 | 36 | Alfie CRAGGS | 14 | Co Leeds | 9:40.09 |
| 7 | 34 | Seth CHARLESWORTH | 14 | Co Sheffield | 9:49.90 |
| 8 | 32 | Benjamin CLARK | 14 | Co Leeds | 10:15.80 |
| 9 | 30 | Tristan CARRASCO RUIZ | 13 | Trafford Met | 10:19.37 |