EVENT 308 Mixed 1500m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 2 | Ted WINGFIELD | 10 | Co Leeds | 23:25.22 |
| 1 | 4 | Solomon COFFEY-WILLS | 11 | Co Leeds | 23:09.00 |
| 2 | 6 | Isla CUNDILL | 11 | Co Leeds | 23:02.96 |
| 3 | 8 | Lauren MCMANUS | 16 | Eckington | 22:59.30 |
| 4 | 10 | Henry PATTERSON | 10 | Co Leeds | 22:06.37 |
| 5 | 9 | Euan CARMODY | 11 | Co Leeds | 22:21.58 |
| 6 | 7 | Llewelyn GARSIDE | 11 | Cleethorpes | 23:00.00 |
| 7 | 5 | Katie SADLER | 10 | Co Leeds | 23:04.72 |
| 8 | 3 | George RICKETTS | 11 | Co Leeds | 23:22.95 |
| 9 | 1 | Alana RANKIN | 11 | Co Leeds | 24:08.85 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 12 | Addison CROPPER | 11 | Co Leeds | 22:00.00 |
| 1 | 14 | Evelyn ATKINSON | 11 | Co Leeds | 21:43.07 |
| 2 | 16 | Isabelle PARK | 11 | Co Leeds | 21:30.00 |
| 3 | 18 | Eva SYLVESTER | 12 | Co Leeds | 21:30.00 |
| 4 | 20 | Livia STACEY | 12 | Co Leeds | 21:02.50 |
| 5 | 19 | Oliver BARKER | 11 | Co Leeds | 21:10.06 |
| 6 | 17 | Amelia MATSON | 12 | Co Leeds | 21:30.00 |
| 7 | 15 | Neve STAFFORD | 11 | Co Leeds | 21:30.00 |
| 8 | 13 | Madison SIMMONDS | 12 | Co Sheffield | 21:50.00 |
| 9 | 11 | Zoe FEATHER | 11 | Co Leeds | 22:03.76 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 22 | Ursula CARROLL | 12 | Stocksbridge | 20:54.00 |
| 1 | 24 | Angus YOUNG | 13 | Co Leeds | 20:43.62 |
| 2 | 26 | Olaf GRUDOWSKI | 13 | Co Leeds | 20:33.11 |
| 3 | 28 | Evie-Rose TOPPING | 13 | Co Leeds | 19:50.07 |
| 4 | 30 | Grace O'HARA | 12 | Co Leeds | 19:33.40 |
| 5 | 29 | Alfie CRAGGS | 13 | Co Leeds | 19:37.95 |
| 6 | 27 | Robyn HOWARD | 14 | Co Leeds | 20:13.14 |
| 7 | 25 | Oliver ATHA | 13 | Co Leeds | 20:40.20 |
| 8 | 23 | Willow WRIGHT | 11 | Co Leeds | 20:50.00 |
| 9 | 21 | Freya ELLIS | 12 | Co Leeds | 20:56.11 |