EVENT 308 Mixed 1500m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 2 | Sophia Xiu Hui KOK | 11 | Co Leeds | 23:11.20 |
| 1 | 4 | Charlotte BANKS | 12 | Welshpool | 23:00.00 |
| 2 | 6 | Anneliese CIRSTEA | 11 | Co Leeds | 22:49.99 |
| 3 | 8 | Olive MITCHELL | 11 | Co Leeds | 22:30.00 |
| 4 | 10 | Zac PHILLIPS | 11 | Co Leeds | 22:12.81 |
| 5 | 9 | Emma GLOSEK | 11 | Co Leeds | 22:30.00 |
| 6 | 7 | Nell HARGREAVES | 11 | Co Leeds | 22:33.86 |
| 7 | 5 | Anna GLOSEK | 13 | Co Leeds | 23:00.00 |
| 8 | 3 | Finnley JOHNSTONE | 11 | Co Leeds | 23:05.31 |
| 9 | 1 | Jacob CAWOOD | 11 | Co Leeds | 25:17.17 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 12 | Harrison WAKE | 13 | Co Leeds | 21:27.21 |
| 1 | 14 | Ayla CARRY | 12 | Co Leeds | 21:00.01 |
| 2 | 16 | Ted WINGFIELD | 11 | Co Leeds | 20:41.53 |
| 3 | 18 | Amelia MATSON | 13 | Co Leeds | 20:09.16 |
| 4 | 20 | Tristan CARRASCO RUIZ | 13 | Trafford Met | 19:47.51 |
| 5 | 19 | William SMITH | 13 | Co Bradford | 20:00.00 |
| 6 | 17 | George RICKETTS | 12 | Co Leeds | 20:35.12 |
| 7 | 15 | Evelyn GLEDHILL | 16 | Co Bradford | 20:53.10 |
| 8 | 13 | Eva SYLVESTER | 13 | Co Leeds | 21:11.57 |
| 9 | 11 | Liam LI | 11 | Co Leeds | 22:05.28 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 22 | Angus YOUNG | 14 | Co Leeds | 19:35.55 |
| 1 | 24 | Anya BABOVIC | 13 | Chester Le S | 19:02.20 |
| 2 | 26 | Maisie RAY | 15 | Co Bradford | 18:48.00 |
| 3 | 28 | William DUNN | 14 | Co Leeds | 18:22.94 |
| 4 | 30 | Oscar HUSSEY | 13 | Co Leeds | 18:04.40 |
| 5 | 29 | Joshua WHITTON | 15 | Chester Le S | 18:13.00 |
| 6 | 27 | Joseph HOYLE | 15 | Co Bradford | 18:45.00 |
| 7 | 25 | Jack WADE | 13 | Co Leeds | 19:00.00 |
| 8 | 23 | Addison CROPPER | 12 | Co Leeds | 19:16.84 |
| 9 | 21 | Pippa SMITH | 15 | Co Bradford | 19:45.00 |