EVENT 102 Mixed 1500m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 1 | Muhammad RAZA | 12 | Co Leeds | 23:58.90 |
| 1 | 3 | Lauren MCMANUS | 16 | Eckington | 22:59.30 |
| 2 | 5 | Barney HOBBS | 12 | Co Leeds | 22:30.00 |
| 3 | 7 | Freya HOBLEY | 13 | Scunthorpe A | 22:29.57 |
| 4 | 9 | Jacob JONES | 12 | Co Leeds | 21:30.00 |
| 5 | 8 | Yarah GHAZAL | 13 | Lancaster | 22:26.30 |
| 6 | 6 | Ellis HARGREAVES | 12 | Co Leeds | 22:30.00 |
| 7 | 4 | George KING | 12 | Co Leeds | 22:30.00 |
| 8 | 2 | Tomas BICKERS | 12 | Co Leeds | 23:01.66 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 11 | Amelia MATSON | 12 | Co Leeds | 21:00.00 |
| 1 | 13 | Amit MALTZ | 14 | Harrogate | 20:56.38 |
| 2 | 15 | Emily MCSEVENY | 14 | York City | 20:30.00 |
| 3 | 17 | Jake ATHA | 14 | Harrogate | 19:37.80 |
| 4 | 19 | Annabelle HARRISON | 14 | Bo Barnsley | 19:30.00 |
| 5 | 18 | Abigail JAMES | 15 | York City | 19:35.90 |
| 6 | 16 | Reuben HARRISON | 14 | Co Leeds | 20:20.87 |
| 7 | 14 | Oscar MILLETT | 13 | Bolton | 20:55.00 |
| 8 | 12 | Jessica ROLLINGS | 12 | Co Leeds | 21:00.00 |
| 9 | 10 | Harrison WAKE | 12 | Co Leeds | 21:30.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 21 | Oscar HUSSEY | 12 | Co Leeds | 19:22.80 |
| 1 | 23 | Seth CHARLESWORTH | 13 | Co Sheffield | 19:15.50 |
| 2 | 25 | Sophie SMITH | 13 | Co Sheffield | 19:10.42 |
| 3 | 27 | Callum RAVEN | 16 | Co Leeds | 19:06.33 |
| 4 | 29 | Pollyanna KERSHAW | 14 | Blackpool Aq | 19:04.55 |
| 5 | 28 | Amaja WATERS | 13 | Harrogate | 19:04.80 |
| 6 | 26 | Holly HARRISON | 14 | Co Leeds | 19:08.52 |
| 7 | 24 | Samantha TAYLOR | 13 | York City | 19:15.00 |
| 8 | 22 | Naomi TALBOT | 15 | Bolton | 19:20.00 |
| 9 | 20 | Leo LI | 12 | Co Leeds | 19:23.40 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 31 | Evie BREEZE | 15 | Bolton Metro | 18:54.80 |
| 1 | 33 | Emily ENGLAND-HALL | 12 | Co Leeds | 18:48.40 |
| 2 | 35 | Tymofii BORSHCHENKO | 15 | RichmondDale | 18:42.84 |
| 3 | 37 | Jacob IRVING | 13 | Co Liverpool | 18:36.77 |
| 4 | 39 | Keira JOHNSON | 14 | Bolton | 18:27.00 |
| 5 | 38 | Jeffrey LANGE | 13 | Co Leeds | 18:30.10 |
| 6 | 36 | Jackson CLARKE | 14 | Co Leeds | 18:38.70 |
| 7 | 34 | Oliver BARRETT | 13 | Co Leeds | 18:45.20 |
| 8 | 32 | Huseyin Yigit ILHAN | 14 | Haringey | 18:52.54 |
| 9 | 30 | Rosie BROGDEN | 12 | Co Leeds | 19:00.00 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 41 | Mark OWEN | 15 | Bolton | 18:10.98 |
| 1 | 43 | Oliver NUTTER | 16 | Burnley BOBC | 18:05.41 |
| 2 | 45 | Isabelle HALL | 13 | Co Leeds | 17:57.16 |
| 3 | 47 | Matthew JAMES | 16 | Co Leeds | 17:35.52 |
| 4 | 49 | Millie THRELFALL | 15 | Co Leeds | 17:26.97 |
| 5 | 48 | William WILSON | 14 | Co Leeds | 17:31.38 |
| 6 | 46 | Matthew JUST | 16 | Co Leeds | 17:52.86 |
| 7 | 44 | Elizabeth WARNER | 14 | Co Leeds | 18:00.00 |
| 8 | 42 | Isabel HANDLEY | 15 | Co Leeds | 18:10.18 |
| 9 | 40 | William KERSHAW | 14 | Blackpool Aq | 18:22.42 |