EVENT 101 Mixed 800m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 2 | Laura JONES | 12 | Clitheroe | 12:47.00 |
| 1 | 4 | Paige BORLAND | 12 | Bo Kirklees | 12:27.50 |
| 2 | 6 | Owen TEMPEST | 12 | Co Leeds | 12:12.86 |
| 3 | 8 | Alfie CRAGGS | 12 | Co Leeds | 12:00.00 |
| 4 | 10 | Angus YOUNG | 12 | Co Leeds | 12:00.00 |
| 5 | 9 | Demilade AYEMOWA | 13 | Co Leeds | 12:00.00 |
| 6 | 7 | Hannah BROWN | 13 | Co Leeds | 12:06.36 |
| 7 | 5 | Matilda CAREY | 12 | Leyland Barr | 12:18.30 |
| 8 | 3 | Jad IDRIS | 17 | Co Leeds | 12:30.00 |
| 9 | 1 | Tom JONES | 12 | Clitheroe | 12:58.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 12 | Eve SIMMONDS | 14 | Co Wakefield | 12:00.00 |
| 1 | 14 | A HARRISON-STOKES | 13 | Co Wakefield | 12:00.00 |
| 2 | 16 | Natasha QUASHIE | 14 | Bo Kirklees | 11:56.34 |
| 3 | 18 | Rory KING | 13 | Co Wakefield | 11:50.71 |
| 4 | 20 | Molly TINDALL | 15 | Leyland Barr | 11:39.60 |
| 5 | 19 | Dacil WATERS | 13 | Harrogate | 11:45.00 |
| 6 | 17 | Annabel GALBRAITH | 13 | Co Leeds | 11:55.33 |
| 7 | 15 | Hussein KESSERWAN | 12 | Bo Kirklees | 11:56.60 |
| 8 | 13 | Evie Mae WALLACE | 12 | Co Leeds | 12:00.00 |
| 9 | 11 | Ellie SHIELD | 13 | Co Wakefield | 12:00.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 22 | Jessica HOLDING | 17 | Leyland Barr | 11:31.10 |
| 1 | 24 | Kareem ALTURK | 13 | Co Salford | 11:28.90 |
| 2 | 26 | Nicholas CASS | 13 | Bo Kirklees | 11:21.60 |
| 3 | 28 | Jake ATHA | 13 | Harrogate | 11:15.00 |
| 4 | 30 | Evie-Rose TOPPING | 12 | Co Leeds | 11:06.65 |
| 5 | 29 | Ruby WHITESIDE | 12 | Co Salford | 11:09.20 |
| 6 | 27 | Jackson CLARKE | 13 | Co Leeds | 11:15.86 |
| 7 | 25 | Samuel WILSON | 12 | Ramsbottom | 11:25.00 |
| 8 | 23 | Imogen CLARKSON | 12 | Clitheroe | 11:30.00 |
| 9 | 21 | Noah DARNELL | 12 | Co Leeds | 11:31.47 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 32 | Fern STANLEY-SMITH | 14 | Bo Kirklees | 11:05.13 |
| 1 | 34 | Oliver FRARY | 14 | Scunthorpe A | 11:00.00 |
| 2 | 36 | Ava CONNELL | 14 | Co Leeds | 11:00.00 |
| 3 | 38 | Jacob IRVING | 12 | Everton | 10:58.00 |
| 4 | 40 | George CARRY | 15 | Co Leeds | 10:53.98 |
| 5 | 39 | Tylan FLETCHER | 14 | Co Leeds | 10:56.44 |
| 6 | 37 | Isabella GRIMBALDESTON | 13 | Leyland Barr | 10:58.40 |
| 7 | 35 | Lee SCHOLES | 13 | Co Salford | 11:00.00 |
| 8 | 33 | Ben BEDFORD | 14 | Clitheroe | 11:00.39 |
| 9 | 31 | Ella COLEMAN | 12 | Co Leeds | 11:05.93 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 42 | Darcey BLACKER | 15 | Co Leeds | 10:53.50 |
| 1 | 44 | Ella JORDAN | 13 | Co Leeds | 10:51.10 |
| 2 | 46 | Archie HONEY | 12 | Blackpool Aq | 10:45.00 |
| 3 | 48 | Eva LUCKHURST | 16 | Preston | 10:40.20 |
| 4 | 50 | James THOMSON | 14 | Co Leeds | 10:37.10 |
| 5 | 49 | Emily HYDER | 14 | Ramsbottom | 10:40.00 |
| 6 | 47 | Ollie ROBINSON | 14 | Co Salford | 10:40.40 |
| 7 | 45 | Poppy NUTTMAN | 13 | Bo Kirklees | 10:49.02 |
| 8 | 43 | Alfie YOUNG | 14 | Co Leeds | 10:51.90 |
| 9 | 41 | Ruby ELLIS | 15 | Co Leeds | 10:53.71 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 52 | Amaja WATERS | 12 | Harrogate | 10:25.00 |
| 1 | 54 | Harry GILLIGAN | 16 | Bo Kirklees | 10:22.50 |
| 2 | 56 | Oliver BARRETT | 12 | Co Leeds | 10:21.90 |
| 3 | 58 | Matei STOICESCU | 13 | Co Leeds | 10:21.20 |
| 4 | 60 | Matthew SMITH | 15 | Clitheroe | 10:15.00 |
| 5 | 59 | Daisy BALL | 15 | Co Wakefield | 10:15.80 |
| 6 | 57 | Honor LUCKHURST | 14 | Preston | 10:21.20 |
| 7 | 55 | Serena STANDRING | 13 | Winsford | 10:22.10 |
| 8 | 53 | Ed PEARSON | 12 | Io Man | 10:23.20 |
| 9 | 51 | Shae BRYANT | 12 | Co Leeds | 10:26.36 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 62 | Connor MCCULLEN | 13 | Co Leeds | 9:58.30 |
| 1 | 64 | Andrew TEALE | 15 | Bo Kirklees | 9:53.97 |
| 2 | 66 | Samuel HILL | 14 | Co Leeds | 9:33.09 |
| 3 | 68 | Patrick O'HARA | 13 | Co Leeds | 9:22.00 |
| 4 | 70 | Alfie CHARLTON | 14 | Harrogate | 9:17.90 |
| 5 | 69 | Luke DYER | 16 | Co Leeds | 9:20.10 |
| 6 | 67 | Arthur OWENS | 14 | Co Leeds | 9:25.39 |
| 7 | 65 | James FARNAN | 13 | Io Man | 9:53.90 |
| 8 | 63 | Matthew MENZER | 16 | Co Wakefield | 9:56.80 |
| 9 | 61 | S LAZENBY-TRACEY | 17 | Stretford | 9:59.70 |