EVENT 102 Boy/Girl Open 1500m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 2 | Pollyanna Kershaw | 12 | Blackpool Aq | 20:29.48 |
| 2 | 4 | Annabelle Rogan | 13 | Wirral Metro | 20:02.60 |
| 3 | 6 | Olivia O'Mahony | 14 | Cockermouth | 19:21.80 |
| 4 | 8 | Henry Taylor | 14 | Stockport Mo | 18:56.80 |
| 5 | 7 | Sebastian Ebanks | 15 | Chase | 19:01.50 |
| 6 | 5 | Jennifer Walker | 14 | Bassetlaw SS | 19:31.10 |
| 7 | 3 | Lauren Watson | 13 | Wigan BEST | 20:03.00 |
| 8 | 1 | William Kershaw | 12 | Blackpool Aq | 20:32.80 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 10 | Sedona Reed | 15 | Co Leeds | 18:51.35 |
| 2 | 12 | Abigail Heald | 17 | Co Leeds | 18:49.39 |
| 3 | 14 | Gia Hothersall | 16 | Wirral Metro | 18:42.10 |
| 4 | 16 | Rachel Webb | 15 | Bassetlaw SS | 18:33.90 |
| 5 | 15 | Sophie Grindley | 17 | Winsford | 18:36.70 |
| 6 | 13 | Cara Tohill | 15 | Co Salford | 18:45.10 |
| 7 | 11 | Charlotte Moreton | 14 | Co Leeds | 18:51.19 |
| 8 | 9 | Alfie Edwards | 15 | Chase | 18:55.30 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 18 | Megan Pendleton | 16 | Wirral Metro | 18:31.50 |
| 2 | 20 | Aidan Turner | 13 | Tynemouth | 18:29.40 |
| 3 | 22 | Harvey Reed | 15 | Chase | 18:13.20 |
| 4 | 24 | Mollie Fisher | 17 | Rotherham Mo | 18:09.70 |
| 5 | 23 | Lauren Jones | 17 | Warrington W | 18:10.90 |
| 6 | 21 | Kerry Hennie | 14 | Warrington W | 18:21.40 |
| 7 | 19 | Megan Rickels | 14 | Warrington W | 18:29.80 |
| 8 | 17 | Natasha McDonnell | 16 | Wirral Metro | 18:33.60 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 26 | George Turner | 15 | Tynemouth | 17:55.50 |
| 2 | 28 | Olivia Sheehan | 17 | Wigan BEST | 17:45.47 |
| 3 | 30 | Sophie Traill | 15 | Stockport Mo | 17:34.20 |
| 4 | 32 | Adam Wright | 16 | Winsford | 17:32.00 |
| 5 | 31 | Samuel Smith | 15 | Skipton | 17:33.13 |
| 6 | 29 | Ella Blocksidge | 16 | Co Salford | 17:34.86 |
| 7 | 27 | Amelia Brian | 17 | Ellesmere Co | 17:45.94 |
| 8 | 25 | Alexandra Bulat | 16 | Lincoln Vulc | 18:05.70 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 34 | Kyle Offer | 18 | Co Coventry | 17:11.80 |
| 2 | 36 | Finlay Pope | 15 | Stockport Mo | 17:01.50 |
| 3 | 38 | Luke Critchlow | 17 | Stockport Mo | 16:41.80 |
| 4 | 40 | Patrick Braddock | 18 | Oldham Aqua | 16:35.00 |
| 5 | 39 | Samuel Grimes | 16 | Wigan BEST | 16:38.60 |
| 6 | 37 | Archie Neaves | 17 | Ellesmere Co | 16:53.30 |
| 7 | 35 | Lewis Turner | 16 | Winsford | 17:01.70 |
| 8 | 33 | Thomas Hudson | 15 | Nuneaton | 17:30.50 |