EVENT 309 Mens Open 1500m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 2 | Timothy Shuttleworth | 16 | Hatfield | 16:48.55 |
| 1 | 4 | Tom Derbyshire | 15 | StaffordApex | 16:44.79 |
| 2 | 6 | Thomas Millburn | 15 | Cockermouth | 16:43.90 |
| 3 | 8 | Thomas Diaper-Fox | 16 | Co South'ton | 16:40.79 |
| 4 | 10 | Jack Baister | 16 | Middlesboro | 16:25.92 |
| 5 | 9 | David Richardson | 16 | Warrington W | 16:36.85 |
| 6 | 7 | Julian Chan Quee Lin | 16 | Dulwich Dolp | 16:43.01 |
| 7 | 5 | Euan Murgatroyd | 16 | Dumfries | 16:43.99 |
| 8 | 3 | Paul Hentschel | 16 | SC Chemnitz | 16:46.00 |
| 9 | 1 | Albert Karavis | 16 | Windsor | 16:49.11 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 12 | Thomas Howley | 17 | Co Newcastle | 16:06.12 |
| 1 | 14 | Bradley Lynch | 17 | Co Birm'ham | 16:05.41 |
| 2 | 16 | Matthew Sleight | 18 | KingstonHull | 15:55.43 |
| 3 | 18 | James Gibson | 22 | Stockport Mo | 15:53.23 |
| 4 | 20 | Joseph Faulkner | 19 | Co Sheffield | 15:49.36 |
| 5 | 19 | Grant Quigley | 20 | Co Manch Aq | 15:51.25 |
| 6 | 17 | Alex Dunk | 18 | Prescot | 15:55.07 |
| 7 | 15 | Oliver Tennant | 20 | Swim Swansea | 16:01.17 |
| 8 | 13 | Oliver Bitowt | 18 | Lincoln Vulc | 16:05.94 |
| 9 | 11 | Archie Mitchell | 17 | Dulwich Dolp | 16:08.06 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 22 | Ferry Weertman | 21 | NED | 15:41.27 |
| 1 | 24 | Caleb Hughes | 18 | Hatfield | 15:40.29 |
| 2 | 26 | Thomas Sunter | 21 | Co Sheffield | 15:27.31 |
| 3 | 28 | Joel Knight | 18 | Millfield | 15:24.92 |
| 4 | 30 | Daniel Fogg | 26 | Loughboro Un | 14:55.30 |
| 5 | 29 | Jack Burnell | 20 | Loughboro Un | 15:20.13 |
| 6 | 27 | Martin Cremin | 22 | StirlingSwim | 15:26.10 |
| 7 | 25 | Stephen Milne | 19 | Perth City | 15:36.46 |
| 8 | 23 | Nicholas Grainger | 19 | Co Sheffield | 15:41.13 |
| 9 | 21 | Thomas Allen | 21 | Swansea Uni | 15:42.71 |