EVENT 304 Mens Open 1500m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 1 | Luke Elliott | 99 | South Lincs | 16:50.17 |
| 2 | 3 | Lewis Kerrod | 00 | Co Leicester | 16:49.21 |
| 3 | 5 | Jacob Butterfield | 00 | Co Leeds | 16:47.06 |
| 4 | 7 | Cameron Croot | 99 | Swansea Aq | 16:32.75 |
| 5 | 6 | Jamie Scholes | 00 | Co Peterboro | 16:41.38 |
| 6 | 4 | Joseph Iacovides | 99 | Co Coventry | 16:48.87 |
| 7 | 2 | Max McCusker | 99 | Millfield | 16:49.43 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 9 | Albert Karavis | 97 | Windsor | 16:26.00 |
| 2 | 11 | Alex Fry | 98 | Prescot | 16:22.45 |
| 3 | 13 | Ashley Hogg | 98 | Stockport Mo | 16:21.80 |
| 4 | 15 | Max Murphy | 00 | Co Milton K | 16:20.03 |
| 5 | 14 | Samuel Budd | 98 | Co Sheffield | 16:21.34 |
| 6 | 12 | Thomas Millburn | 98 | Cockermouth | 16:22.35 |
| 7 | 10 | Zak Logue | 98 | Co Sund'land | 16:25.46 |
| 8 | 8 | Luke Thomas | 97 | Wycombe Dist | 16:28.41 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 17 | Ross Hill | 97 | Chase | 16:09.31 |
| 2 | 19 | Nathan Hughes | 00 | Hatfield | 16:05.94 |
| 3 | 21 | Thomas Nelson | 96 | Wirral Metro | 15:55.95 |
| 4 | 23 | Archie Mitchell | 96 | Co Sheffield | 15:48.83 |
| 5 | 22 | Timothy Shuttleworth | 97 | Hatfield | 15:52.05 |
| 6 | 20 | Jack Baister | 97 | Middlesboro | 15:59.17 |
| 7 | 18 | George Taplin | 99 | Hillingdon | 16:06.07 |
| 8 | 16 | Harrison Coulter | 99 | Stockport Mo | 16:11.11 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 25 | Angus Barr | 98 | Eastkilbride | 15:41.73 |
| 2 | 27 | Tom Derbyshire | 98 | Royal Wolv | 15:38.88 |
| 3 | 29 | Jay Lelliott | 95 | Bath Univ | 14:58.74 |
| 4 | 31 | Stephen Milne | 94 | Perth City | 14:53.83 |
| 5 | 30 | Daniel Jervis | 96 | Swansea Aq | 14:55.33 |
| 6 | 28 | Caleb Hughes | 95 | Loughboro Un | 15:32.48 |
| 7 | 26 | Tobias Robinson | 96 | Loughboro Un | 15:41.70 |
| 8 | 24 | Alex Dunk | 95 | Prescot | 15:47.78 |