EVENT 304 Open/Male 1500m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 2 | William Kite | 15 | Louth | 18:40.80 |
| 2 | 4 | Edward Oscroft | 15 | Northampton | 18:29.70 |
| 3 | 6 | Isaac Ebanks | 14 | Derby Excel | 18:07.88 |
| 4 | 8 | William Vere | 15 | South Lincs | 17:52.46 |
| 5 | 7 | Joel Harby | 15 | Nova Cent'n | 18:06.50 |
| 6 | 5 | Lawrence Chapman | 16 | Worksop | 18:16.70 |
| 7 | 3 | Jack Hicks | 15 | Lincoln Vulc | 18:34.79 |
| 8 | 1 | Ryan Coles | 19 | Daventry | 18:44.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 10 | Lucas Kimber | 15 | Derby Excel | 17:39.20 |
| 2 | 12 | Brodie Butlin | 15 | Nova Cent'n | 17:32.16 |
| 3 | 14 | Finley Dare | 15 | Corby | 17:05.68 |
| 4 | 16 | Samuel Green | 14 | Bassetlaw SS | 16:51.20 |
| 5 | 15 | William Oxley | 14 | Co Leicester | 16:57.26 |
| 6 | 13 | Jacson Crabb | 13 | Co Leicester | 17:27.79 |
| 7 | 11 | Albert Malsher | 21 | Rushden | 17:36.64 |
| 8 | 9 | Matteo Monaco | 15 | South Lincs | 17:44.16 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 18 | Noah Van Hoorebeek | 17 | Chesterfield | 16:39.19 |
| 2 | 20 | David Coyle | 19 | Nova Cent'n | 16:38.03 |
| 3 | 22 | Daniel Walker | 17 | Nova Cent'n | 16:20.13 |
| 4 | 24 | Nathan Wiffen | 23 | Lboro Uni | 14:48.69 |
| 5 | 23 | Daniel Harris | 17 | Co Leicester | 16:19.82 |
| 6 | 21 | Manav Mistry | 17 | Northampton | 16:34.20 |
| 7 | 19 | Oliver Davies | 15 | Co Leicester | 16:38.61 |
| 8 | 17 | Jack Hurry | 15 | Northampton | 16:50.10 |