| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 2 | Jack Smith | 12 | Leic Sharks | 5:55.20 |
| 2 | 4 | Brodie Butlin | 13 | Nova Cent'n | 5:41.22 |
| 3 | 6 | Joseph Storr | 13 | Leic Sharks | 5:38.10 |
| 4 | 8 | Frank Lamb | 13 | South Lincs | 5:32.10 |
| 5 | 7 | Jacob Fish | 13 | Grantham | 5:32.30 |
| 6 | 5 | Jack Hurry | 13 | Northampton | 5:40.56 |
| 7 | 3 | Finley O'Neill | 13 | Radford | 5:54.70 |
| 8 | 1 | Freddie Burdett | 12 | Co Leicester | 6:07.00 |