| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Charlie Brotherston | 11 | Wellingboro | 4:06.93 |
| 3 | 5 | Daniel Rees | 12 | Daventry | 3:27.59 |
| 4 | 9 | James Oscroft | 10 | Northampton | 3:15.86 |
| 5 | 7 | Jack Webb | 12 | Wellingboro | 3:26.04 |
| 6 | 3 | Rahul Reedha | 10 | Corby | 3:34.54 |
| Heat Number - 2 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 2 | Charlie Husbands | 10 | Wellingboro | 3:54.81 |
| 3 | 6 | Owen Hemmings-Kneller | 12 | Wellingboro | 3:26.70 |
| 4 | 10 | Jack Tindle | 11 | Northampton | 3:15.56 |
| 5 | 8 | Reuben Tipping | 12 | Northampton | 3:25.51 |
| 6 | 4 | Isaac James | 12 | Wellingboro | 3:34.38 |