| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Caiden Mattison | 11 | Sherwood | 4:09.28 |
| 3 | 2 | Samuel Potter | 11 | Bircotes SC | 3:44.90 |
| 4 | 3 | Georgi Bashford | 13 | Co Lincoln P | 3:25.90 |
| Heat Number - 2 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Archie King | 14 | Bircotes SC | 3:20.00 |
| 2 | 7 | William Parnell | 14 | Co Lincoln P | 2:52.66 |
| 3 | 9 | Henry Crust | 16 | Co Lincoln P | 2:30.77 |
| 4 | 8 | Harry Brancham | 14 | Retford | 2:35.60 |
| 5 | 6 | Joby Mannie Evans | 13 | Sherwood | 3:00.90 |
| 6 | 4 | Oliver Richmond | 12 | Sherwood | 3:23.90 |