| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Reuben Meadows | 12 | Retford | 1:45.00 |
| 3 | 3 | Samuel Potter | 12 | Bircotes SC | 1:28.00 |
| 4 | 2 | Thomas Collins | 12 | Retford | 1:34.30 |
| Heat Number - 2 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | James Thomas | 12 | Gainsborough | 1:22.02 |
| 2 | 7 | Isaac Shaw | 15 | Newark | 1:17.14 |
| 3 | 9 | Harry McKeaney | 15 | Sutton | 1:03.75 |
| 4 | 8 | Samuel Green | 12 | Retford | 1:13.76 |
| 5 | 6 | C Butterell-Quanbrough | 12 | Retford | 1:21.30 |
| 6 | 4 | Noah Dewsnap | 11 | Retford | 1:26.36 |