27 July 1980 at Cross Houses
| 500cc | RH Sidecars | 350cc |
| 1- Terry Owen | 1- Len Foreman & Steve Burdett | 1- Andy Challinor |
| 2- Peter Lloyd | 2- Colin Jones & Willie Griffiths | 2- Brian Evans |
| 3- Andy Challinor | 3- Gordon Matthews & Alan Harley | 3- Steve Deeran |
| 250cc | ||
| 1- Ian Rutter | ||
| 2- Simon Jones | ||
| 3- Ron Radcliffe |