3 August 1980 at Sandford
| 500cc | RH Sidecars | 350cc |
| 1- Peter Carr | 1- Steve Smith & Trevor Pye | 1- Steve Schofield |
| 2- Jeremy Doncaster | 2- Alan Artus & F. Burge | 2- Alan Gardiner |
| 3- Mike Garrad | 3- Pete Robson & Clive Fry | 3- Mick Nicholson |
| 250cc | ||
| 1- Dave Baybutt | ||
| 2- Mick Nicholson | ||
| 3- Ian Rutter |