7 September 1980 at Clyst St. Mary
| 500cc | 350cc | 250cc |
| 1- Trevor Banks | 1- Steve Schofield* | 1- Jeremy Doncaster |
| 2- Chris Baybutt | 2- John Underwood* | 2- Bernie Leigh |
| 3- Jeremy Doncaster | 3- Chris Pidcock* | 3- Clayton Williams |
| 4- Alan Gardiner | 4- Clayton Williams | 4- Keith Richards |
| 5- Simon Wigg | 5- David Spain | 5- Martin Scarisbrick |
| 6- Bernie Leigh | 6- Andy Challinor | 6- Mark Nicholson |
| RH Sidecars | 500cc (On Day) | 500cc Sidecars |
| 1- Steve Smith & Trevor Pye* | 1- Simon Wigg | 1- Steve Smith & Trevor Pye |
| 2- Ken Jones & Steve Wheeler* | 2- Trevor Banks | 2- Ken Smith & Dave Brown |
| 3- Steve Dewison & Martin Paul | 3- Martin Goodwin | 3- Trevor Higgs & Bob Knights |
| 4- Roger Measor & Jeff Measor | 4- Clyde Cardy & Allan Morrison | |
| 5- Terry Skinner & Bob Smith | 350cc (On Day) | 5- John Burroughs & Greg Clark-Ward |
| 6- Alan Blewitt & Dave Williamson | 1- Chris Pidcock | 6- Dick Barton & Shaun Osmond |
| 2- Clayton Williams | ||
| RH Sidecars (On Day) | 3- Tony Briggs | 500cc Sidecars (On Day) |
| 1- Ken Jones & Steve Wheeler | 1- Steve Smith & Trevor Pye | |
| 2- Alan Blewitt & Dave Williamson | 250cc (On Day) | 2- Clyde Cardy & Allan Morrison |
| 3- Roger Measor & Jeff Measor | 1- Bernie Leigh | 3= John Burroughs & Greg Clark-Ward |
| 2- Clayton Williams | 3= Ken Smith & Dave Brown | |
| For the First Leg: See Evesham | 3- Jeremy Doncaster | |
| For the Second Leg: See Portsmouth | * Championships decided by Run-offs |
6 July 1980 at Clyst-St-Mary
| 500cc | RH Sidecars | 350cc |
| 1- Simon Wigg | 1- Rob Stoneman & Rowland Broomfield | 1- Steve Schofield |
| 2- Neil Farnish | 2- Dennis Teasdale & Keith Chapman | 2- Alan Gardiner |
| 3- Mike Garrad | 3- Smith Smith & Trevor Pye | 3- Terry Birkumshaw |
| LH Sidecars | ||
| 1- John Penfold & Bob Penfold | ||
| 2- Ernie Penfold & Nigel Shaw | ||
| 3- Dave Roberts & David Abbott |