11 May 1980 at Frittenden
| Unlimited | LH Sidecars (2nd) | 500cc |
| 1- David Spain | 1- Ernie Penfold & Nigel Shaw | 1- Steve Schofield |
| 2- Gary Hickmott | 2- Mick Turrell & Tony Stevens | 2- Martin Hagon |
| 3- Keith Richards | 3- John Penfold & Bob Penfold | 3- B. Smith |
| RH Sidecars (2nd) | LH Sidecars (1st) | RH Sidecars (1st) |
| 1- Ken Thorpe & George Carter | 1- Ernie Penfold & Nigel Shaw | 1- Ken Thorpe & George Carter |
| 2- Charlie Coleman & Adam Cowper-Smith | 2- John Penfold & Bob Penfold | 2- Charlie Coleman & Adam Cowper-Smith |
| 3- Rob Wilson & Vaughan Roberts | 3- Mick Turrell & Tony Stevens | 3- Brian Luker & David Day |
| 350cc | 250cc | |
| 1- David Spain | 1- Jeremy Doncaster | |
| 2- Martin Hagon | 2- Simon Whorlow | |
| 3- Lee Bird | 3- Martin Hagon |
22 April 1980 at Frittenden
| Unlimited | LH Sidecars (2nd) | 500cc |
| 1- Martin Hagon | 1- Mick Turrell & Tony Stevens | 1- Brian Webb |
| 2- Duncan Tolhurst | 2- Ernie Penfold & Nigel Shaw | 2- Martin Hagon |
| 3- Gary Hickmott | 3- John Penfold & Bob Penfold | 3- David Spain |
| RH Sidecars (2nd) | LH Sidecars (1st) | RH Sidecars (1st) |
| 1- Charlie Coleman & Adam Cowper-Smith | 1- Mick Turrell & Tony Stevens | 1- Rob Wilson & Vaughan Roberts |
| 2- Len Diggins & Graham Stanley | 2- Ernie Penfold & Nigel Shaw | 2- Len Diggins & Graham Stanley |
| 3- Rob Wilson & Vaughan Roberts | 3- Jim Penfold & Stephen Dempsey | 3- Charlie Coleman & Adam Cowper-Smith |
| 350cc | 250cc | |
| 1- Brian Webb | 1- Martin Hagon | |
| 2- Martin Hagon | 2- Keith Sivier | |
| 3- David Spain | 3- Martin Hook |