13 July 1980 at New Romney
| Unlimited (2) | RH Sidecars (2) | Unlimited (1) |
| 1- Jeremy Doncaster | 1- Ken Thorpe & George Carter | 1- Brian Webb |
| 2- Duncan Tolhurst | 2- Terry Skinner & Bob Smith | 2- Jeremy Doncaster |
| 3- Graham Hurry | 3- Steve Dewison & Martin Paul | 3- Duncan Tolhurst |
| LH Sidecars (1) | LH Sidecars (2) | RH Sidecars (1) |
| 1- Mick Turrell & Tony Strevens | 1- John Penfold & Bob Penfold | 1- Dave Heath & Ray Andrews |
| 2- Ernie Penfold & Nigel Shaw | 2- Barrie Warren & Robin Geer | 2- Steve Dewison & Martin Paul |
| 3- John Penfold & Bob Penfold | 3- Chris Ormerod & Brian Metson | 3- Stuart Jukes & Steve Martin |
| 350cc | 250cc | |
| 1- Brian Webb | 1- Jeremy Doncaster | |
| 2- Duncan Tolhurst | 2- Mark Lewis | |
| 3- John Britcher | 3- Richard Jenner |
8 June 1980 at New Romney
| Unlimited (Martyn Piddock Trophy) | LH Sidecars (2) | 250cc (Martyn Piddock Trophy) |
| 1- Brian Webb | 1- Alan Luker & David Sceats | 1- Colin Packman |
| 2- Steve Schofield | 2- Dave Steer & Alan Marshall | 2- Bernie Edwards |
| 3- David Spain | 3- Anthony Wellstead & Brian Wellstead | 3- Andrew Lee-Amies |
| Unlimited (2) | LH Sidecars (1) | 350cc |
| 1- Brian Webb | 1- John Penfold & Bob Penfold | 1- Martin Hagon |
| 2- Steve Schofield | 2- Jim Penfold & Stephen Dempsey | 2- Brian Webb |
| 3- Gary Hickmott | 3- Dave Fielding & Tony Lindus | 3- Keith Pritchard |