20 April 1980 at Cranham
| Roger Parker Trophy | Invited Riders | 500cc Support |
| 1- Mike Garrard | 1- Simon Wigg | 1- Keith Curtis |
| 2- Simon Wigg | 2- Chris Baybutt | 2- Gerry Smith |
| 3- Chris Baybutt | 3- Don Godden | 3- D. Simpson |
| 250cc | ||
| 1- Jeremy Doncaster | ||
| 2- Mark Wadsworth | ||
| 3- Marytin Hagon |