7 July 1978
| Unlimited | LH Sidecars (2) | 500cc |
| 1- Marc Edwards | 1- John Penfold & Bob Penfold | 1- Alan Martin |
| 2- Keith Potts | 2- Mick Turrell & Nigel Pollard | 2- Keith Potts |
| 3- Michael Brown | 3- Ernie Penfold & Pete Titley | 3- Chris Bartlett |
| 350cc | LH Sidecars (1) | 250cc |
| 1- Chris Bartlett | 1- Ernie Penfold & Pete Titley | 1- Steve Schofield |
| 2- Brian Hansford | 2- John Penfold & Bob Penfold | 2- Ray Watson |
| 3- Martin Mountfort | 3- Mick Turrell & Nigel Pollard | 3- Keith Potts |