24 September 1978 at Wiston
| Unlimited | LH Sidecars (2) | 500cc |
| 1- Duncan Tolhurst | 1- Ernie Penfold & Tom Penfold | 1- Duncan Tolhurst |
| 2- Keith Richards | 2- Mick Turrell & Tony Strevens | 2- Steve Schofield |
| 3- Lee Bird | 3- Dave Penfold & Colin Cook | |
| 350cc | LH Sidecars (1) | 250cc |
| Not Known | Not Known | 1- Ray Watson |
| 2- Steve Schofield | ||
| 3- Martin Hook |