22 October 1978 at Old Romney
| 500cc | RH Sidecars (2) | 240c – 500cc |
| 1- Brian Webb | 1- Clyde Cardy & Martin Paul | 1- Brian Webb |
| 2- Steve Schofield | 2- Dave Manning & Peter Blanke | 2- Roland Duke |
| 3- Duncan Tolhurst | 3- D. Callison & G. Cook | 3- Steve Schofield |
| 350cc | RH Sidecars (1) | 250cc |
| 1- Keith Pritchard | 1- Dave Manning & Peter Blanke | 1- Martin Goodwin |
| 2- Chris Bartlett | 2- Clyde Cardy & Martin Paul | 2- Ray Watson |
| 3- Michael Andrews | 3- Len Diggins & Graham Stanley | 3- Steve Schofield |