1 October 1978 at Newdigate
| Unlimited | LH Sidecars (2) | Unlimited (351-650) |
| 1- David Spain | 1- Mick Tyrrell & Tony Strevens | 1- Duncan Tolhurst |
| 2- Barry Hazleton | 2- Alan Luker & Andy Maxted | 2- Steve Schofield |
| 3- Steve Schofield | 3- Cliff Carter & Gary Ruffle | 3- Lee Bird |
| 350cc | RH Sidecars (2) | 250cc |
| 1- Lee Bird | 1- C. Coleman & D. Redmond | 1- Colin Packman |
| 2- Barry Hazleton | 2- Brian Luker & David Day | 2- Steve Schofield |
| 3- David Spain | 3- Jim Penfold & V. Roberts | 3- Bernie Edwards |
| RH Sidecars (1) | LH Sidecars (1) | |
| Not Known | 1- Mick Tyrrell & Tony Strevens | |
| 2- Ernie Penfold & Tom Penfold | ||
| 3- Alan Luker & Andy Maxted |