8 October 1978 at Egerton
| Unlimited | LH Sidecars (2) | 500cc |
| 1- Roland Duke | 1- Ernie Penfold & Tom Penfold | 1- Roland Duke |
| 2- Brian Webb | 2- Mick Turrell & Tony Strevens | 2- Brian Webb |
| 3- Michael Andrews | 3- Eric Tysoe & Terry Pachol | 3- Michael Andrews |
| 250cc – 350cc | LH Sidecars (1) | 250cc |
| 1- Roland Duke | 1- Dave Penfold & Colin Cook | 1- Roland Duke |
| 2- Richard Wakeling | 2- Mick Turrell & Tony Strevens | 2- Bernie Edwards |
| 3- John Rowney | 3- Alan Luker & Andy Maxted | 3- Keith Richards |
30 July 1978 at Egerton
| Unlimited | Dave Bache Trophy | 490cc – 500cc |
| 1- Graham Hurry | 1- Ernie Penfold & Tom Penfold | 1- Graham Hurry |
| 2- Brian Webb | 2- John Penfold & Bob Penfold | 2- Brian Webb |
| 3- Kevin Gleadow | 3- Mick Turrell & Nigel Pollard | 3- Martin Hagon |
| 250cc – 350cc | LH Sidecars (1) | 250cc |
| 1- Graham Hurry | 1- Ernie Penfold & Tom Penfold | 1- Martin Hagon |
| 2- Roland Duke | 2- John Penfold & Bob Penfold | 2- Stephen Davies |
| 3- Keith Pritchard | 3- Mick Turrell & Nigel Pollard | 3- Martin Goodwin |
| LH Sidecars (2) | ||
| Not Known |