28 August 1978 at Wrotham
| 340cc – Unlimited | LH Sidecars (2) | 500cc |
| 1- Simon Wigg | 1- Mick Turrell & Nick Pollard | 1- Brian Webb |
| 2- Brian Webb | 2- Jeremy Knight & Dave Apps | 2- Graham Hurry |
| 3- Roland Duke | 3- John Penfold & Bob Penfold | 3- Simon Wigg |
| LH Sidecars (1) | RH Sidecars (2) | RH Sidecars (1) |
| 1- Mick Turrell & Nick Pollard | 1- Len Diggins & ANOther | 1- A. Burdett & A. Rouse |
| 2- Ernie Penfold & Tom Penfold | 2- Alan Clark & Dave Pope | 2- Len Diggins & ANOther |
| 3- Jeremy Knight & Dave Apps | 3- B. Hatch & J. Butcher | 3- Alan Clark & Dave Pope |
| 350cc | Vintage (2) | 250cc |
| 1- Graham Hurry | 1- Colin Peters | 1- Brian Webb |
| 2- Gerald Short | 2- Mark Holder | 2- Ray Watson |
| 3- Lee Bird | 3- Paul Gasson | 3- Lee Bird |
| Vintage (1) | ||
| 1- Colin Peters | ||
| 2- Mark Holder | ||
| 3- Paul Gasson |