20 August 1978 at Sandon, Chelmsford
| RH Sidecars | 500cc Sidecars |
| 1- Steve Smith & Trevor Pye / | 1- Rob Stoneman & Rowland Broomfield |
| Richard Peberdy & Jim Head | Roger Measor & Stuart Rattenbury |
| 2- Colin Banks & Wally Brammer / | 2- Bob Attwell & Tony Attwell / |
| Roger Measor & R. Olive | Dick Evans & Kevin Day |
| 3- Rob Stonerman & Rowland Broomfield / | 3- Norman Bailey & Denis Smith / |
| Gerry Wheeler & Stuart Rattenbury | ANOther |
| Open RH Sidecars | Open 500cc Sidecars |
| 1- Ted Tucker & Dave Ward | 1- Rob Stoneman & Rowland Broomfield |
| 2- Terry Skinner & Steve Marton | 2- Malcolm Chinnery & Mick Skeels |
| 3- Ted Scott & John Atkinson | 3- Dick Evans & Kevin Day |