18 September 1977 at Hatch Beauchamp
| Unlimited (SW Centre Championship) | RH Sidecar (SW Centre Championship) | Experts |
| 1- D. Hole | 1- P. Robson & D. Hopes | 1- R. Eslick |
| 2- R. Eslick | 2- T. Skinner & K. Holifield | 2- M. Davis |
| 3- R. Wood | 3- T. Millard & J. Holt | 3- R. Wood |
| Over 350cc | RH Sidecar Unlimited (2) | 250cc |
| 1- D. Hole | 1- P. Robson & D. Hopes | 1- R. Eslick |
| 2- D. Threadington | 2- G. Wheeler & S. Rattenbury | 2- R. Wood |
| 3- S. Cox | 3- D. Parsons & B. Parsons | 3- N. Farnish |
| RH Sidecar Unlimited (1) | Juniors | RH Sidecar Experts |
| 1- P. Robson & D. Hopes | 1- C. Sheppard | 1- T. Skinner & K. Holifield |
| 2- G. Wheeler & S. Rattenbury | 2- C. Pomphrey | 2- P. Robson & D. Hopes |
| 3- T. Millard & J. Holt | 3- R. Dunford | 3- G. Wheeler & S. Rattenbury |
| RH Sidecar Juniors | ||
| 1- A. Roppert & G. Maunder | ||
| 2- L. Thompson & P. Rogers | ||
| 3- D. Yates & H. Sinclair |
10 July 1977 at Blagdon
| Unlimited | RH Sidecar Unlimited (3) | Experts |
| 1- Ian Barclay | 1- R. Pederby & ANOther | 1- C. Hendriksen |
| 2- D. Hole | 2- M. Heal & T. Seymour | 2- D. Hole |
| 3- C. Hendriksen | 3- A. Roppert & L. Harris | 3- J. Smith |
| 350cc | RH Sidecar Expert | 250cc |
| 1- D. Hole | 1- P. Dyer & D. Harris | 1- R. Wood |
| 2- D. Threadingham | 2- R. Pederby & ANOther | 2- Neil Farnish |
| 3- Neil Farnish | ANOther | 3- P. Fry |
| RH Sidecar Unlimited (2) | Juniors | RH Sidecar Unlimited (1) |
| 1- R. Pederby & ANOther | 1- M. Courage | 1- R. Pederby & ANOther |
| 2- M. Heal & T. Seymour | 2- S. Cox | 2- R. Cant & P. Stokes |
| ANOther | 3- B. Waters | 3- P. Dyer & D. Harris |
| RH Sidecar Juniors | ||
| 1- M. Heal & T. Seymour | ||
| 2- A. Roppert & L. Harris | ||
| 3- R. Stephens & F. Albiges |