29 September 1973 at Plox Green
| Unlimited (Championship) | RH Sidecars (Championship) | Unlimited |
| 1- T. Challinor | 1- P. Hill & B. Haines | 1- R. Winwood |
| 2- C. Baybutt | 2- P. Brown & J. Morron | 2- C. Baybutt |
| 3- R. Winwood | 3- L. Crisp & R. Wood | 3- C. Jones |
| RH Sidecars (Second) | 250cc | RH Sidecars (First) |
| 1- L. Crisp & R. Wood | 1- T. Owen | 1- P. Hill & B. Haines |
| 2- P. Brown & J. Morron | 2- T. Challinor | 2- P. Brown & J. Morron |
| 3- G. Matthews & A. Harley | 3- C. Jones | 3- L. Crisp & R. Wood |
| 355cc – 500cc | 255cc – 350cc | |
| 1- T. Owen | 1- C. Baybutt | |
| 2- E. Moseley | 2- E. Moseley | |
| 3- C. Baybutt | 3- G. Short |