23 September 1973 at Henlade
| Unlimited (SW Centre Championship) | RH Sidecars (SW Centre Championship) | Unlimited |
| 1- Lew Coffin | 1- M. Cox & T. Beale | 1- Lew Coffin |
| 2- Adrian Kessell | 2- S. de Gregorio & G. Schofield | 2- Adrian Kessell |
| 3- D. Purchase | 3- D. John & M. John | 3- D. Purchase |
| Experts | RH Sidecars Open | Juniors |
| 1- Lew Coffin | 1- S. de Gregorio & G. Schofield | 1- D. Purchase |
| 2- Adrian Kessell | 2- D. John & M. John | 2- C. Lapman |
| 3- R. Northley | 3- G. Spurway & B. Salter | 3- J. Parker |
| RH Sidecar Experts | RH Sidecar Juniors | |
| 1- D. John & M. John | 1- M. Cox & T. Beale | |
| 2- S. de Gregorio & G. Schofield | 2- D. Parsons & B. Parsons | |
| 3- G. Spurway & B. Salter | 3- E. Condon & ANOther |