26 August 1973 at Spilsby
| Overall Solo | RH Sidecars | 500cc |
| South Eastern | Midlands | East Midlands |
| R. Oakley, C. Packman, R. Duke, J. | S. Smith & R. French | B. Maxted, R. Moore & T. Pepper |
| J. Britcher R. Luckhurst & S. Luck | F. Verlic & A. Prestcott | |
| L. Crisp & W. Wood | ||
| 350cc | 250cc | |
| South Eastern | Western | |
| J. Britcher, R. Duke & S. Luck | A. Perry, M. Burton & N. Aldridge |