13 May 1973 at Berwick St. John
| 500cc | RH Sidecars | 350cc |
| 1- John Britcher | 1- Dennis Teasdale & John Arkle | 1- John Bowley |
| 2- Richard Moore | 2- Roger Measor & Trevor Bullock | 2- John Britcher |
| 3- Brian Brown | 3- Lloyd Crisp & Barry Wood | 3- Steve Hartley |
| 250cc | ||
| 1- Dave Baybutt | ||
| 2- Tig Perry | ||
| 3- Dave Brown |