19 April 1981 at Godmanchester
| 500cc (2) | RH Sidecars Unlimited (2) | 500cc (1) |
| 1- Steve Schofield | Not Known | 1- Jeremy Doncaster |
| 2- John Underwood | 2- Steve Schofield | |
| 3- Clint Ward | 3- Clint Ward | |
| 350cc | 500cc Sidecars (2) | 250cc |
| 1- Steve Schofield | 1- T. Higgs & B. Knights | 1- Dave Brown |
| 2- John Underwood | 2- G. Eyears & S. Eyears | 2- Mike Nicholson |
| 3- Rob Price | 3- D. Callison & T. Brown | 3- Chris Baum |
| RH Sidecars Unlimited (1) | 500cc Sidecars (1) | |
| 1- P. Smith & T. McRitchie | 1- T. Higgs & B. Knights | |
| 2- D. Shaw & B. Coppock | 2- P. Hastings & A. Hastings | |
| 3- S. Jukes & ANOther | 2- G. Eyears & S. Eyears |