22 June 1980 at Ruskington Lane, Sleaford
| 500cc | 350cc | 250cc |
| 1- Jerewmy Doncaster & Terry Birkumshaw | 1- John Underwood & Alan Gardiner | 1- Richard Wakeling & Jeremy Doncaster |
| 2-Simon Wigg & Julian Wigg | 2- Richard Wakeling & Terry Birkumshaw | 2- Bill Pye & Dave Baybutt |
| 3- Chris Baybutt & Mick Garrard | 3- Lee Bird & Les Card | 3- Martin Hagon & Marle Lweis |
| RH Sidecars | 500cc Sidecars | |
| 1- Mick Dawkins & John Hall / | 1= John Elliott & Paul Mossman / | |
| Colin Banks & John Hall | Geoff Eyears & Steve Eyears | |
| 2= Ken Jones & Steve Wheeler / | 1= Ken Smith & Dave Brown / | |
| Rob Stoneman & Rowland Broomfield | Ted Scott & John Atkinson | |
| 2= Steve Smith & Trevor Pye / | 3- Steve Smith & Trevor Pye / | |
| Edddie Tucker & Dave Ward | Rob Stoneman & Rowland Broomfield |
27 April 1980 at Ruskington Lane
| 500cc | RH Sidecars | 250cc |
| 1- Chris Baybutt | 1- John Halsey & Dave Caveill | 1- Dave Baybutt |
| 2- Graham Hurry | 2- Paul Pinfold & Mark Nelson | 2- Mick Nicholson |
| 3- Richard Moore | 3- Ken Smith & Dave Brown | 3- Bill Pye |