12 September 1979 at at Ruskington Lane
| 500cc | 350cc | 250cc |
| 1- Chris Pidcock | 1- Clayton Williams | 1- Mark Wadsworth |
| 2= Clayton Williams | 2= Mark Wadsworth | 2- Mark Nicholson |
| 2= R. Bartle | 2= Chris Pidcock | 3- D. Rendall |
| 4- Dave Baybutt | 4- Rob Smith | 4= Bill Pye |
| 5- T. Rawlinson | 5- M. Pitcher | 4= Dave Baybutt |
| 6= P. Clements & M. Walsh | 6- Bill Pye | 6- Tig Perry |
| RH Sidecars | 500cc Sidecars | |
| 1- Eddie Tucker & Dave Ward | 1- Steve Smith & Trevor Pye | |
| 2- Pete Brown & John Morron | 2- T. Higgs & B. Knight | |
| 2= Ken Smith & Dave Brown | 3- T. Jones & P. Gollins | |
| 4- F. Pearson & J. Kershaw | 4- J. Locke & S. Elmer | |
| 5= T. Holmshaw & D. Smith | 5- Ken Smith & Dave Brown | |
| 5= M. Dawkins & J. Hall |
24 June 1979 at Ruskington Lane, Sleaford
| 500cc | 350cc | 250cc |
| 1- Graham Hurry & Brian Webb | 1- Rob Smith & Chris Pidcock | 1- Richard Moore & Dave Baybutt |
| 2= Dave Simpson & Richard Beaumont | 2- Alan Gardiner & John Underwood | 2- Bill Pye & Frank Smith |
| 2= Simon Wigg & Julian Wigg | 3- Will Pye & Frank Smith | 3- Paul Cotton & Jeremy Doncaster |
| RH Sidecars | 500cc Sidecars | |
| 1- Colin Banks & Wally Brammer / | 1- Dick Evans & Kevin Day | |
| Mick Dawkins & John Hall | John Pepper & Tony Angelico | |
| 2- Roger Measor & Jeff Measor / | 1= Ken Smith & Dave Brown | |
| Pete Robson & Dave Hope | Bob Hartley & D.Markham | |
| 3- Gerry Wheeler & Stuart Rattenbury / | 3- Chris Barton & ANOther | |
| Rob Stoneman & Rowland Broomfield | Dick Barton & Doug Tarrant |