100cc schoolboy motocross 1985 Royston 

Inter open, race 1 and 2 from Royston 1985.... thats what the video says, perhaps a norfolk and suffolk scramble club race meeting, or Stevenage schoolboy scramble club,, judging by the riders up front.
Featured rider, number 9 Ryan Griffiths, not a regular rider, with whatever club or track this is.. gets the lead in the first race from what looks like, number 62 Jolian Dutton.., and possibly Steven Harrison in blue kit, who comes on strong towards the end of race 1.
filmed by Ruth Ingram.