The original box carries not a single mention of the subject, let alone how this English club scene picture ended up in a Dutch produced (Jumbo) jigsaw puzzle.
Mini racing grid at Brands Hatch, DJ Bond Racing Mini on pole probably Terry Harmer? 1968-ish? Also been suggested "Jonathan Buncombe is standing next to car 15. He was racing a Mini the following year so it probably would not be '69."