John Harrison will race a Chiron for the first time in the final rounds of the Dunlop Supersports Championship at Silverstone on 18 September.Harrison, a long-time Supersports racer, will take over the car normally raced by Doug Hart who is away in the USA on business. Harrison will join Chiron regulars Stephen Shanly and Peter Hobday in the three-car team."John is a very experienced driver and a dedicated supporter of Supersports," says team boss Henry Nickless. "He is always there to provide any help or advice we require. We trust he will enjoy the drive!"Harrison started racing in 1970 and won the Formula 1300 title three times running in the early 1990s. More recently he has twice finished fourth in the Supersports championship in his Nemesis. This is his 34th consecutive season of racing!