Changes to regulations for sports car racing in the late 1970s paved the way for a golden era of endurance racing in the 80s, with the likes of Porsche, Lancia, Jaguar and Mercedes all vying for the World Sportscar Championship. The Silverstone 6-Hour and 1000km races became a cornerstone of this championship and the event was often used by the teams as a warm-up to the all important Le Mans 24-Hour race, which followed it on the calendar. This book charts the progress of the races, year-by-year from 1976, through the era of the Group C cars, up to the end of the eighties, with previously unpublished accounts and photographs of each event