High Quality Content by WIKIPEDIA articles! The 1975 British Grand Prix was a Formula One motor race held at Silverstone on July 19, 1975. It was the 30th British Grand Prix to be held since the race was first held in 1926 and the 17th time the race had been held at Silverstone. The race was held over 56 of the scheduled 67 laps of the four kilometre venue for a race distance of 264 kilometres.