Completed the following sentence: The British race is the oldest in the Formula One World Championship calendar as the
1950 race at Silverstone was round one of the first championship season in.<unk> It and the Italian Grand Prix are the only two Formula One World Championship Grand Prix that have been staged during every season that the championship has been held. The British Grand Prix was a round of the World Manufacturers' Championship in both 1926 and 1927, but was never held during the existence of the European Championship. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ All British Grand Prix dating back to 1926 have been held in England, where the British motor racing industry is primarily located.