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 . It and the Italian Grand Prix are the only two Formula One World Championship Grands 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. It was designated the European Grand Prix five times between 1950 and 1977, when this title was an honorary designation given each year to one Grand Prix race in Europe. All British Grands Prix dating back to 1926 have been held in England, where the British motor racing industry is primarily located.