The British Grand Prix is a Grand Prix motor racing event organised in the United Kingdom by Motorsport UK. First held by the Royal Automobile Club (RAC) in 1926, the British Grand Prix has been held annually since 1948 and has been a round of the FIA Formula One World Championship every year since 1950. In 1952, following the transfer of the lease of the Silverstone Circuit to the British Racing Drivers' Club, the RAC delegated the organisation of races held at Silverstone to the BRDC, and those held at Aintree to the British Automobile Racing Club. This arrangement lasted until the RAC created the Motor Sports Association in the late 1970s and it reclaimed organising control of the event. The RAC MSA was renamed Motorsport UK in 2019 when it formally split from the RAC.