sentences:  Pryce's career was cut short at the 1977 South African Grand Prix after he collided with volunteer marshal, Jansen Van Vuuren, killing both instantly.Freddie Williams was world speedway champion in 1950 and 1953, and the British Grand Prix – the United Kingdom's round of the world championship – is held each year at the Millennium Stadium in Cardiff.For many years Newport Wasps ran a team in the British speedway leagues as did Carmarthen.