Sidney Ronald Clarke (born 26 March 1914 in Oxford, England[1] - 12 June 1981[2] ) was a former international speedway who qualified for the Speedway World Championship finals twice.
[3][4] Clarke started his career in British leagues with Lea Bridge during the 1938 Speedway National League Division Two season.
[5] The following season he joined the Crystal Palace Glaziers but the team withdrew from the league mid-season, shortly before the outbreak of World War II.
[6] In 1944, he was deemed to be the British champion after winning an event advertised as the British Championship but many riders were not involved because of the war.
[8] Clarke qualified for two World finals in succession in 1949 and 1950 and at retirement he had earned 9 international caps for the England national speedway team.