 Active in Conservative politics, he became a member of the London County Council in October 1956 when he was selected to fill an aldermanic vacancy, having failed to be elected to the council in the previous year.His term of office expired in 1958, but he returned to the council in 1961, and remained a member until its abolition in 1965.In the 1959 landslide election, Carr was elected member of parliament (MP) for the seat of Barons Court in west London overturning a small Labour Party majority of 125 to win the seat by 913 votes.