Profumo was then the youngest MP, and by the time of his death he had become the last surviving former member of the 1940 House of Commons. At the 1945 election Profumo was defeated at Kettering by a Labour candidate, Dick Mitchison. Later in 1945 he was chief of staff to the British Mission to Japan. In 1950 he left the Army and at the general election in February 1950 he was elected for Stratford-on-Avon in Warwickshire, a safe Conservative seat.