 In 1923 and 1924, he held the seat as a Unionist (majorities 3,013 and 6,662) and outspoken backbencher and from 1925 as a Conservative Unionist.At the 1929 election, his majority was 4,326; in 1931, 5,239; and in 1935 it reduced to 2,090 following disparaging remarks made about his opponent Mr Chapel, a Welsh Methodist minister.Refusing lesser honours, Colfox accepted a baronetcy in 1939 from his cousin Neville Chamberlain, speaking in the debate following the latter's resignation in support of the outgoing Prime Minister.