 In 1951, Plaid Cymru announced that the party would not oppose him at the General Election due to his support for the campaign.Eventually, he presented the final petition to Parliament, bearing more than 250,000 signatures, in May 1956.He was a member of the House of Commons Chairmen's Panel in 1963–64, and served in government as Minister of State at the Welsh Office from 1964–66, Minister of State at the Department for Education and Science from 1966–67, Minister of State for Foreign and Commonwealth Affairs 1967–69, and Minister of State for Trade 1969–70.