What years did ponsonby baronet serve a conservative politician before they became a prime minister
Anthony Eden Robert Anthony Eden, 1st Earl of Avon, (12 June 1897 – 14 January 1977) was a British Conservative politician who served three periods as Foreign Secretary and then a relatively brief term as Prime Minister of the United Kingdom from 1955 to 1957.
Sir Charles Trevelyan, 3rd Baronet Sir Charles Philips Trevelyan, 3rd Baronet, {'1': ", '2': ", '3': ", '4': "} (28 October 1870 – 24 January 1958) was a British Liberal Party, and later Labour Party, politician and landowner. He served as President of the Board of Education in 1924 and between 1929 and 1931 in the first two Labour administrations of Ramsay MacDonald.