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.
John Rigby (politician) Sir John Rigby, PC (8 January 1834 – 26 July 1903), was a British judge and Liberal politician who sat in the House of Commons between 1885 and 1894.