Anthony Eden

Anthony Eden was a British Prime Minister.

The Twelfth Doctor mentioned Eden as a possible candidate when asking the Landlord who the Prime Minister was in 2017. (TV: Knock Knock)

Behind the scenes
"Eden" is most likely a reference to Robert Anthony Eden, who was British Prime Minister from 1955 to 1957.
 * Anthony Calf played Eden in the play Never So Good, alongside Ian McNeice's Winston Churchill, and in the BBC series Upstairs, Downstairs.
 * Eden was also played by Michael Gough in the television play Suez 1956.