First Lord of the Treasury
Accordingly, the First Lord of the Treasury is the title most associated with the Prime Ministership. Seven Prime Ministers saw fit to occupy the post of First Lord of the Treasury only, and held no other subsidiary office. Those Prime Ministers were Lord Rockingham (1782), Lord Portland (1807–1809), David Lloyd George (1916–1922), Sir Anthony Eden (1955–57), Harold Macmillan (1957–1963), Sir Alec Douglas-Home (1963–1964), and Harold Wilson (1964–1968, at which point he also became Minister for the Civil Service).