Richard Austen Butler, Baron Butler of Saffron Walden,, also known as R. A. Butler and familiarly known from his initials as Rab, was a prominent British Conservative Party politician; he was effectively Deputy Prime Minister to Anthony Eden and Harold Macmillan, although he only held the official title for a brief period in 1962–63. He was one of his party's leaders in promoting the post-war consensus through which the major parties largely agreed on the main points of domestic policy until the 1970s; it is sometimes known as "Butskellism" from a fusion of his name with that of his Labour counterpart, Hugh Gaitskell.

Hugh Todd Naylor Gaitskell was a British politician who served as Leader of the Labour Party and Leader of the Opposition from 1955 until his death in 1963. An economics lecturer and wartime civil servant, he was elected to Parliament in 1945 and held office in Clement Attlee's governments, notably as Minister of Fuel and Power following the bitter winter of 1946–47, and eventually joining the Cabinet as Chancellor of the Exchequer. Facing the need to increase military spending in 1951, he imposed National Health Service charges on dentures and spectacles, prompting the leading left-winger Aneurin Bevan to resign from the Cabinet.