Herbert Stanley Morrison, Baron Morrison of Lambeth, CH, PC was a British Labour politician who held a variety of senior positions in the Cabinet. During the inter-war period, he was Minister of Transport during the 1929–1931 Labour Government, then, after losing his seat in Parliament in 1931, became Leader of the London County Council in the 1930s. Returning to the Commons in 1935, he was defeated by Clement Attlee in the Labour leadership election that year, but later acted as Home Secretary in the wartime coalition.
Morrison organised Labour's victorious 1945 election campaign, and was appointed Leader of the House of Commons and acted as Attlee's deputy in Attlee's governments of 1945–51. Attlee, Morrison, Ernest Bevin, Stafford Cripps and Hugh Dalton formed the "Big Five" who dominated those governments. Morrison oversaw Labour's nationalisation programme, although he opposed Aneurin Bevan's proposals for a nationalised hospital service as part of the setting up of the National Health Service. Morrison developed his social views from his work in local politics and always emphasised the importance of public works to deal with unemployment.