In 1973, with DeGaulle gone, Conservative Prime Minister Heath negotiated terms for admission and Britain finally joined the Community. In opposition the Labour Party was deeply divided, though its Leader, Harold Wilson, remained in favour. In the 1974 General Election the Labour Party manifesto included a pledge to renegotiate terms for Britain's membership and then hold a referendum on whether to stay in the EC on the new terms. This was a constitutional procedure without precedent in British history. In the subsequent referendum campaign, rather than the normal British tradition of "collective responsibility", under which the government takes a policy position which all cabinet members are required to support publicly, members of the Government (and the Conservative opposition) were free to present their views on either side of the question. A referendum was duly held on 5 June 1975, and the proposition to continue membership was passed with a substantial majority.