A member of this party won an election by campaign
A member of this party won an election by campaigning under the slogan "Let us Face the Future." A document that Tony Benn published for this party was derided as "The longest suicide note in history."  While the country was crippled by strikes, a leader from this party was panned for saying "Crisis? What Crisis?" during a press conference and was photographed swimming off of Guadeloupe. A member of this party, Aneurin Bevan, established the National Health Service. Prime Ministers from this party include James Callaghan and Clement Attlee. For 10 points, name this center-left British party that is currently the opposition to the Conservatives.