Conservative Party (UK) in the Falklands War in June that year, along with the recovering British economy, saw the Conservatives returning quickly to the top of the opinion polls and winning the 1983 general election with a landslide majority, due to a split opposition vote. Thatcher now faced, arguably, her most serious rival yet after the 1983 general election, when Michael Foot resigned as Leader of the Labour Party and was succeeded by Neil Kinnock. With a new leader at the helm, Labour were clearly determined to defeat the Conservatives at the next election and for virtually the entirety of Thatcher's second ministry
History of the Labour Party (UK) which the yes and no campaigns were both cross-party – the referendum voted in 1975 to continue Britain's membership by two thirds to one third. This issue later caused catastrophic splits in the Labour Party in the 1980s, leading to the formation of the Social Democratic Party. In the initial legislation during the Heath Government, the Bill affirming Britain's entry was only passed because of a rebellion of 72 Labour MPs led by Roy Jenkins and including future leader John Smith, who voted against the Labour whip and along with Liberal MPs more than countered the effects of Conservative rebels