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
Labour Party (UK) widen the voting franchise to elect the leader and their deputy. By 1982, the National Executive Committee had concluded that the entryist Militant tendency group were in contravention of the party's constitution. The "Militant" newspaper's five member editorial board were expelled on 22 February 1983. The Labour Party was defeated heavily in the 1983 general election, winning only 27.6% of the vote, its lowest share since 1918, and receiving only half a million votes more than the SDP-Liberal Alliance who leader Michael Foot condemned for "siphoning" Labour support and enabling the Conservatives to greatly increase their majority of parliamentary seats.