“In a decision of the utmost gravity, Labour voted to give up Britain's independent nuclear deterrent unilaterally. Labour's defence policy—though "defence" is scarcely the word—is an absolute break with the defence policy of every British Government since the Second World War. Let there be no doubt about the gravity of that decision. You cannot be a loyal member of NATO while disavowing its fundamental strategy. A Labour Britain would be a neutralist Britain. It would be the greatest gain for the Soviet Union in forty years. And they would have got it without firing a shot.”
Conservative Party Conference (10 October 1986) http://www.margaretthatcher.org/speeches/displaydocument.asp?docid=106498
Second term as Prime Minister
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Margaret Thatcher 348
British stateswoman and politician 1925–2013Related quotes

Speech to Conservative Party Conference (12 October 1984) http://www.margaretthatcher.org/document/105763
Second term as Prime Minister

Speech to Conservative Party Conference (11 October 1985) http://www.margaretthatcher.org/document/106145
Second term as Prime Minister

Quoted in CornwallLive. Cornwall and Devon European MP Molly Scott Cato arrested after breaking into US air base in Belgium https://www.cornwalllive.com/news/cornwall-news/cornwall-devon-european-mp-molly-2564421 (20 February 2019)
2019

The Guardian (14 August 1981).
1980s

Speech in Woodford (12 October 1951), quoted in The Times (13 October 1951), p. 9
Post-war years (1945–1955)

Speech to the Labour Party conference on Britain's membership of the EEC (26 April 1975), quoted in The Times (28 April 1975), p. 4
1970s

Speech in Grantham (29 November 1963), quoted in The Times (30 November 1963), p. 8
Prime Minister

Speech in Falkirk (26 March 1966) during the general election campaign, quoted in Andrew Roth, Enoch Powell: Tory Tribune (1970), p. 337
1960s