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Mr. Deakins
asked the Secretary of State for Defence what are the horrific circumstances mentioned in his supplementary answer on 11 March, as leading to a decision by the United Kingdom to use its strategic nuclear deterrent.
Mr. Pym
I was referring to the arrangements set out in paragraph 9 of the joint United Kingdom/United States statement on nuclear defence systems of 21 December 1962 (published in Cmnd. 1915).