HC Deb 19 July 1982 vol 28 c46W
Mr. Cook

asked the Secretary of State for Foreign and Commonwealth Affairs in what area of the South Atlantic the United Kingdom is prevented from deploying nuclear weapons by its adherence to the treaty of Tlatelolco; and if he is aware of any infraction of the treaty by a signatory country.

Mr. Hurd

By ratification of Additional Protocol I of the Treaty of Tlatelolco, the United Kingdom has undertaken not to deploy nuclear weapons in territories, including their surrounding territorial waters and airspace, for which it is de jure or de facto internationaly responsible, and which lie within the geographical zone established in the treaty. This covers the Falkland Islands and the Falkland Islands dependencies. The treaty is not in force in the south Atlantic outside these territorial limits because there are countries in the area to which the treaty applies which have not ratified it. I am aware of no infractions of the treaty.