HC Deb 20 October 1982 vol 29 c166W
Mr. Dalyell

asked the Secretary of State for Defence what warning he was given of Argentine troop and ship movements by the American National Security Agency, under the agreement reached with the British Government in return for the use of Ascension Island.

Mr. Blaker

The agreement for the use of the long range missile testing sites at Ascension Island does not involve the provision of data from the National Security Agency. It is not in any case the practice to reveal sources of intelligence.