HC Deb 04 November 1997 vol 300 c119W
Mr. Baker

To ask the Secretary of State for the Home Department under what circumstances MI5 operatives are allowed to undertake intrusive surveillance without first obtaining a warrant.[13781]

Mr. Straw

[holding answer 3 November 1997]: There are no circumstances under which Security Service officers would be allowed to carry out intrusive surveillance involving entry on to or interference with property which would otherwise be unlawful, except under authority of a warrant issued by the Secretary of State under the Intelligence Services Act 1994.