Liberty Human Rights and their Irish equivalents, the British Irish Rights Watch and the Irish Council for Civil Liberties have actually won a case before the European Court of Human Rights against the United Kingdom Government, regarding domestic and international telephone interceptions. in the 1990s.
See CASE OF LIBERTY AND OTHERS v. THE UNITED KINGDOM (Application no. 58243/00), Strasbourg, 1 July 2008
(Via Spy Blog – SpyBlog.org.uk.)