The tribunal’s ruling was in response to a complaint brought by civil liberties campaign group Liberty, among others, in the wake of claims by former NSA contractor Edward Snowden about mass U.S. surveillance programs such as Prism.
Snowden’s revelations led to questions over GCHQ’s sharing of surveillance data with the United States.
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The Investigatory Powers Tribunal is an independent body set up to investigate complaints about the alleged conduct of public bodies with regard to members of the public.
It deals with complaints about the use of intrusive powers such as wiretapping by intelligence services, law enforcement agencies and public authorities.
