Council of Civil Service Unions v Minister for the Civil Service (GCHQ) is a British intelligence agency that provides signals intelligence to the British government and armed forces. Prior to 1983 its existence was not acknowledged, despite the fact that it openly recruited graduates. Following a spy scandal in 1983, the organisation became known to the public, and the government of Margaret Thatcher decided a year later that employees would not be allowed to join a trade union for national security reasons. The Minister for the Civil Service is a position held "ex officio" by the Prime Minister. This was done through an Order in Council, an exercise of the Royal
Law for the Restoration of the Professional Civil Service jobs. Moreover, civil servants should be let go if they had started their jobs after 1918 and were now unable to demonstrate that they had acquired all the training necessary for their careers. These people were called "membership book officials (Parteibuch-Beamte)" in the language of National Socialist propaganda. According to § 3 (1) of the "First Ordinace for the accomplishment of the Law for the Restoration of the Professional Civil Service, officials without "Aryan" heritage were those who had even just one Jewish grandparent (in contrast to the way the Nuremberg Laws of 1935 regarded such people, as "quarter-Jews ("Vierteljuden")).