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
Public service of the Republic of Ireland of the Government and the Civil Service of the State. Whilst these two components are largely theoretical they do have some fundamental operational differences. The Civil Service of the Government advises and carries out the work of the Government, through the various Departments of State, of which there are fifteen; one for each Minister of the Government. Each department is led by a senior civil servant known as the Secretary General (often referred to as "departmental head" in the media), a title equivalent to that of Permanent Secretary in the British Civil Service. The most senior civil servant and head