Great Britain. Cabinet Office (Corporate Name)

Its webpages on UK Government wesite, viewed 18 April 2018 (Cabinet Office; a ministerial department; supports the Prime Minister and ensures the effective running of government; acts as the corporate headquarters for government, in partnership with HM Treasury, and takes the lead in certain critical policy areas)

National Archives' Discovery website, viewed 18 April 2018: under Records of the Cabinet Office (from its inception in 1916 the central purpose of the Cabinet Office was to act as the secretariat for the Cabinet and its committees, such as arranging meetings and drafting reports; the Office does not usually have an executive role in the carrying out of Cabinet decisions, which is the duty of the relevant government department, but it has had co-ordination functions at various times; became known as the Offices of the Cabinet in 1938)

Wikipedia, viewed 18 April 2018 (Cabinet Office; department of the Government of the United Kingdom responsible for supporting the Prime Minister and Cabinet of the United Kingdom; composed of various units that support Cabinet committees and which co-ordinate the delivery of government objectives via other departments; headquarters: 70 Whitehall, London, England; formed in December 1916 from the secretariat of the Committee of Imperial Defence)