Lieutenant-Colonel Sir Claude Edward Marjoribanks Dansey,[1] KCMG (10 September 1876 – 11 June 1947), also known as Colonel Z, Haywood, Uncle Claude, and codenamed Z, was the assistant chief of the Secret Intelligence Service known as ACSS, of the British intelligence agency commonly known as MI6, and a member of the London Controlling Section.

[3] At the age of 17 he became sexually involved with Robert Baldwin Ross, and Lord Alfred Douglas, narrowly avoiding exposure and imprisonment.

[9] On 1 March 1902 he was again seconded,[10] as a Staff Lieutenant for Intelligence in South Africa,[11] then on 24 June he was appointed aide-de-camp to the Brigadier-General commanding the Harrismith District, Charles James Blomfield.

[13] On 4 November 1904 he was seconded for "special extra-regimental employment"[14] as a Political Advisor in the British Somaliland Protectorate[citation needed] and on 24 October 1906 he resigned his commission.

[citation needed] Dansey married Mrs Pauline Monroe Ulman (maiden surname Cory) in 1915 and they were later divorced.