Sir Michael Bowen Hanley KCB (24 February 1918 – 1 January 2001) was Director General (DG) of MI5, the United Kingdom's internal security service, from 1972 to 1978.

Educated at Sedbergh School and Queen's College, Oxford where he read history, Hanley served during the Second World War, being commissioned into the Royal Artillery of the British Army on 28 December 1940.

[1] He was subsequently served as an assistant military attaché to the Joint Allied Intelligence Centre in Budapest from 1946 to 1948.

[4] As Director General, Hanley had a difficult relationship with the Prime Minister, Harold Wilson.

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