What does mi6 stand for?
‘MI6’ has become an almost interchangeable title for SIS, at least in the minds of those outside the Service. The origins of the use of this other title are to be found in the late 1930s when it was adopted as a flag of convenience for SIS. It was used extensively during the Second World War, especially if an organisational link needed to be made with MI5 (the Security Service). Although ‘MI6’ fell into official disuse years ago, many writers and journalists continue to use it to describe SIS.
