MI6 (Secret Intelligence Service)

The Secret Intelligence Service (SIS), commonly known as MI6, is the foreign intelligence service of the United Kingdom. MI6 was a co-architect of the 1953 Iranian coup d'état, planning Operation Boot alongside the CIA's Operation Ajax to overthrow Prime Minister Mohammad Mossadegh. British involvement was primarily motivated by the nationalisation of the Anglo-Iranian Oil Company in 1951, which threatened substantial British economic and strategic interests. The British government's role in the coup was formally acknowledged in 2013.