Zodiac Cipher – Toppled UK Government – Harold MacMillan Cabinet Ten Downing Street – 1957-1963

Background Info:
It is publicly known that PM Harold MacMillan authorised the bugging with, listening devices, of the Ten Downing Street Cabinet Room. Harold Wilson, during the mid-1970s, publicly asserted that a foreign power was attempting to overthrow the Labour Government of which he was Prime Minister. The listening devices in the Cabinet Room were requested to be removed during the late 1970s by Wilson’s successor as PM. It is not known whether these orders of Prime Minister James Callaghan were ever carried out.

Zodiac Cipher – Toppled UK Government – Harold MacMillan Cabinet Ten Downing Street – 1957-1963