Harold Wilson conspiracy theories
Since the mid-1970s, a variety of conspiracy theories have emerged regarding British Labour Prime Minister Harold Wilson, who served as the Prime Minister of the United Kingdom from 1964 to 1970 and 1974 to 1976, winning four general elections. These range from Wilson having been a Soviet agent (a claim which MI5 investigated and found to be false), to Wilson being the victim of treasonous plots by conservative-leaning elements in MI5, claims which Wilson himself made.
Manny Shinwell
Shinwell did not resume ministerial office when Labour returned to power in October 1964, but instead the new Prime Minister Harold Wilson appointed him Chairman of the Parliamentary Labour Party, and during the 1964-6 Parliament he worked hard to drum up backbench support for the government, which had a very narrow majority. He was appointed to the Order of the Companions of Honour in the 1965 Birthday Honours. He was vehemently opposed to Wilson's attempt to enter the EEC in 1966, and resigned as Chairman of the Labour Party in 1967.