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.
Barbara Castle
Labour returned to government under Harold Wilson in October 1964 following a general election, defeating Alec Douglas-Home's Conservative government by winning a slim majority of four seats, thus ending 13 years of successive Conservative governments. Wilson had selected his core Cabinet four months prior to the election; Castle knew Wilson intended to place her within his Cabinet, which would make her the fourth woman in British history ever to hold position in a Cabinet, after Margaret Bondfield, Ellen Wilkinson and Florence Horsbrugh.