 During the decade that Mawby supplied information he handed over lists of parliamentary committees, and details about his fellow politicians, including a supposedly confidential parliamentary investigation into a Conservative peer.Meetings sometimes took place three or four times in a month, although this greatly decreased by the end of the 1960s, and ended completely in November 1971.There is no indication in MI5's authorised history that they knew of Mawby's spying activities, and he is the only Conservative MP known to have spied for a Communist government.