As well as being an author, Creasey was a committed Liberal party member though he later became an independent. He said that he had been organising Liberal street-corner meetings from the age of 12. At the time of the 1945 general election Creasey was Chairman of the local Liberal Association in Bournemouth where his publicity and writing skills were instrumental in helping the Liberals to an atypical second place. He was adopted as prospective parliamentary candidate for Bournemouth West in 1946 and appeared on the platform at the 1947 Liberal Assembly, which was held in Bournemouth.