Complex sentence: At the time of the 1945 general election Creasey was Chairman of the local Liberal Association in Bournemouth where his publicity and written skills were instrumental in helping the Liberals to an untypical second place.
Split into simpler sentences: At the time of the 1945 general election Creasey was Chairman of the local Liberal Association there. His publicity skills were instrumental in helping the Liberals to an untypical second place.