Complex sentence: Davies was the Freedom Party's sole candidate in the 2005 general election contesting South Staffordshire, which, owing to the death of a candidate, was postponed from May 5th to June 23rd.
Split into simpler sentences: Davies was the Freedom Party's sole candidate in the 2005 general election contesting South Staffordshire. The death of a candidate led to this election there being postponed from May 5th to June 23rd.