Complex sentence: The series commences in the wake of a general election in which the incumbents have been defeated by the opposition to which Jim Hacker MP belongs--the party affiliation is not stated, although his party emblem is clearly not Conservative nor Labour.
Split into simpler sentences: The series commences in the wake of a general election in which the incumbents have been defeated by the opposition to which Jim Hacker MP belongs. His party affiliation is not stated, although his party emblem is clearly not Conservative nor Labour.