Complex sentence: Candidates were elected unopposed at most of the elections throughout its existence as a constituency; the only contested elections were in 1837,1868 and 1880, on each of which occasions two Conservative candidates defeated a single Whig or Liberal.
Split into simpler sentences: Candidates were elected unopposed at most of the elections throughout its existence; contested elections took place in 1837,1868 and 1880. In these contests two Conservative candidates defeated a single Whig or Liberal.