The constituency as such did not exist for the first Assembly in 1875.

The constituency has existed since the February 1974 general election.

A provincial constituency of the same name existed from 1912 to 1952.

The constituency has existed in a number of different forms.

The constituency had previously existed for three elections from 1951 till 1962.

A constituency of this name has existed continuously since 1708.

A previous constituency of the same name existed from 1885 to 1918.

The constituency has existed since the first Parliament in 1976.

An earlier two-member constituency of the same name existed from 1832 to 1885.

It was only in 1880, at the end of the period when this constituency existed, that the Liberals first won a seat from the area.