Since the creation of the assembly the constituency has returned a Labour AM, with varying majorities, from 7.7% to 26.8%. The current incumbent Jeremy Miles is one of the first openly gay elected Assembly Members.Plaid Cymru are Labour's main opposition in the seat.
In the election in 2016 the constituency got the highest vote share from an Independent in Steve Hunt with 8.1% of the vote. Hunt was the only independent to save his deposit.
In general elections for the National Assembly for Wales, each voter has two votes. The first vote may be used to vote for a candidate to become the Assembly Member for the voter's constituency, elected by the first past the post system. The second vote may be used to vote for a regional closed party list of candidates. Additional member seats are allocated from the lists by the d'Hondt method, with constituency results being taken into account in the allocation.