From 1999 Cardiff Central was a safe seat for the Liberal Democrats. However the seat was lost to Labour in 2011 with a huge 14.7% swing. In 2016 this was the Liberal Democrats target seat with their candidate Eluned Parrott a current regional AM for South Wales Central. The result actually saw a very slight increase in Labour's majority in a very disappointing night for the Liberal Democrats. The seat remains one of the most marginal in the assembly.
In general elections for the Senedd, each voter has two votes. The first vote may be used to vote for a candidate to become the Member of the Senedd 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.