The way the Welsh Assembly is elected is a little more complicated than in the rest of the UK. The Assembly has 60 elected Assembly Members (AMs). Assembly elections take place every four years and each registered voter has two votes. The first vote is for a local constituency Member.
A Member is elected for each of the 40 constituencies in Wales by FPTP, with the remaining 20 AMs elected by the Regional Top-Up system in which voters have an extra vote for a specific region that they reside in. The regions are South Wales East, South Wales Central, South Wales West, Mid and West Wales and North Wales. Each region elects four AMs.
These additional member seats are allocated from the lists by what is called the d’Hondt method, with constituency results being taken into account in the allocation. The overall result is relatively proportional.