Amember of the Senedd (MS; plural: MSs; Welsh: aelodau o'r Senedd; AS, plural:ASau)[a] is a representative elected to the Senedd (Welsh Parliament; Welsh: Senedd Cymru). There are sixty members, with forty members chosen to represent individual Senedd constituencies, and twenty to represent the five electoral regions of the Senedd in Wales.
Each person in Wales is represented by five MSs: one for their local constituency (encompassing their local area where they reside), and another four covering their electoral region (a large grouping of constituencies). Wales's five electoral regions are Mid and West Wales, North Wales, South Wales Central, South Wales East and South Wales West.[1]
Since 2011, members are elected for a five-year term of office under an additional member system, in which 40 MSs represent smaller geographical divisions known as "constituencies" and are elected by first-past-the-post voting, and 20 MSs represent five "electoral regions" using the D'Hondt methodofproportional representation. Typically, the largest party holding the largest number of MSs in the Senedd forms the Welsh Government, and in the event of not securing a majority of MSs, the largest party has first rights to begin coalition talks with other smaller parties. Prior to 2011, they held four-year terms, with some MSs calling for a return of four-year terms from the current five.[4] From the next Senedd election, due in 2026, the size of the Senedd will increase to 96.[5][6]
Forty are elected as constituency MSs and twenty are elected as additional members, four from each of five regional groups of constituencies. This additional member system produces a form of proportional representation for each region.
All MSs positions become simultaneously vacant for elections held on a five-year cycle. If a vacancy arises at another time, due to deathorresignation, it may be filled in one of two ways, depending on whether the vacancy is for a first-past-the-postconstituency MS or for an additional-member MS.
A constituency vacancy may be filled by a by-election. An additional member vacancy may be filled by the next available candidate on the relevant party list.
^Alternatively referred to in English-language media, using the official English name, the Welsh Parliament, as a Member of the Welsh Parliament or a Welsh Parliament Member, however, a member is officially known as a Member of the Senedd (MS), or in Welsh: Aelodau o'r Senedd (AS).
