Senedd

Wikipedia contributors · CC BY-SA · EN · 04/10/2026

The Senedd (;), officially known as the Welsh Parliament in English and Senedd Cymru in Welsh, is the devolved, unicameral legislature of Wales. A democratically elected body, its role is to scrutinise the Welsh Government and legislate on devolved matters that are not reserved to the Parliament of the United Kingdom. It is a bilingual institution, with both Welsh and English being the official languages of its business. From its creation in May 1999 until May 2020, the Senedd was officially known as the National Assembly for Wales (Cynulliad Cenedlaethol Cymru) and was often simply called the Welsh Assembly.

The Senedd comprises 96 members who are known as members of the Senedd (Aelodau o'r Senedd), abbreviated as "MS" (AS). Between 2011 and 2026, members were elected for a five-year term of office under the additional-member system, in which 40 MSs represented smaller geographical divisions known as "constituencies" and were elected by first-past-the-post voting, and 20 MSs represented five "electoral regions" using the D'Hondt method of proportional representation. Since May 2026, elections use closed list proportional representation, and Senedd terms last for four years. Typically, the largest party in the Senedd forms the Welsh Government.

A National Assembly for Wales was created by the Government of Wales Act 1998, following the result of the 1997 referendum. The Assembly initially had no powers to make primary legislation. Limited law-making powers were gained through the Government of Wales Act 2006. Its primary law-making powers were enhanced following a Yes vote in the referendum on 3 March 2011, meaning that the UK Parliament or the Secretary of State for Wales were no longer consulted when passing acts of the National Assembly for Wales related to the 20 devolved areas. These powers were further extended by the Wales Act 2014 and Wales Act 2017, with the latter moving the Assembly to a reserved powers model of devolution like that of the Scottish Parliament. In May 2020, the Assembly was renamed to "Senedd Cymru" or "Welsh Parliament" when section 2 of the Senedd and Elections (Wales) Act 2020 came into force. The Senedd's powers in economic matters are significantly restricted by the UK Internal Market Act 2020, a primary purpose of which is to constrain the capacity of the devolved institutions to use their regulatory autonomy. Matters devolved to the Senedd include health, education, economic development, transport, the environment, agriculture, local government and some taxes.

History

Road to devolution

Political movements supporting Welsh self-rule began in the late nineteenth century alongside a rise in Welsh nationalism. The Sunday Closing (Wales) Act 1881 was the first piece of legislation to acknowledge Wales as a separate politico-legal nation from England since the Acts of Union 1535 and 1542. The late 19th century saw the formation of a number of national institutions; a national and annual cultural event, the National Eisteddfod of Wales in 1861, the Football Association of Wales in 1876, the Welsh Rugby Union in 1881 and the University of Wales in 1893.

In 1896, education in Wales began to become distinct with the formation of the Central Welsh Board which inspected grammar schools in Wales and The Welsh Intermediate Education Act 1889 was brought about to "make further provision for the intermediate and technical education of the inhabitants of Wales and the county of Monmouth", making the board responsible for inspection of secondary schools. In 1907, the Welsh department of the Board of Education was formed and in the same year, a Welsh Inspectorate was established for inspection of elementary schools in Wales.

The early 20th century also saw the continued formation of a number of Welsh national institutions; the National Library of Wales in 1911, the Welsh Guards in 1915 and the Welsh Board of Health in 1919. The Church in Wales came into existence in 1920 following the disestablishment of the Church of England via the Welsh Church Act 1914.

An appointed Council for Wales and Monmouthshire was established in 1949 to "ensure the government is adequately informed of the impact of government activities on the general life of the people of Wales". The council had 27 members nominated by local authorities in Wales, the University of Wales, National Eisteddfod Council and the Welsh Tourist Board. A post of Minister of Welsh Affairs was created in 1951 and the post of Secretary of State for Wales and the Welsh Office were established in 1964 leading to the abolition of the Council for Wales. The establishment of the Welsh Office effectively created the basis for the territorial governance of Wales. The Royal Commission on the Constitution (the Kilbrandon Commission) was set up in 1969 by Harold Wilson's Labour Government to investigate the possibility of devolution for Scotland and Wales. Its recommendations formed the basis of the 1974 White paper Democracy and Devolution: proposals for Scotland and Wales, which proposed the creation of a Welsh Assembly. However, Welsh voters overwhelmingly rejected the proposals in a referendum held in 1979.

Following the 1997 general election, the new Labour Government argued that an Assembly would be more democratically accountable than the Welsh Office. For eleven years prior to 1997 Wales had been represented in the Cabinet of the United Kingdom by a Secretary of State who did not represent a Welsh constituency at Westminster. A referendum was held in Wales on 18 September 1997 in which voters approved the creation of the National Assembly for Wales with a total of 559,419 votes, or 50.3% of the vote.

In the following year, the Government of Wales Act was passed by the United Kingdom parliament, establishing the Assembly. On 1 July 1999, the powers of the Secretary of State for Wales were transferred to the Assembly, and the Welsh Office ceased to exist.

In July 2002, the Welsh Government established an independent commission, with Lord Richard (former leader of the House of Lords) as chair, to review the powers and electoral arrangements of the National Assembly to ensure that it is able to operate in the best interests of the people of Wales. The Richard Commission reported in March 2004. It recommended that the National Assembly should have powers to legislate in certain areas, whilst others would remain the preserve of Westminster. It also recommended changing the electoral system to the single transferable vote (STV) which would produce greater proportionality.

In response, the British government, in its Better Governance for Wales White Paper, published on 15 June 2005, proposed a more permissive law-making system for the Welsh Assembly based on the use of Parliamentary Orders in Council.

Enhanced powers: The Government of Wales Act 2006

The Government of Wales Act 2006 received Royal assent on 25 July 2006. It conferred on the Assembly legislative powers similar to other devolved legislatures through the ability to pass Assembly Measures concerning matters that are devolved. Requests for further legislative powers made through legislative competence requests were subject to the veto of the Secretary of State for Wales, House of Commons or House of Lords.

The Act reformed the assembly to a parliamentary-type structure, establishing the Welsh Government as an entity separate from, but accountable to the National Assembly. It enables the Assembly to legislate within its devolved fields.

The Act also reforms the Assembly's electoral system. It prevents individuals from standing as candidates in both constituency and regional seats. It was supported in the Richard Commission.

The changes to the Assembly's powers were commenced on 4 May 2007, after the election.

Following a referendum on 3 March 2011, the Welsh Assembly gained direct law making powers, without the need to consult Westminster.

Reserved powers model: The Wales Act 2017

The Conservative-Liberal coalition government created the Commission on Devolution in Wales (also known as Silk Commission), composed of members nominated by the 4 parties represented in the Welsh Assembly and several leading legal and political experts, to "create a lasting devolution settlement for Wales". Following the first set of recommendations by the Commission, the UK government announced in November 2013 that some borrowing powers are to be devolved to the Assembly along with control of landfill tax and stamp duty. Additionally the Wales Act 2014 provides for a referendum to be held on the Assembly's ability to set a degree of income tax, though there is a proposal for the requirement for a referendum to be removed.

Both the UK and Welsh governments supported the Silk Commission (Part 2) proposal to move to a "reserved powers" model of devolution (similar to that of the Scottish Parliament and the Northern Ireland Assembly) where the UK government would have specific "reserved" powers and the Welsh Assembly would have control of all other matters. This replaced the previous model where certain powers were "conferred" and all others were assumed to be powers of the UK national government. Since the passing of the Wales Act 2017, the power model in Wales has been in line with that of Scotland, being a reserved matter model.

The Wales Act 2017, based on the second set of recommendations of the Silk Commission, proposed devolving further areas of government, including some relating to water, marine affairs (ports, harbours, conservation), energy (subsidies, petroleum extraction, construction of smaller energy-generating facilities, etc.), rail franchising and road travel.

Name change

In July 2016, Assembly members unanimously agreed that the name of the Assembly should reflect its constitutional status as a national parliament. The Assembly Commission ran a public consultation on the proposal, which showed that 61% of respondents agreed or strongly agreed that the Assembly should change its name. In 2018, the commission announced its intention to introduce legislation to change the name of the Assembly. Later that year, the Llywydd – the Assembly's presiding officer – wrote to all Assembly Members explaining that the name change proposed in the Bill would be the monolingual name Senedd. In 2019, the Senedd and Elections (Wales) Bill, favouring the name Senedd, was introduced on behalf of the Assembly Commission. Following support of a subsequent amendment to the Bill which favoured a bilingual name for the institution, the Bill was passed by the Assembly on 27 November 2019 and was given Royal Assent on 15 January 2020. The Act changed the name of the Assembly to Senedd Cymru or the Welsh Parliament. Its guidance states that the institution will be commonly known as the Senedd in both languages. The name change came into effect on 6 May 2020. Members of the renamed body are known as Members of the Senedd (MS), or Aelodau o'r Senedd (AS) in Welsh.

Expansion

On 22 November 2021, Welsh Labour and Plaid Cymru agreed a co-operation deal that would see the implementation of 46 policies that the two parties shared. One of these was the expansion of the Senedd from 60 members to between 80 and 100 members.

At its conference on 12 March 2022, Welsh Labour unanimously approved increasing the size of the Senedd. "The expansion of the Senedd is essential because the journey of devolution is not yet complete", former First Minister Alun Michael said. "There is more to come. And the capacity needs to be there for those backbenchers to do the job of holding to account that you rightly said, cannot be done by to smaller number of representatives." Two weeks later, Plaid members backed the expansion proposal as well.

On 10 May 2022, plans to increase the number of MSs from 60 to 96 were unveiled, as well as the scrapping of first past the post, which, at the time, was used to elect 40 of the 60 Members of the Senedd (MSs). Drakeford said these changes were required as "report after report" had demonstrated that the Senedd in its current form "cannot do the job in the way that people in Wales have a right to expect it to be done". Welsh Lib Dem leader Jane Dodds criticised these plans, claiming that they would disproportionately impact smaller parties.

On 8 June 2022, the Senedd voted 40–14 in favour of expanding the number of MSs.

In 2023, the reform bill committee heard reforms included taking 32 new constituencies created that will be used in the 2024 general election and pairing them to create 16 Senedd constituencies – with each returning six members in multi-member districts. Opposition to the proposed closed list voting system was expressed by some Labour and Plaid Cymru representatives, while opposition to the overall expansion of the Senedd was expressed by some Labour representatives and the Conservatives.

Powers and status

The Senedd consists of 96 elected members. They use the title Member of the Senedd (MS) or Aelod o'r Senedd (AS). The executive arm of the Senedd, the Welsh Government, had been a Labour administration since its inception in 1999 until 2026. Currently it is led by First Minister, Rhun ap Iorwerth, of Plaid Cymru since May 2026. The government between 2007 and 2011, had been a coalition between Labour, led by First Minister Carwyn Jones and Plaid Cymru, led by Deputy First Minister Ieuan Wyn Jones; and between 2016 and 2021, Labour had been in coalition with the Liberal Democrats and an independent member. From 2021 to early 2026, the government has been a Labour minority government. The executive and civil servants are mainly based in Cardiff's Cathays Park while the MSs, the Senedd Commission and Ministerial support staff are based in Cardiff Bay, where a new £67 million building, the Senedd, has been built. From May 2026, a minority Plaid Cymru government has been formed and works in the Senedd.

Source and attribution

Adapted from “Senedd” by English Wikipedia contributors. Main paragraphs and sections are retained; tables, reference markers and technical markup are omitted. This is an encyclopedic adaptation, not a personal review. Original revision and contributor history ↗. Text is shared under CC BY-SA 4.0 ↗. Check current visitor access, tickets and transport with the relevant operator.