The Preserved county of Mid Glamorgan is divided into 6 parliamentary constituencies, one of which is shared with Gwent. The current boundaries have been effective since the 2007 National Assembly for Wales election and the 2010 United Kingdom general election. [1]
Name | 1997 to 2010 | From 2010 |
---|---|---|
* pre-2010 parts coloured white were included and were in South Glamorgan | ![]() | ![]() |
Conservative † Labour ‡
Constituency | Electorate | Majority | Member of Parliament | Nearest opposition | Map reference above | ||
---|---|---|---|---|---|---|---|
Bridgend CC | 63,303 | 1,157 | Jamie Wallis † | Madeleine Moon ‡ | 1 | ||
Cynon Valley CC | 51,134 | 8,822 | Beth Winter ‡ | Pauline Church † | 2 | ||
Merthyr Tydfil and Rhymney CC (western part is in Mid Glamorgan) | 56,322 | 10,606 | Gerald Jones ‡ | Sarah Jones † | 3 | ||
Ogmore CC | 57,581 | 7,805 | Chris Elmore ‡ | Sadie Vidal † | 4 | ||
Pontypridd CC | 60,327 | 5,887 | Alex Davies-Jones ‡ | Sam Trask † | 5 | ||
Rhondda CC | 50,262 | 11,440 | Chris Bryant ‡ | Hannah Jarvis † | 6 |
The Boundary Commission for Wales submitted their final proposals in respect of the Sixth Periodic Review of Westminster Constituencies (the 2018 review) in September 2018. Although the proposals were immediately laid before Parliament they were not brought forward by the Government for approval. Accordingly, they didnot come into effect for the 2019 election which took place on 12 December 2019, and which was contested using the constituency boundaries in place since 2010.
Under the terms of the Parliamentary Voting System and Constituencies Act 2011, the Sixth Review was based on reducing the total number of MPs from 650 to 600 and a strict electoral parity requirement that the electorate of all constituencies should be within a range of 5% either side of the electoral quota.
On 24 March 2020, the Minister of State for the Cabinet Office, Chloe Smith, issued a written statement to Parliament setting out the Government's thinking with regard to parliamentary boundaries. They propose to bring forward primary legislation to remove the statutory obligation to implement the 2018 Boundary Review recommendations, as well as set the framework for future boundary reviews in time for the next review which is due to begin in early 2021 and report no later than October 2023. It is proposed that the number of constituencies now remains at the current level of 650, rather than being reduced to 600, while retaining the requirement that the electorate should be no more than +/- 5% from the electoral quota. [2]
The implemented Fifth Periodic Review of Westminster constituencies.
In the United Kingdom, the boundary commissions are non-departmental public bodies responsible for determining the boundaries of parliamentary constituencies for elections to the House of Commons. There are four boundary commissions: one each for England, Scotland, Wales and Northern Ireland.
Cities of London and Westminster is a constituency returning a single Member of Parliament (MP) to the House of Commons in the United Kingdom Parliament. As with all constituencies, the election is decided using the first past the post system of election. From its creation at the 1950 general election to the 2024 general election, the constituency had always elected the candidate nominated by the Conservative Party.
As a result of the Fifth Periodical Review of the Boundary Commission for Scotland, Scotland was covered by 59 constituencies of the House of Commons of the United Kingdom Parliament: 19 burgh constituencies and 40 county constituencies. These constituencies were used from the 2005 to the 2019 general elections, and were replaced by new constituencies at the 2024 election.
The Parliament of the United Kingdom currently has 650 parliamentary constituencies across the constituent countries, each electing a single member of parliament (MP) to the House of Commons by the plurality voting system, ordinarily every five years. Voting last took place in all 650 of those constituencies at the United Kingdom general election on 4 July 2024.
Scottish Westminster constituencies were Scottish constituencies of the House of Commons of the Parliament of Great Britain, normally at the Palace of Westminster, from 1708 to 1801, and have been constituencies of the House of Commons of the Parliament of the United Kingdom, also at Westminster, since 1801. Constituency boundaries have changed on various occasions, and are now subject to both periodical and ad hoc reviews of the Boundary Commission for Scotland.
The Senedd constituencies and electoral regions are the electoral districts used to elect members of the Senedd to the Senedd, and have been used in some form since the first election of the then National Assembly for Wales in 1999. New boundaries were introduced for the 2007 elections and currently consist of forty constituencies and five regions. The five electoral regions are: Mid and West Wales, North Wales, South Wales Central, South Wales East, and South Wales West, with the forty constituencies listed below. Voting last took place in all districts in the 2021 Senedd election, and is not used for local government.
The Fifth Periodic Review of Westminster constituencies was undertaken between 2000 and 2007 by the four boundary commissions for England, Scotland, Wales and Northern Ireland for the UK Parliament. The changes for England, Wales and Northern Ireland took effect at the 2010 United Kingdom general election; that for Scotland took effect at the 2005 election. All of the recommendations were approved.
The Parliamentary Voting System and Constituencies Act 2011(c. 1) is an Act of the Parliament of the United Kingdom that made provision for the holding of a referendum on whether to introduce the Alternative Vote system in all future general elections to the UK Parliament and also made provision on the number and size of parliamentary constituencies. The Bill for the Act was introduced to the House of Commons on 22 July 2010 and passed third reading on 2 November by 321 votes to 264. The House of Lords passed the Bill, with amendments, on 14 February 2011, and after some compromises between the two Houses on amendments, it received Royal Assent on 16 February 2011.
The 2013 Periodic Review of Westminster constituencies, also known as the Sixth Review, was an ultimately unfruitful cycle of the process by which constituencies of the House of Commons of the United Kingdom are reviewed and redistributed. The four UK boundary commissions carried out their reviews between 2011 and 2013, but their recommendations were not taken up by the government and instead the 2018 Periodic Review of Westminster constituencies was carried out from 2016 to 2018. That review was also not implemented and its results were formally laid aside in 2020.
The 2023 Periodic Review of Westminster constituencies was the most recent cycle of the process to redraw the constituency map for the House of Commons. The new constituency boundaries were approved by the Privy Council on 15 November 2023 and came into law on 29 November.
The 2018 Periodic Review of Westminster constituencies was an ultimately unfruitful cycle of the process by which constituencies of the House of Commons of the United Kingdom are reviewed and redistributed. The four UK boundary commissions carried out their reviews between 2016 and 2018, but their recommendations were not taken up by the government and were formally laid aside in 2020.
This article covers the timeline of the most recent cycle of the process to redraw the constituency map for the House of Commons, namely the 2023 Periodic Review of Westminster constituencies. The new constituency borders came into law on 29 November 2023. For a summary of the outcome of the review, see 2023 Periodic Review of Westminster constituencies.