Failed sixth periodic review Under the terms of the
Parliamentary Voting System and Constituencies Act 2011, the
Sixth Periodic Review of Westminster Constituencies (the 2018 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. The Boundary Commission for Wales submitted their final proposals in respect of the Sixth Review in September 2018. Although the proposals were immediately laid before
Parliament they were not brought forward by the
Government for approval. Accordingly, they did not 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. 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. Subsequently, the Parliamentary Constituencies Act 2020 was passed into law on 14 December 2020 which formally removed the duty to implement the 2018 review and set out the framework for future boundary reviews.
2023 periodic review The
Parliamentary Constituencies Act 2020 was passed in December 2020, and the publication of the most recent data of electorate sizes of constituencies on 5 January 2021, lead the
Boundary Commission for Wales to begin its review of the parliamentary constituencies in Wales, with the commission required to publish its final recommendations for boundary changes by 1 July 2023. By December 2021, the commission published the responses collected during the consultation period, and then conducted a six-week 'secondary consultation. Unlike the previous periodic review, the total UK constituencies was kept at 650. When proportionally dividing the total 2021 electoral population of the United Kingdom using a statutory formula between the constituent countries of the UK, it results in England having 543 constituencies, Scotland having 57, Wales having 32 and Northern Ireland with the remaining 18. Each constituency recommended to have no more than 77,062 electors and no less than 69,724. Categorisation of status is purely based on the names used by the constituencies, if a new constituency largely overlaps with a previous one but was renamed, it is considered a new constituency. New – Did not exist previously with either the name or boundaries. Expanded – Keeps name but gains wards. Redefined – Keeps name but with other altered boundaries. Revived – Former constituency revived under the same name(s). == 2024 results ==