List of Parliamentary constituencies in Berkshire

  Conservative †   Labour ‡   Liberal Democrat ¤

Name[nb 1]	Electorate[1]	Majority[2][nb 2]	Member of Parliament[2]		Nearest opposition[2]		Map
Bracknell CC	78,978	19,829		James Sunderland †		Paul Bidwell ‡
Maidenhead CC	76,668	18,846		Theresa May †		Joshua Reynolds ¤
Newbury CC	83,414	16,047		Laura Farris †		Lee Dillon ¤
Reading East BC	77,152	5,924		Matt Rodda ‡		Craig Morley †
Reading West CC	74,137	4,117		Alok Sharma †		Rachel Eden ‡
Slough BC	86,818	13,640		Tan Dhesi ‡		Kanwal Toor Gill †
Windsor CC	75,038	20,079		Adam Afriyie †		Julian Tisi ¤
Wokingham CC	83,953	7,383		John Redwood †		Dr Phillip Lee ¤

The Fifth Periodic Review of Westminster constituencies resulted in modest changes, including the transfer of Bray from Windsor to Maidenhead, Binfield from Bracknell to Windsor and the return of Foxborough ward from Windsor to Slough. Further marginal changes due to revision of local authority wards.

Constituency	Pre-2010 boundaries	Post-2010 boundaries
1. Bracknell CC
2. Maidenhead CC
3. Newbury CC
4. Reading East BC
5. Reading West CC
6. Slough BC
7. Windsor CC
8. Wokingham CC

The Boundary Commission for England 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 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.

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.[3] Subsequently, the Parliamentary Constituencies Act 2020[4] was passed into law on 14 December 2020. This formally removed the duty to implement the 2018 review and set out the framework for future boundary reviews. The Act provided that the number of constituencies should remain 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.

The Act specified that the next review should be completed no later than 1 July 2023 and the Boundary Commission formally launched the 2023 Review on 5 January 2021.[5] See 2023 Periodic Review of Westminster constituencies for further details.

Primary data source: House of Commons research briefing - General election results from 1918 to 2019[6]

2019

The number of votes cast for each political party who fielded candidates in constituencies comprising Berkshire in the 2019 general election were as follows:

Party	Votes	%	Change from 2017	Seats	Change from 2017
Conservative	222,532	50.1%	3.8%	6	0
Labour	115,747	26.1%	6.7%	2	0
Liberal Democrats	87,532	19.7%	9.4%	0	0
Greens	13,796	3.1%	1.5%	0	0
Brexit	2,284	0.5%	new	0	0
Others	2,044	0.5%	0.9%	0	0
Total	443,935	100.0		8

• List of Parliamentary constituencies in the South East (region)
• History of Parliamentary constituencies and boundaries in Berkshire