List of Parliamentary constituencies in London

The region of Greater London, including the City of London, is divided into 73 parliamentary constituencies which are sub-classified as borough constituencies, affecting the type of electoral officer and level of expenses permitted.
Results history.
"Primary data source:" House of Commons research briefing - General election results from 1918 to 2019
2019.
The number of votes cast for each political party who fielded candidates in constituencies comprising the London region in the 2019 general election were as follows:
Percentage votes.
"Key:"
CON - Conservative Party, including National Liberal Party up to 1966
LAB - Labour Party
LIB - Liberal Party up to 1979; SDP-Liberal Alliance 1983 & 1987; Liberal Democrats from 1992
UKIP/Br - UK Independence Party 2010 to 2017 (included in Other up to 2005 and in 2019); Brexit Party in 2019
Green - Green Party of England and Wales (included in Other up to 2005)
Seats.
"Key:"
CON - Conservative Party, including National Liberal Party up to 1966
LAB - Labour Party
LIB - Liberal Party up to 1979; SDP-Liberal Alliance 1983 & 1987; Liberal Democrats from 1992
OTH - 1945 - (1) Communist Party; (2) Independent Labour (Denis Pritt); 2005 - Respect (George Galloway)
Maps.
These are maps of the results of the last 13 general elections in London.
History.
Metropolitan area and County of London (1832–1965).
The Reform Act 1832 gave representation to the London metropolitan area from eight parliamentary boroughs, known as the metropolitan boroughs. This was expanded to ten boroughs in 1868. The Redistribution of Seats Act 1885 extended the area of parliamentary boroughs to the Metropolitan Board of Works area.
1885 to 1900.
A cell marked → (with a different colour background to the preceding cell) indicates that the previous MP continued to sit under a new party name.
Greater London (1965 to current).
1965 to 1974.
Despite Greater London being created in 1965 the old constituency boundaries remained in place until 1974.
1974 to 1983.
When Greater London was created in 1965 the existing constituencies crossed county boundaries. The constituency review reported in 1969, and was implemented for the February 1974 election. All 92 constituencies were contained within Greater London and each were within a single London borough, with the exception of the City of London and Westminster South. They were all borough constituencies. The constituencies were also used as electoral divisions for the Greater London Council from 1973 to 1986.
1983 to 1997.
The constituencies were redrawn for the 1983 election. All 84 constituencies were contained within Greater London and each were within a single London borough, with the exception of the City of London and Westminster South. They were all borough constituencies.
1997 to 2010.
The constituencies were redrawn for the 1997 election. All 74 constituencies were contained within Greater London. Constituencies crossed borough boundaries between Bexley and Greenwich; Ealing, and Hammersmith and Fulham; Kensington and Chelsea, Westminster and the City of London; Kingston upon Thames and Richmond upon Thames; Lambeth and Southwark; Newham and Tower Hamlets; and Redbridge and Waltham Forest. They were all borough constituencies.
Since 2010.
The constituencies were redrawn for the 2010 election. All 73 constituencies are contained within Greater London. Constituencies cross borough boundaries between Barking and Dagenham, and Havering; Brent and Camden; Harrow and Hillingdon; Kensington and Chelsea, and Hammersmith and Fulham; Redbridge and Waltham Forest; Bexley and Greenwich; Bromley and Lewisham; Kingston upon Thames and Richmond upon Thames; Lambeth and Southwark; and Westminster and the City of London. They are all borough constituencies.
Proposed boundary changes.
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. Subsequently, the Parliamentary Constituencies Act 2020 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. The Commission have calculated that the number of seats to be allocated to the London region will increase by 2, from 73 to 75.
See 2023 Periodic Review of Westminster constituencies for further details.
Historical representation by party.
A cell marked → (with a different colour background to the preceding cell) indicates that the previous MP continued to sit under a new party name.
North West London.
The boroughs of Hillingdon, Harrow, Brent, Ealing, Barnet, Camden, Hammersmith & Fulham, Kensington & Chelsea and Westminster, and the City of London.
North East London.
The boroughs of Barking & Dagenham, Enfield, Hackney, Haringey, Havering, Islington, Newham, Redbridge, Tower Hamlets and Waltham Forest.
South West London.
The boroughs of Croydon, Hounslow, Kingston, Merton, Richmond, Sutton and Wandsworth.
South East London.
The boroughs of Bexley, Bromley, Greenwich, Lambeth, Lewisham and Southwark.