List of MPs elected in the United Kingdom general election, 2015

Fifty-sixth Parliament of the United Kingdom
55th Parliament 57th Parliament
Palace of Westminster.jpg
Term27 May 2015 – 3 May 2017
ElectionUnited Kingdom general election, 2015
GovernmentFirst May ministry
Second Cameron ministry – until 13 July 2016
House of Commons
SpeakerJohn Bercow
LeaderDavid Lidington
Chris Grayling – until 14 July 2016
Prime MinisterTheresa May
David Cameron – until 13 July 2016
Leader of the OppositionJeremy Corbyn
Harriet Harman – acting until 12 September 2015
Third-party leaderAngus Robertson
House of Lords
Lord SpeakerThe Lord Fowler
The Baroness D'Souza – until 31 August 2016
LeaderThe Baroness Evans of Bowes Park
The Baroness Stowell of Beeston – until 14 July 2016
Leader of the OppositionThe Baroness Smith of Basildon
Third-party leaderThe Lord Wallace of Tankerness
Crown-in-ParliamentQueen Elizabeth II
1st27 May 2015 (2015-05-27) – 12 May 2016 (2016-05-12)
2nd18 May 2016 (2016-05-18) – 3 May 2017 (2017-05-03)
This map shows by geography the colours each of the 650 constituencies of the 2015-17 Parliament.

The fifty-sixth Parliament of the United Kingdom was the legislature of the United Kingdom following the 2015 general election of Members of Parliament (MPs) to the House of Commons. Parliament, which consists of the House of Lords and the elected House of Commons, was convened on 27 May 2015 at the Palace of Westminster by Queen Elizabeth II. It was dissolved just after midnight on 3 May 2017, being 25 working days ahead of the 2017 general election on 8 June 2017. The dissolution was originally scheduled for 2020, but took place almost three years early following a call for a snap election by Prime Minister Theresa May which received the necessary two-thirds majority in a 522 to 13 vote in the House of Commons on 19 April 2017. It was the shortest Parliament since 1974.[1]

The election saw each of Parliament's 650 constituencies return one MP to the House of Commons. It resulted in a Conservative majority, a massive loss of seats for the Liberal Democrats, and all but three Scottish seats going to the SNP.

UKIP won its first seat at a general election. Alliance and Respect each had their representation from the last Parliament wiped out. The UUP won representation after none in the previous Parliament.

Notable newcomers to enter the House of Commons in this General Election included Ian Blackford, Liz Saville Roberts, Rebecca Long-Bailey, Angela Rayner, Antoinette Sandbach, Mhairi Black, Oliver Dowden, Chris Matheson, Heidi Allen, Keir Starmer, Stephen Kinnock, Jess Phillips, Ruth Smeeth, Kelly Tolhurst, Tulip Siddiq, and Clive Lewis.

During the 2015-17 Parliament, John Bercow was the Speaker, David Cameron and Theresa May served as Prime Minister, and Harriet Harman and Jeremy Corbyn served as Leader of the Opposition.

House of Commons composition

Below is a graphical representation of the House of Commons showing a comparison of party strengths as it was directly after the 2015 general election. This is not a seating plan of the House of Commons, which has five rows of benches on each side, with the government party to the right of the Speaker and opposition parties to the left, but with room for only around two-thirds of MPs to sit at any one time.

House of Commons 2015.svg

This table shows the number of MPs in each party:

Affiliation Members[2]
At 2015 election At dissolution
Conservative 330 330
Labour 232 229
SNP 56 54
Liberal Democrat 8 9
DUP 8 8
  Independent 0 4
Sinn Féin 4 4
Plaid Cymru 3 3
SDLP 3 3
UUP 2 2
Green 1 1
Independent Unionist 1 1
  Speaker 1 1
UKIP 1 0
Vacant seats 0 1
Total 650 650
Government majority 16 17
  • See here for a full list of changes during the fifty-sixth Parliament.
  • In addition to the parties listed in the table above, the Co-operative Party was also represented in the House of Commons by Labour MPs sitting with the Labour Co-operative designation. The number of these MPs was 24 after the general election, and was 28 at dissolution.
  • The actual government majority is calculated as Conservative MPs less all other parties. This calculation excludes the Speaker, Deputy Speakers (two Labour and one Conservative) and Sinn Féin (who follow a policy of abstentionism).