UK parliamentary by-elections since 1945
This list notes the number of by-elections by session since 1945-46 and also lists the successful candidate in by-elections since 2005.
MPs' parliamentary activities: An interactive dashboard
Filter by constituency to explore MPs' parliamentary activities, including the debates and urgent questions they raise, and how they vote in divisions.
Elections data
Access briefings and original datasets covering UK Parliament elections from 1918, including by-elections from 1945. Find data by constituency as well as original analysis of election results
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UK Election Statistics: 1918-2023: A century of elections
This Commons Library briefing paper presents an overview of UK election results since 1918. It provides summary results for all elections from 1918 to 2023, giving more extensive details about UK general elections. It also includes elections to the European Parliament, devolved legislatures and local government.
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Constituency data: electorates
Constituency-level data on electorates in the UK, including data for both the parliamentary and the local government franchise
Government data
Read the latest data about the activity of members of the government in Parliament. Here, you can access a range of facts and figures in various formats about the government
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Attendance of the Prime Minister at Prime Minister’s Questions (PMQs) since 1979
Prime Minister's Questions (PMQs) attended by Prime Ministers since 1979 with details of ministers providing cover.
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Ministers in the Conservative Governments: 2015, 2017 and 2019 Parliaments
This list notes ministerial office holders since the 2015 General Election.
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Prime Ministers
This note lists the Prime Ministers that have served in the United Kingdom, since 1721. It also provides information on changes of Prime Ministers between elections since 1900.
MP data
Find quick-read articles, datasets and longer briefings on the makeup of the UK Parliament and the characteristics of MPs
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Appointments to the Chiltern Hundreds and Manor of Northstead Stewardships since 1880
Resignations of MPs from the House of Commons since 1880.
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Female Members of Parliament
This list identifies all the women who have ever been elected to the House of Commons. They are reported election by election, then in the order in which they were sworn in, when more than one MP was elected on the same day.
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Youngest Members of Parliament since 1979
A list of the youngest MPs, when elected, since 1979.
Parliamentary data
Find facts and figures relating to legislation, MPs, ministers, select committees, debates, divisions and parliamentary procedure. Some lists date back hundreds of years to the present day but many cover the last seven to ten Parliaments
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Hybrid bills receiving Royal Assent since 1979
Hybrid bills are public bills (bills containing provisions that would affect the general public) which also contain provisions affecting the interests of certain individuals or organisations.
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Commons Opposition Day debates since 1992
A list of opposition day debates since 1992 with links to debates and divisions on opposition day motions.
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Appointments to the Chiltern Hundreds and Manor of Northstead Stewardships since 1880
Resignations of MPs from the House of Commons since 1880.