Parliament and elections data

Latest data

Government Chief Whips and Deputy Whips since 1945

Government Chief Whips and Deputy Chief Whips in the Commons and Lords since 1945.
- Government
- Parliament
Attendance of the Prime Minister at Prime Minister's Questions since 1979

Prime Minister's Questions (PMQs) attended by Prime Ministers since 1979, the number at which the Prime Minister was not present and related facts.
Prime Ministers

This briefing lists the Prime Ministers who have served in the United Kingdom since 1721. It also provides information on changes of Prime Minister between general elections since 1900.

Elections

Access original datasets and analysis covering UK Parliament elections from 1918, including by-elections from 1945.
Government

Find the latest data about MPs who have roles in Government, such as lists of Prime Ministers, ministerial office holders and more.
MPs

Browse data and analysis on the characteristics of MPs in the UK Parliament.
Parliament

Find data and analysis on select committees, debates, divisions and parliamentary procedure.

Constituency and local area data

Browse and compare local-level data between constituencies and other small areas on topics such as housing, health, and energy.
Economic data

View data relating to the UK economy, including the labour market, trade, business, and public finances.
Data

An overview of the data produced by the Commons Library. Find local-level data, Parliament and elections data, and economic data.