Members of Parliament holding dual mandates
MPs who also held seats in the European Parliament, Northern Ireland Assembly, Scottish Parliament, and Senedd Cymru / National Assembly for Wales, since 1973.
Number of seats in the House of Commons since 1801
The number of seats contested in general elections to the House of Commons from 1801 to today. Items of legislation enabling changes to the number of seats are listed.
Government Chief Whips and Deputy Whips since 1945
Government Chief Whips and Deputy Chief Whips in the Commons and Lords since 1945
