List of United Kingdom Parliament constituencies

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The 2010 constituencies showing the final results.

There are 650 single-member^[1] constituencies in the United Kingdom, each electing a Member of Parliament to the House of Commons at least every five years. Voting took place in 649 of those constituencies at the United Kingdom general election on 6 May 2010. In the remaining constituency, Thirsk and Malton, voting was postponed until 27 May due to the death of a candidate.^[2]

The number of seats rose from 646 at the 2005 general election after proposals made by the Boundary Commissions for England, Wales and Northern Ireland were adopted through statutory instruments.^[3][4][5][6] Constituencies in Scotland remained unchanged, with the Boundary Commission for Scotland having completed a review shortly prior to the 2005 general election.

Primary legislation provides for the independence of the Boundary Commissions for each of the four parts of the UK, the number of seats for each of the countries, permissible factors to use in departing from any old boundaries and a strong duty to consult. For the 2013 review this is primarily the Parliamentary Voting System and Constituencies Act 2011. The Sainte-Laguë formula method is used to form groups of seats split between the four parts of the United Kingdom and the English Regions (as defined by EU Parliament Elections).^[7]

The electorate figures given in the second column of the tables below are those used by the Commissions during their reviews. These electorate figures date from the start of the review in each country: England, February 2000;^[8] Scotland, June 2001; Wales, December 2002; and Northern Ireland, May 2003. Of the 650 seats listed below, 533 are in England, 59 in Scotland, 40 in Wales and 18 in Northern Ireland.

Constituencies in the United Kingdom

For MPs elected in the latest election (also with nominal party holding the seat in the previous election) see List of MPs elected in the United Kingdom general election, 2010

Summary of fundamental boundary changes for the 2010 general election

• Scotland – No changes from 2005 election
• Wales – No extra or fewer seats, although significant changes led to three abolitions and the creation of Aberconwy, Arfon and Dwyfor Meirionnydd
• Northern Ireland – No extra or fewer seats allocated
• England

• North Yorkshire, Hampshire, Warwickshire, Derbyshire, Norfolk, Essex, Lancashire, Northamptonshire and Cornwall gained seats. Isle of Wight maintained its status as one constituency, the largest by electorate.
• The City of York was divided into two seats neither overlapping part of North Yorkshire.
• North London, Birmingham and the metropolitan counties of Greater Manchester, Merseyside, Tyne and Wear and South Yorkshire lost a seat each.
• Herefordshire and Worcestershire to reflect full reinstatement as separate counties were considered in separate reviews leading to Herefordshire split into two simple constituencies.
• Bath, Bristol and Somerset underwent arguably the most significant changes to reflect the abolition of Avon.

Updated electorate figures from December 2010 have been added for the English,^[9] Northern Irish,^[10] Scottish^[11] and Welsh^[12] constituencies.

References

• Boundary Commission for N.I. Fifth Periodical Report (HM Command Paper 73) - Parliamentary Constituencies of Northern Ireland. Retrieved 2013-07-19