List of United Kingdom Parliament constituencies (1997–2024) by region

These constituencies were used for elections to the House of Commons of the United Kingdom from 1997 to 2024.

Northamptonshire (6 then 7)
1seat won by Labour in a 2012 by-election

North East London Boroughs (23 then 22)
The boroughs of Enfield, Haringey, Islington, Hackney, Tower Hamlets, Newham, Waltham Forest, Redbridge, Barking & Dagenham and Havering.

North West London Boroughs (20)
The boroughs of Hillingdon, Harrow, Brent, Ealing, Barnet, Camden, Hammersmith & Fulham, Kensington & Chelsea and Westminster, and the City of London.

South East London Boroughs (16)
The boroughs of Lambeth, Southwark, Lewisham, Bromley, Greenwich and Bexley.

South West London Boroughs (15)
The boroughs of Hounslow, Richmond, Kingston, Wandsworth, Merton, Sutton and Croydon.

1MP sat as an Independent Conservative from Sep 2007 and an independent from Oct 2008

Seats: Votes:

Cleveland (6)
1 Seat won by the Conservatives in a May 2021 by-election

Cheshire (11)
1seat gained by the Conservatives in a May 2008 by-election

Greater Manchester (28 then 27)
1MP sat as an independent from Dec 2015

Lancashire (15 then 16)
1MP sat as an independent Sep 2013 - Apr 2014

Merseyside (16 then 15)
1MP sat as an independent from Sep 2007

Buckinghamshire (7)
1MP sat as Speaker from Jun 2009

Hampshire (17 then 18)
1MP sat as an independent from Jun 2013

2MP sat as an independent from Oct 2002

Shropshire (5)
1MP defected to the Liberal Democrats shortly after election

West Midlands (county) (29 then 28)
1MP sat as Independent Labour from Oct 2006

South Yorkshire (15 then 14)
1MP sat as an independent May 2010 - Feb 2011

2MP sat as an independent Oct 2010 - Jul 2012

West Yorkshire (23 then 22)
1seat won by Respect in a 2012 by-election

Northern Ireland (18)
1MP sat as an independent from Jun 2003 - Jan 2004

2MP sat as an independent from Jun 2003 - Jan 2004

3MP sat as an independent from Jun 2003 and defected to the Democratic Unionists in Jan 2004

Scotland
The Fifth Periodical Review of the Boundary Commission for Scotland related the boundaries of new constituencies to those of Scottish local government council areas and to local government wards. Apart from a few minor adjustments, the council area boundaries dated from 1996 and the ward boundaries dated from 1999. Some council areas were grouped to form larger areas and, within these larger areas, some constituencies straddle council area boundaries.

Lothian (10 then 9)
1MP sat as an independent from Sep 2015

Strathclyde (32 then 25)
1MP sat as an independent from Nov 2015

2seat gained by the SNP in a Jul 2008 by-election

3seat gained by Labour in a Nov 2009 by-election

4MP defected to the Respect Party in Jan 2004

Central (4 then 2)
1MP sat as an independent from Feb 2012

Fife (5 then 4)
1seat gained by the Liberal Democrats in a Feb 2006 by-election

Gwynedd (4 then 3)
Votes:

Clwyd (6 then 7)
In 2003 the border between Gwynedd and Clwyd was shifted. Conwy and Meirionydd Nant Conwy went from being entirely within Gwynedd to being split between Gwynedd and Clwyd.

Dyfed (5)
Votes:

Gwent (7)
Seats: