Region Composition

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Region composition

Electoral Calculus Regions are specially designed to help analyse electoral geography. They have been chosen so that they are approximately of equal population, and also so that they are as politically homogeneous as possible. They are kept constant over the decades so that regional-based historical analysis can be easily performed. They do not coincide with current administrative regional definitions, which instead are our Areas.

There are twenty regions. They are listed below, along with their constituent unofficial "Historic Counties", plus official district, borough or unitary local authorities. The Historic Counties are shown to help interpretation and are similar, but not identical, to the official Preserved County names. The Historic Counties derive from the 1974 reorginisation and include Cleveland (renamed "Teesside"), Humberside (renamed "Humber area"), Tyne and Wear (renamed "Newcastle area") and Avon (renamed "Bristol area"), with additional modifications for clarity, such as dividing up Greater Manchester and the West Midlands. Note that "South London" contains three boroughs which are north of the Thames in order to keep the two halves of London roughly equal size.

Historic CountyDistrict, Borough or Unitary Council
1. East Scotland
BordersScottish Borders
CentralClackmannanshire, Falkirk, Stirling
Edinburgh areaEast Lothian, Edinburgh, Midlothian, West Lothian
GrampianAberdeen, Aberdeenshire, Moray
Orkney and ShetlandOrkney Islands, Shetland Islands
TaysideAngus, Dundee, Perth and Kinross
Western IslesNa h-Eileanan an lar
2. West Scotland
Argyll and ButeArgyll and Bute
Ayrshire and LanarkEast Ayrshire, North Ayrshire, South Ayrshire, South Lanarkshire
Dumfries and GallowayDumfries and Galloway
Glasgow areaEast Dunbartonshire, East Renfrewshire, Glasgow, Inverclyde, North Lanarkshire, Renfrewshire, West Dunbartonshire
3. Northern Ireland
AntrimAntrim, Ballymena, Ballymoney, Belfast, Carrickfergus, Larne, Lisburn, Moyle, Newtownabbey
ArmaghArmagh, Craigavon
DownArds, Banbridge, Castlereagh, Down, Newry and Mourne, North Down
LondonderryColeraine, Derry, Limavady, Magherafelt
TyroneCookstown, Dungannon and South Tyrone, Omagh, Strabane
4. North
CumbriaAllerdale, Barrow-in-Furness, Carlisle, Copeland, Eden, South Lakeland
DurhamDarlington, Durham
Newcastle areaGateshead, Newcastle upon Tyne, North Tyneside, South Tyneside, Sunderland
TeessideHartlepool, Middlesbrough, Redcar and Cleveland, Stockton-on-Tees
5. Lancashire
LancashireBlackburn with Darwen, Blackpool, Burnley, Chorley, Fylde, Hyndburn, Lancaster, Pendle, Preston, Ribble Valley, Rossendale, South Ribble, West Lancashire, Wyre
MerseysideKnowsley, Liverpool, Sefton, St Helens, Wirral
6. Greater Manchester
Central ManchesterManchester, Salford, Trafford
Eastern ManchesterOldham, Rochdale, Stockport, Tameside
Western ManchesterBolton, Bury, Wigan
7. Yorkshire
North YorkshireCraven, Hambleton, Harrogate, Richmondshire, Ryedale, Scarborough, Selby, York
West YorkshireBradford, Calderdale, Kirklees, Leeds, Wakefield
8. Humberside
Humber areaEast Riding of Yorkshire, Kingston Upon Hull, North East Lincolnshire, North Lincolnshire
LincolnshireBoston, East Lindsey, Lincoln, North Kesteven, South Holland, South Kesteven, West Lindsey
South YorkshireBarnsley, Doncaster, Rotherham, Sheffield
9. West Midlands
Black CountryDudley, Sandwell, Walsall, Wolverhampton
Coventry and SolihullCoventry, Solihull
10. East Midlands
DerbyshireAmber Valley, Bolsover, Chesterfield, Derby, Derbyshire Dales, Erewash, High Peak, North East Derbyshire, South Derbyshire
LeicestershireBlaby, Charnwood, Harborough, Hinckley and Bosworth, Leicester, Melton, North West Leicestershire, Oadby and Wigston, Rutland
NottinghamshireAshfield, Bassetlaw, Broxtowe, Gedling, Mansfield, Newark and Sherwood, Nottingham, Rushcliffe
WarwickshireNorth Warwickshire, Nuneaton and Bedworth, Rugby, Stratford On Avon, Warwick
11. Severn
CheshireCheshire East, Cheshire West and Chester, Halton, Warrington
Hereford and WorcestershireBromsgrove, Herefordshire, Malvern Hills, Redditch, Worcester, Wychavon, Wyre Forest
ShropshireShropshire, Telford and Wrekin
StaffordshireCannock Chase, East Staffordshire, Lichfield, Newcastle-under-Lyme, South Staffordshire, Stafford, Staffordshire Moorlands, Stoke-on-trent, Tamworth
12. Wales
ClwydConwy, Denbighshire, Flintshire, Wrexham
DyfedCarmarthenshire, Ceredigion, Pembrokeshire
GwentBlaenau Gwent, Caerphilly, Monmouthshire, Newport, Torfaen
GwyneddGwynedd, Isle of Anglesey
Mid GlamorganBridgend, Merthyr Tydfil, Rhondda Cynon Taf
South GlamorganCardiff, Vale of Glamorgan
West GlamorganNeath Port Talbot, Swansea
13. East Anglia
BedfordshireBedford, Central Bedfordshire, Luton
CambridgeshireCambridge, East Cambridgeshire, Fenland, Huntingdonshire, Peterborough, South Cambridgeshire
NorfolkBreckland, Broadland, Great Yarmouth, King's Lynn and West Norfolk, North Norfolk, Norwich, South Norfolk
NorthamptonshireCorby, Daventry, East Northamptonshire, Kettering, Northampton, South Northamptonshire, Wellingborough
SuffolkBabergh, East Suffolk, Ipswich, Mid Suffolk, West Suffolk
14. Essex
BuckinghamshireAylesbury Vale, Chiltern, Milton Keynes, South Bucks, Wycombe
EssexBasildon, Braintree, Brentwood, Castle Point, Chelmsford, Colchester, Epping Forest, Harlow, Maldon, Rochford, Southend-on-Sea, Tendring, Thurrock, Uttlesford
HertfordshireBroxbourne, Dacorum, East Hertfordshire, Hertsmere, North Hertfordshire, St Albans, Stevenage, Three Rivers, Watford, Welwyn Hatfield
15. West
Bristol areaBath and North East Somerset, Bristol, North Somerset, South Gloucestershire
GloucestershireCheltenham, Cotswold, Forest of Dean, Gloucester, Stroud, Tewkesbury
OxfordshireCherwell, Oxford, South Oxfordshire, Vale of White Horse, West Oxfordshire
WiltshireSwindon, Wiltshire
16. North London
North London Barking and Dagenham, Barnet, Brent, Camden, City of London, City of Westminster, Enfield, Hackney, Hammersmith and Fulham, Haringey, Harrow, Havering, Islington, Kensington and Chelsea, Newham, Redbridge, Tower Hamlets, Waltham Forest
17. South London
South LondonBexley, Bromley, Croydon, Ealing, Greenwich, Hillingdon, Hounslow, Kingston upon Thames, Lambeth, Lewisham, Merton, Richmond upon Thames, Southwark, Sutton, Wandsworth
18. South West
CornwallCornwall, Isles of Scilly
DevonEast Devon, Exeter, Mid Devon, North Devon, Plymouth, South Hams, Teignbridge, Torbay, Torridge, West Devon
Dorset'Bournemouth, Christchurch and Poole', Dorset
SomersetMendip, Sedgemoor, Somerset West and Taunton, South Somerset
19. South
BerkshireBracknell Forest, Reading, Slough, West Berkshire, Windsor and Maidenhead, Wokingham
HampshireBasingstoke and Deane, East Hampshire, Eastleigh, Fareham, Gosport, Hart, Havant, Isle of Wight, New Forest, Portsmouth, Rushmoor, Southampton, Test Valley, Winchester
SurreyElmbridge, Epsom and Ewell, Guildford, Mole Valley, Reigate and Banstead, Runnymede, Spelthorne, Surrey Heath, Tandridge, Waverley, Woking
20. South East
East SussexBrighton and Hove, Eastbourne, Hastings, Lewes, Rother, Wealden
KentAshford, Canterbury, Dartford, Dover, Gravesham, Maidstone, Medway, Sevenoaks, Shepway, Swale, Thanet, Tonbridge and Malling, Tunbridge Wells
West SussexAdur, Arun, Chichester, Crawley, Horsham, Mid Sussex, Worthing

For reference, the following table describes the links between the Electoral Calculus regions and the official government areas:

AreaElectoral Calculus equivalent regionsCounties (historic)
ScotlandEast Scotland
West Scotland
All Scotland
Northern IrelandNorthern IrelandAll Northern Ireland
North EastNorth
Northumberland, Newcastle area, Durham, Teesside
North WestLancashire
(+Cumbria, +Cheshire)
Cumbria, Lancashire, Merseyside, Manchester boroughs,
North Yorkshire, West Yorkshire, South Yorkshire, Humber area
WalesWalesAll Wales
West MidlandsSevern
West Midlands
(−Cheshire, +Warwickshire)
Shropshire, Staffordshire, Hereford & Worcestershire, Birmingham, Black Country, Coventry and Solihull, Warwickshire
East MidlandsEast Midlands
(−Warwickshire, +Lincolnshire, +Northamptonshire)
Derbyshire, Leicestershire, Lincolnshire, Northamptonshire, Nottinghamshire
AngliaEast Anglia
(−Buckinghamshire, −Northamptonshire)
Bedfordshire, Cambridgeshire, Norfolk, Suffolk, Essex, Hertfordshire
South WestSouth West
Cornwall, Devon, Somerset, Dorset, Bristol area, Gloucestershire, Wiltshire
LondonNorth London
South London
All London Boroughs
South EastSouth
South East
(+Buckinghamshire, +Oxfordshire)
Berkshire, Buckinghamshire, Hampshire, Oxfordshire, Surrey, West Sussex, East Sussex, Kent

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