Core Cities Group
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|Headquarters||Express Networks, Manchester|
|Eight city councils|
The Core Cities Group is a self-selected and self-financed collaborative advocacy group of large regional cities in England and outside Greater London. The group was formed in 1995 as a partnership of eight city councils: Birmingham, Bristol, Leeds, Liverpool, Manchester, Newcastle, Nottingham, and Sheffield. The Core Cities Group has wide ranging interests, encompassing transport and connectivity, innovation and business support, skills and employment, sustainable communities, culture and creative industries, climate change, finance and industry, and governance. During 2012 the first wave of 'city deals' recognised the eight cities as "the largest and most economically important English cities outside of London".
Since 2010, British cities outside of England have started consultations for incorporation into the group. As of 14 August 2014, Glasgow has joined the group as the first non-English city. 
The group formed in 1995 and membership is made up of eight local authorities with city status; of which six are metropolitan borough councils and two are unitary authorities in the English local government system. The local authorities came together to promote their common interests of transport and connectivity, innovation and business support, skills and employment, sustainable communities, culture and creative industries, climate change, finance and industry, and governance. The eight city councils are also members of the pan-European Eurocities network, a group co-founded by Birmingham City Council.
Localism Act 2011
During the passage of the Localism Bill in 2011, the group promoted the 'Core Cities amendment' to allow for bespoke decentralisation to its members, which was successfully incorporated. Several of the 'City Deals' subsequently agreed between the Cabinet Office/Department for Communities and Local Government in 2012 included enhanced powers and city regional working at their core, including new combined authorities, thanks to the provision.
|City||County||Region||Local authority||Type||Population||Urban area||Metropolitan area|
|Birmingham||West Midlands||West Midlands||Birmingham City Council||Metropolitan borough||1,085,400||2,440,986||3,683,000|
|Bristol||Bristol||South West England||Bristol City Council||Unitary authority||428,200||587,400||1,041,000|
|Leeds||West Yorkshire||Yorkshire and the Humber||Leeds City Council||Metropolitan borough||751,500||1,499,465||2,302,000|
|Liverpool||Merseyside||North West England||Liverpool City Council||Metropolitan borough||466,400||816,216||2,241,000|
|Manchester||Greater Manchester||North West England||Manchester City Council||Metropolitan borough||503,100||2,553,379||2,556,000|
|Newcastle||Tyne and Wear||North East England||Newcastle City Council||Metropolitan borough||280,200||879,996||1,599,000|
|Nottingham||Nottinghamshire||East Midlands||Nottingham City Council||Unitary authority||305,700||666,358||1,543,000|
|Sheffield||South Yorkshire||Yorkshire and the Humber||Sheffield City Council||Metropolitan borough||552,700||640,720||1,569,000|
Source for metropolitan area populations: 
- Manchester City Deal brings 6,000 jobs boost - Announcements - Inside Government - GOV.UK. Communities.gov.uk (2012-03-20). Retrieved on 2013-07-17.
- . birminghamnewsroom.com 2014-08-14.
- . corecities.com. 2011-03-03.
-  'Core Cities amendment to the Localism Bill clears the House of Commons', Core Cities Group website
- City Deals Cabinet Office website
- "British urban pattern: population data" (PDF). ESPON project 1.4.3 Study on Urban Functions. European Spatial Planning Observation Network. March 2007. p. 119. Retrieved 2010-02-22.