Greater Manchester is not entirely built-up. Although Manchester forms a conurbation along with Salford, Trafford and Stockport, other boroughs, such as Wigan and Bury are clearly separate.
The Greater Manchester Police , who are overseen by a joint Police authority.
The Greater Manchester County Fire Service , who are administered by a joint "Fire and Civil Defence Authority".
These are administered by joint-boards which are made up of councillors appointed from each of the ten boroughs.
The boroughs jointly own the Manchester Airport Group which controls Manchester Airport and several other UK airports. Other services are directly funded and managed by the local councils.
Before 1974 the area of Greater Manchester was split between Cheshire and Lancashire with numerous parts being independent county boroughs. The area was informally known as 'SELNEC', for 'South East Lancashire North East Cheshire'. Also small parts of the West Riding of Yorkshire (around Saddleworth) and Derbyshire were covered.
SELNEC had been proposed by the Redcliffe-Maud Report of 1969 as a 'metropolitan area'. This had roughly the same northern boundary as today's Greater Manchester, but covered much more territory in north-east Cheshire - including Macclesfield and Warrington. It also covered Glossop in Derbyshire.
In 1969 a SELNEC Passenger Transport Authority was set up, which covered an area smaller than the proposed SELNEC, but different to the eventual Greater Manchester.
Although the Redcliffe-Maud report was rejected by the Conservative Party government after it won the 1970 general election, it was committed to local government reform, and accepted the need for a county based on Manchester. Its original proposal was much smaller than the Redcliffe-Maud Report's SELNEC, but further fringe areas such as Wilmslow, Warrington and Glossop were trimmed from the edges and included instead in the shire counties. Greater Manchester was eventually established in 1974.