what parts does GREAT BRITAIN consist of and what are their capitals?

The UK consists of 4 administrative and political divisions (historical provinces) : 

England (39 counties, 6 Metropolitan counties and greater London) - ADM. centre London 
Wales (22 unitary education: 9 counties, 3 cities and 10 towns counties) - ADM. centre Cardiff 
Scotland (12 provinces: 9 districts and 3 main area) - ADM. centre Edinburgh 
Northern Ireland (26 counties) - ADM. centre Belfast

Great Britain is consisted of Scotland,England,Wales and Northern Ireland.The capital of Scotland is Edinburgh.London is the capital of England. The capital of Nothern Ireland is Belfast and Cardiff is the capital of Wales.