Here is a list of useful and interesting websites providing information about coal mining in Britain:
Access to Archives
A2A database contains catalogues of archives held across England and dating from the 1900s to the present day.
The Coal Authority
The Coal Authority is a government organisation which licenses coal mining operations in Great Britain today and provides public access to information on past and present coal mining operations.
Durham Mining Museum
Wealth of mining information covering County Durham, Northumberland, Cumberland, Westmorland