The music is black american and obscure - ghetto sounds which never made it, the followers are mostly white and fanatical - working class kids in the industrial heart of Britain who dance like there's no tomorrow to records most of us will never hear. The Northern Soul Scene is a strange mixture of good and bad, of burning dedication and grubby exploitation. Despised by some, misunderstood by most, it is the ultimate Underground scene. Tony Cummings investigates...