aberfan afan valley afon llwyd ammanford bridgend bristol channel british steel canal cardiff cardiff central railway station cardiff queen street railway station carmarthenshire coal coal mining corus group culture of wales cyfarthfa ironworks cynon valley disaster ebbw river ebbw vale economy english language european union far east free market glamorgan gloucestershire government great britain heavy industry history of wales industrial revolution iron keir hardie light industry list of welsh principal areas by population margaret thatcher member of parliament merthyr tydfil midlands monmouthshire national coal board newport ogmore vale pastoralism popularity port primary school rhondda rhymney valley river cynon river ely river garw river llynfi river loughor river taff river tawe river usk rugby union rural sirhowy valley south wales south wales main line south wales coalfield south west england stagecoach group steel swansea swansea bay swansea valley thatcherism tower colliery town unemployment united kingdom vale of glamorgan vale of neath wales welsh language west wales world war i world war ii wye valley