The Welsh Government has welcomed the Prime Minister's commitment to electrifying the Valley Lines but a spokesman says it must be linked to the unfinished electrification of the main line from London to Swansea:
Full electrification of both the Valleys and Great Western Line to Swansea is essential if we are to give Wales a rail network that is a genuine alternative for commuters, leisure travellers and businesses.
We are pleased the Prime Minister now recognises benefits that electrification will bring to Wales. We will continue to work with the Department for Transport to reach agreement on the business cases for electrifying the Valley Lines and for continuing electrification of the Great Western Main Line onwards from Cardiff to Swansea.
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