Are coal miners in the UK labour conservative or liberal democrats
What an absurd question. Nobody is a Lib Dem anymore.
Its an absurd question because no one mines coal anymore.
Hence the decline of traditional center left parties like Labour in Europe....their natural base of support has gone away or been usurped by anti-EU parties which are more right wing than anything else.
To that end, I don't see how a party based on the labor movements of the early 20th century and the rise of an urban, industrial class with all of its associated political and economic needs can win consistently in the coming years in the absence of complete incompetence from the center right.