The Business Secretary, Vince Cable, said he was in favour of companies paying more than the minimum wage if they could afford it. But if wages are too high, it could lead to "significant loss of employment".
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PM spokesman's comments come following reports that the EU is secretly drawing up plans for greater military cooperation across the EU.
The Labour politicians put their alleged differences aside to jointly highlight how remaining in the EU could help fight climate change.
Late sunshine here and there this evening - but more cloud for southern Scotland, northern England and Northern Ireland again.