Is it time for Labour to give up on the Union?

Is Labour finished in Scotland? There has been an assumption by many, particularly those in England, that the SNP behemoth will start to roll back at some stage; being in government in Holyrood will inevitably cause political gravity to take hold. Yet the SNP’s political humbling seems more remote than ever before, with a large gain in Westminster seats in December combining with huge polling leads for both themselves in Holyrood elections and for their side of the independence question itself.