What Labour’s Rutherglen victory means for SNP and UK politics

Party's victory may point to a change in Scottish political alignments that spells danger for Humza Yousaf

Anas Sarwar, the Scottish Labour leader, had used the word earthquake" last week to foreshadow Labour's remarkable victory in Rutherglen and Hamilton West, where its winning margin of 30 percentage points exceeded even its predictions.

He did it cheekily, stealing one of the favourite lines often used by the former Scottish National party leader Alex Salmond when the nationalists were crushing Labour at repeated elections in the past. That theft of Salmond's phrase has additional resonance. It points to a change in Scottish political alignments that spells danger for the SNP and its current leader, Humza Yousaf.