So the SNP in the Commons is considering a policy of “disengagement” from day-to-day parliamentary activities, following its dispute with the speaker Sir Lindsay Hoyle. You could argue that, like their fellow nationalists in Northern Ireland, they shouldn’t take part at Westminster anyway, since the SNP’s overarching aim is to break up the UK. Plus, to the majority of Scots, not having to witness toe-curling performances of SNP MPs in the Commons on a regular basis would be an added bonus. Win-win all round. Martin Redfern.