In the village of Waterfoot on the outskirts of Glasgow, a lady in her thirties is explaining to her local Conservative MP, Paul Masterton, why he has her vote. It can’t exactly be described as complimentary. ‘We were talking about this the other night. Corbyn’s an absolute clown and Nicola’s just horrific so… I don’t want to say the best of a bad bunch…’ Masterton chips in before things get awkward: ‘Don’t worry.