The Greens are having quite a moment. Since the anointing of Zack Polanski as leader of the party, there’s been a 45 per cent increase in the membership, which is now up to about a hundred thousand believers. The party is also doing very well, comparatively speaking, in opinion polling, reaching about 15 per cent, not very far behind the Tories.

The Polanski surge has come courtesy of a Corbyn-esque policy blitz

But while the Greens are keen to talk up their polling success and growing membership – which is, naturally, good for party coffers – it won’t necessarily correlate to wider electoral success. We’ve been here before: during Jeremy Corbyn’s leadership of Labour, the membership peaked at a modern high of about half a million. And we know how that ended.

The Polanski surge has come

See Full Page