This is The Guardian.

Today, the green surge in London.

It's a chilly morning in early April, and inside a former spice warehouse in south-east London, excitement is building.

We're in the friendly place for the launch of the Green Party's local election campaign.

It is a very Green Party kind of venue, not just the cutesy name, but the artful

no frills vibes. Bare brick walls, peeling plaster, exposed beams.

Good morning, thank you very much. It's amazing to be here in Deptford.

Zach Polanski bounds onto the stage with a big toothy grin.

It's been a remarkable moment for the Green Party.

We have tripled our membership.

We've tripled our poll ratings.

He says he is confident that his party is heading for its best ever set of results.

And we are heading for a new record-breaking result for the Green Party.

And it's in Labour London, where the Greens particularly fancy their chances.

We're going to have a bright green, hopeful London.

According to one poll, half of all Londoners attempted to vote for the Green Party next Thursday,

with four Labour councils looking within Polanski's reach.

I think Labour are going to be white, actually. That's the honest answer. I think Labour are going to be white, actually.

That's the honest answer.

I think they're going to be virtually wiped out.

And I think there's going to be quite a few green-controlled councils.

Boyed by Hannah Spencer's win in the Gorton and Denton bi-election,

...