Is Labour now a threat to the Greens?

It's been a turbulent year for the Green Party.

In May 2014 they had close to 18,000 members but 12 months later that number had soared to 60,000 - it became known as the "Green surge".

But despite increasing their vote four-fold in the 2015 general election and picking up more than one million votes, they only won one seat, holding onto Brighton Pavilion where Caroline Lucas is the MP.

Now lurking on the left-wing of British politics is something new - a Labour party led by Jeremy Corbyn - and as the Green's leader, Natalie Bennett, noted during her autumn conference speech many are wondering if it's crowding the Green Party's space.