The chairman of the Green Party in Cheltenham has defected to the Labour Party.
Adam Van Coevorden has stood for the Green Party in two General Elections and seven local elections.
He's now resigned from the party - locally and nationally - to join Jeremy Corbyn's campaign.
The decision comes after he polled just 943 votes in last week's General Election.
On BBC Gloucestershire he said he believed the Green Party effectively shot themselves in the foot by talking about a progressive alliance and tactical voting.
We were already struggling. What we're finding is that our members in Cheltenham weren't even voting for us. So when you have a political party where your own members aren't voting for you they tell you they're going to vote tactically, they're going to vote Liberal Democrat, it's barely viable. A lot of members treat the Green Party as a pressure group, not as an electoral party."