Yep...the Green Party leader was in the news for being arrested in some protest or other...rather than being elected, now I think about it.
/pedant
Jenny Jones isn't the green leader, she's a London Assembly member. Natalie Bennett is the leader. (It's also not Caroline Lucas, who used to be the leader and is their only MP). The Greens seem to change leader a lot, and didn't officially have a leader at all until a few years ago.