Dr. Wall said "This by-election was supposed to be about civil liberties.
"But it's been called by a man - David Davis - who thinks it's okay for the government to lock you up for four weeks without even telling you what you're supposed to have done.
"David Davis also believes that you should have no right to criticise the government within a mile of Parliament.
"He believes that if a child is being bullied for being gay, his school should not have a policy to protect him.
"And he believes that a judge should be allowed to kill you if he thinks you've committed a serious crime.
"So the Green Party had to stand. Someone had to stand up for civil liberties."
Poll Green behind the ears?