You can't trespass and go somewhere you shouldn't be and cry assault when you're forcibly removed. If Mark Field had tried to punch her, knee her, kick her, slam her on the ground and restrain her, then he would have been in the wrong. I sympathise with her cause, more should be done about the climate and I vote Green on local issues and I voted for Green in the MEP elections, I would vote for them on a national level if I thought they stood a chance of gaining a seat in my constituency. But the fact she is a woman has nothing to do with her actions, she wasn't supposed to be there, she was disrupting something and should have been stopped by security but instead was stopped by an MP. Just because he wasn't trained to act as a security guard is unimportant, if people always waited for a trained professional (Police, Paramedic etc) to be there in that exact moment in time then nothing would ever get done. If someone was bleeding, you wouldn't say to yourself 'best wait for the Paramedics to arrive'.