When is it justifiable to break the law? When it’s for the good of the planet? When it's morally justified? We meet two people who broke the law for their beliefs and find out just how far they are prepared to go.   The first is Tamsin Osmond, one of 5 environmental protesters from organisation "Plane Stupid" to have been arrested for climbing on top of the Houses of Parliament with a banner to protest against the building of the new runway at Heathrow. Tamsin sees herself as a modern day suffragette resisting authority for the greater good but is she actually prepared to sacrifice her freedom for her beliefs? We film the run up and aftermath of her trial.