In the wake of his bbc interview. And new hope as scientists try to save britains ash trees from being virtually wiped out by a fungal disease thats swept europe. And coming up in the sport in the next half an hour on bbc news the english and european rugby champions saracens will not challenge their 35 point deduction and £5 million fine for breaking the salary cap. Good evening and welcome to the bbc news at six. Hundreds of Anti Government protestors are trapped inside a university in hong kong as a stand off with police intensifies. Some have managed to escape under a volley of rubber bullets and tear gas. Police have surrounded the campus for a week now and its thought up to 500 are still inside, some armed with petrol bombs. The past week has seen some of the most violent protests since they began injune in response to plans to allow some criminal suspects to be extradited to mainland china. Critics feared it could undermine the territorys freedoms. Those plans were withdrawn in