Greenpeace protesters have blocked the entrances to BP's London headquarters in St. James's Square with specially designed containers. Activists have set up camp inside the containers whilst climbers abseiled from the top of the building. Greenpeace UK tweeted about the shutdown early on Monday morning saying, "This is a #ClimateEmergency". Report by Jonesia. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn