It's only a few weeks since Greenpeace activists scaled famous statues across London as part of a protest against air pollution, but they've already strapped into their harnesses again – this time to climb up the columns at the British Museum. The activists are calling on the museum to drop BP as a sponsor of its latest exhibition, Sunken Cities. The exhibition is about underwater archaeology and preservation, making oil giants BP a slightly odd choice of sponsor. The demonstration kicked off at around 9.30am this morning, and police were called shortly after. The museum has been evacuated and is temporarily closed at the moment.
See more pictures from the protest: