At least ten Greenpeace activists have been arrested after blocking the entrance to BP's headquarters in central London.

Footage shows activists being removed from the entrance to the building in St James's Square by police officers on May 20.

''Protesters had been camped outside the HQ in boxes, where they intended to stay at least a week. As footage shows, these had been broken into, presumably by police, by the end of the first day,'' the filmer said.