Anonymous activists are holding a march in London against “austerity, the infringement of rights, mass surveillance, war crimes and corrupt politicians.” British police have announced a series of restrictions on the event, limiting it to a three-hour period on a prescribed route between Trafalgar Square and Whitehall. The Anonymous movement has gathered every November 5 since 2012, to coincide with the annual British tradition of Bonfire Night, which began when a group of dissident Catholic plotters tried to blow up the British parliament in 1605.