Several independent protesting Self_motion groups , some of whom had moved Self_motion from the main march Social_event , assembled Come_together further north in the heart of London 's West End , where shops and banks were vandalised Theft and some individuals clashed Hostile_encounter with police .

They also fired Use_firearm on civilians , held Arrest many of their officers and their families hostage , vandalised Destroying property and looted Robbery valuables .