Black Lives Matter demonstration in central London. Footage taken at the barriers close to the Cenotaph shows objects being thrown at officers before two men were pushed back and hit with batons while they approached officers.Hundreds were also seen rushing up to a police blockade and some threw cans of beer at officers stationed by the Cenotaph as tensions flared up ahead of today’s Black Lives Matter rally.Police on horseback and with shields and helmets have arrived at the demonstration, and around 100 protesters have returned to the barrier of officers near the Cenotaph, chanting Lee Rigby's name and singing the national anthem.Sharing a video of demonstrators in Whitehall, London, Home Secretary Priti Patel tweeted: "(Thoroughly).