Scuffles broke out between campaigners and pro-Palestine activists at a march on Downing Street calling for more to be done to free Israeli hostages from Hamas.
Shouts of 'free free Palestine' from a small group caused huge disruption as the two sides clashed in the capital, which is facing its second day of protest following a chaotic rally on Saturday supporting Palestine Action.
One counter-demonstrator with gold teeth stuck his tongue out at the main group and appeared to make comments.
Police have removed a number of counter-demonstrators are threatened them with arrest.
Meanwhile, one man a man has reportedly been detained outside Downing Street after a protestor was grabbed by the throat.
