Four people have been arrested at an anti-asylum protest in London's Canary Wharf as a Met Police officer was punched in the face while young children were present. Police revealed they made three arrests for common assault by a protester on a member of the public, possession of class A & B drugs, assault on police/public order offences & failure to disperse following an anti-asylum protest on the Isle of Dogs this afternoon. The Met Police said some protestors, including some masked people,