In the recent past there have been a number of people very critical of the police crowd control tactic called containment, many call it kettling. The tactic is used to prevent small groups of protesters splitting off from the main protest and causing damage in the surrounding areas.
Today we have seen why the police defend their right to use this tactic. The main student protest was around Westminster, Whitehall and Parliament Square but a number of protesters split off and moved up to the Oxford Street where they caused a great deal of damage and attacked the Prince of Wales and the Duchess of Cornwall who were in a car in the area.
The people who claim that kettling has no place in public order policing need to explain what the police should do to prevent violence and vandalism spreading through the streets of London when the organisers of protests lose control. It seems that just asking nicely doesn't work.
Tory activists anger at 'loon slur'
7 minutes ago