I predict a riot..... I predict a r.i.o.t....
In the UK at least - the days of big, uncontrolled riots are finished.
Teenagers are too busy watching the stuff kick off on their tablets to bother getting their hair messed up by a water cannon

And the 21-35 age group who would in the past had a genuine grievance / issue to riot about - well they are usually smart enough to know that they will never change the course of things in this country any more......it's not like the 70's or the 80's.
Besides, the cops / authorities have too many tricks and too much training - and most importantly, too many sophisticated tools and weapons to let anything even remotely kick off these days. The 2011 riots were hardly "riots" in any sense - especially when compared to the riots of say 1981 around London.