The Home Secretary has made the wrong decision in not allowing the Metropolitan Police the use of water cannon. Not only are water cannon a better alternative to rubber bullets, they act as a powerful visual deterrent to violence.
Another crowd control alternative is now required and I suggest the Met adopt Sound Cannon. They are low cost, safe, extremely mobile, and would be very effective at dispersing a riot or violent demonstrations. Though I hope another riot never happens we must be prepared to protect Londoners against all eventualities.