I'm English. He's mostly wrong, and when he's right, it's through luck more than judgement.
Water Cannon would not have helped as they are indiscriminate and, at the times he says they should have been used, not everybody out there was a looter or rioter. In the later days when the probability was higher that anyone out was there to create trouble, the problem was dealt with through adequate policing.
The correct level of policing was used eventually and it did the job. Cracking heads CRS-style doesn't help, as the French riots proved four years ago. Arming the police also doesn't work, either. Do the US get fewer riots than us?
Again, knee-jerk politics are the absolute wrong answer. We should be more like Norway and less like Bush-era US in our reaction.
Also, characterising the rioters as welfare-collecting drug-addicts not only shows his agenda, but creates a loose foundation on which to build his arguments as arrest demographics show a wide cross-section of people were involved.
No, anyone coming up with authoritarian solutions to this is just helping a right-wing government sneak through more extreme policies that do not in any way serve the general public. This is what governments do if we let them, much like the previous government's civil liberty restrictions.
What we should do is stand back and let level heads prevail. Don't arm the police with baton rounds and water cannon without readin about their devastating effect on innocent children in Northern Ireland, for instance.