"Water Cannon are illegal in the UK, so it is very stupid to call for their use."
Well change the law then.
This is now absolutely nothing to do with Black peoples issues it is the anarchist left using a situation to further their aims: To bring down the Government and the Country and install a Marxist leader.
Bring out the water canons and lob a load of soap at them. Looks like most need a good wash.
I'm not overly keen on the rubber bullets thing but better than real bullets and if the Police are under a life threat from a mob then I see no reason not to eomply them as a last resort.
These people need to understand that apart from a few Metropolitan elite lefties no one is behind them, their violence and their vandalism.