It isn't right to lay hands on a law enforcement officer. They are keyed up and well aware of the hatred most of the public has for them. They don't know if she had a weapon. Where the fuck are their guns and tazers and mace??? Here in the states he would be lucky if he got tazed.
Armed response only deals with armed people/bomb threats. Police will use tasers, but it is frowned upon by the public because shit like this always seems to happen.
If someone is causing shit in a public area in London you will be taken down immediately. Met police don't fuck around.
Are you one of the people who ignores the overwhelming body of evidence that shows how blacks are much more likely to use violence against police? Of course there is racism in the police force but I would say most of the time it is warranted.
Just because it is commonplace, it doesn't make it right.
UK police are generally quite friendly and won't use force unless it is completely necessary. I was once picked up with a friend at 2am walking home from a party. He must have known we were carrying weed because there is no way he couldn't smell it. I was also carrying acid, which made me freak out because it is a class A drug and I might have received more than a caution. He just dropped us off at home.
This pretty much sums up our police force.