Thank God the Brits have such tight gun control laws........
Even if you can erect a society where criminals and thieves can't acquire firearms-or it's too costly for them to do so-it won't help protect innocent civilians.
In fact, it will just increase the power disparity, because confrontations between ordinary citizens trying to protect themselves and aggressors will come down to the application of brute force.
Someone who makes his living through violence is going to be a lot better at it than his victim. People in South Africa and the UK are in much more danger than people living in a country where you are at least on equal footing with your attacker.