In 1954, there were only a dozen armed robberies in London but, by the 1990s-- after decades of ever tightening gun ownership restrictions-- there were more than a hundred times as many armed robberies.
Gun control zealots' choice of Britain for comparison with the United States has been wholly tendentious, not only because it ignored the history of the two countries, but also because it ignored other countries with stronger gun control laws than the United States, such as Russia, Brazil and Mexico. All of these countries have higher murder rates than the United States.
You could compare other sets of countries and get similar results. Gun ownership has been three times as high in Switzerland as in Germany, but the Swiss have had lower murder rates. Other countries with high rates of gun ownership and low murder rates include Israel, New Zealand, and Finland.
Guns are not the problem. People are the problem-- including people who are determined to push gun control laws, either in ignorance of the facts or in defiance of the facts.
There is innocent ignorance and there is invincible, dogmatic and self-righteous ignorance. Every tragic mass shooting seems to bring out examples of both among gun control advocates.
Some years back, there was a professor whose advocacy of gun control led him to produce a "study" that became so discredited that he resigned from his university. This column predicted at the time that this discredited study would continue to be cited by gun control advocates. But I had no idea that this would happen the very next week in the 9th Circuit Court of Appeals.