Such things can be said in UK cause the citizens are not armed...
a—not true. Rifles and shotguns are legal. Handguns and assault rifles are not. .22 air rifles and pistols are legal.
b—the British public was never a gunowning populace. The highest amount of legal handguns, rifles, shotguns was 1.5m in 1996. Given that like myself owners owned multiple guns, the amount of Brits who owned a gun would have been half a million, maybe slightly more, maybe less.
Your average Brit is more likely to own a collection of knives and samurai swords.