We’re not disarmed. Only hand-guns are banned. Shotguns aren’t. Europe has firearms.
Unfortunately each and every weapon in Britain is registered with the police and require a certificate from the police. A registration list is a confiscation list. Just ask the Australians.
In addition with rare exceptions the public only has shotguns and that is on a need to possess basis such as farmers and hunting clubs. AR-15 or AR-10 verses a shotgun, unless up close, the rifle wins every time. The only unregistered weapons are in the hands of violent criminals.
I must add that Britain has a very low rate of murder. It is not due to the harsh gun laws, but the culture of the people in Britain. I lived in Berkshire for 3 years in the 70s when I was working in the North Sea. I have many fond memories of Britain and return every couple of years to visit friends.