Well, if you made the barrel and stock longer, you could still have the gun. The ban just related to the size, probably for concealment. I would expect more incidents because the population has grown, gun ownership has grown, and attitudes in society/culture forever changes.
We used to wander the fields with air rifles, air pistols, and a shotgun. Never had a problem and we never caused a problem. Culture is changing for the worse because of all the immigrants from shit hole countries. Plus, politicians know for a fact they would be shot if any ole nut job was allowed a gun.
Are there gun ranges etc.. in London