I spent a year living in Bristol. Bristol was my move back into a city after a couple of years in Devon. I found Devon spectacularly beautiful. I ran workshops, swam in rivers, took acting classes. Finally, I left. Didn't look back.
The reason you can't wander into a gun shop and buy a gun, unless you have a licence, is because the thing is a lethal weapon, and in the wrong hands will kill. So why can anyone walk in off the street and buy gas equipment, boilers, valves the lot?