Well.....if England had actually been invaded, they might be a little more pragmatic about such things- but then the English have always been a generally law-abiding lot.
The farther East you go, the more, uh.....flexible......the attitude of the proletariat becomes as regard to dicta of their "governments." Add to that the fact that those peoples are often under threat of invasion, civil disorder, religious genocide, and famine.
My daughters old boyfriend was from Hungary and said that it was very common for homesteads in the countryside to have secret stashes of forbidden weaponry up to and including belt fed and shoulder-fired weapons. Additionally, you could easily get just about anything on the black market if you knew a guy who knew a guy.
According to him, unless you actually shot someone, the cops would usually just steal any discovered contraband, or forget about it for a small fee.
Another good friend of mine grew up in Istanbul, Turkey. The government there only cares about protecting the regime, and doesn't really consider shotguns and pistols a great threat so they are generally somewhat legal, or at least not a huge deal if you are caught packing when you shouldn't- also with a small donation to the cops.
His Dad is technically disabled, and thus prohibited from owning firearms. The local cops have confiscated his guns three times and never actually served him with any paperwork.
Now, if they catch you with a centerfire rifle, THAT is a big no-no that will get you disappeared quick.