In the UK, it's almost impossible to legally own anything other than a shotgun, and even then there are serious restrictions. For example, a shotgun is allowed to hold a maximum of three cartridges at any one time. If the capacity is higher, it requires a Firearms Licence, which is much more difficult to get than an SL.
The vast majority of Replica Firearms are illegal to own unless one can prove to be an Actor etc who needs one as a prop.
Britain has some of the most draconian firearms legislation in the world. Strangely, this does not prevent members of Organised Crime Groups shooting each other and, much more importantly, civilians, on a regular basis. Difficult though it is for politicians to understand, if a criminal is willing to risk a life sentence to commit murder,
he won't much care that the murder weapon itself is illegal.
Of course, one positive aspect of the UK's gun laws is that school shootings almost never happen.
Our children have to knife each other to death instead.