Why do people think it's okay to keep trying to rob me?

[Pyrian]

Well, aren't you not allowed to own fire arms in the UK to begin with?

Yeah. Even the bobbies go around without firearms (unless specifically called for). But it's not just guns; in the U.K. simply hitting someone who's broken into your house could get you charged with assault if you can't prove that it was a proportionate response to a violent threat.

EDIT: Basically, I'm just trying to make the point that virtually any statement to the effect of "the law is X" is almost certainly relative to your location on these particular issues.