It's actually originally an English law, however as it became more and more of a nanny state, taking away people's rights and wanting absolute socialised government control, you're now just left to fend for yourselves with erm, a phone call to 999, whilst the actual criminals are laughing at the fact they'll just get a slap on hand for helping themselves.
Or you know, we can defend are self upto and including using lethal force.
It just has to be reasonable force, shooting someone in the backlash they run away isn't deemed reasonable.