There is a fundamental problem that laws only affect the law-abiding, which seems to have escaped a number of people's attention.
I'm surprised that there isn't a bigger issue with gun crime, bearing in mind how porous our borders seem to be when it comes to drugs. The average street criminal might have to make do with a Webley he bought in the pub, but I'm sure that any of the Eastern European gangs have no problem obtaining as many automatic weapons as they need.
Andy