Drive-in drive-bys!
Oh and I have no idea where to get a gun in the UK, but I could lay my hands on any class A drug you would care to name if I wanted, and I know of no-one who would know where to get an illegal firearm from, except for perhaps the odd unregistered farm shot-gun...
So there's not always a correlation between banning thing and them becoming easier to get, but that's just personal experience.