Re: "Britain's FBI"
State laws is something that I found really odd although I guess you could say that as Scotland has it's own legal system and some of it's own laws the situation here isn't that different, just not as fractured. Then again, the distance from London to Edinburgh is far less than the drive across most states in the USA!
Oddly enough you could get caught out just crossing our invisible England/Scotland border as Scotland has extremely low drink drive limits so you're legal on one side, then bam - breaking the law once you pass that "Welcome to Scotland" sign.