ye i seen it in the UK, its pretty rare, been around for a decade or so, you just need to ask in the right circles. (gay clubs - lols!).
I dont think we will get much of a methamphetamine "problem" in the UK because the market is saturated with dirt cheap base amphetamine, and from my experience and what others have said, meth lasts WAY too long. The high is good, sure, but its shit 36 hours later after taking it and you're still awake.
The tabloids have been raving on for years and years about methamphetamine being the new thing and coming over to destroy our country, but it hasn't happened yet, i would guess that either a) the precursors are too hard to get here, or b) the dealers have decided its not worth it when they can probably make far more money from smashing out shit coke and base.