The UK will be atleast a week or so behind the US date. But folk are unsure due to some parts shortages which is why the release dates keep moving out...

Yep. We're still waiting for the last parts to come in. Still keeping our fingers crossed that they'll get here next Friday April 28. There are other threads on this that get into intense and boring detail.
Here's two now! scratchlive.net - scratchlive.net

But if there's a UK dealer who got his/her order placed early enough (i.e., before this first run sold out), then they'll have one a handful of days after all the parts arrive here. But it may be that such a unit is already sold to whoever came in willing to special order it.

*mouth watering*

asking around it seems like june. if you know of anything sooner let me know. maybe there's a list of the uk suppliers who have ordered from this first 'wave'????? that would help.