What does EU supplied mean exactly?
It means it's an import

Basically that means you have only 2 years warranty with VW UK, and not the usual 3 years you'd get with a UK supplied car.
Definitely check out the Pre Delivery Inspection stamp and date - your warranty will expire 2 years after the PDI date
Also check it has a spacesaver sparewheel (and not a puncture repair kit)
Other things to check are the internal alarm, 8 working speakers (check out the rear ones), English manuals and service books.
Don't get me wrong, there's nowt wrong with a good EU import - I'm on my third

.... just be aware of what to check out and the difference in warranty.