Pre Delivery Inspection, done at the supplying dealer. If its an import it should stand out. My mk4 was an import and didn't come with anything other than the service book. But it did come with leather recaro's, climate and an electric sunroof, a combination of options which weren't available on a UK spec car at the time.
Check that it comes with a uk spec alarm and speakers in the back.
Nothing wrong with an import, make sure its registered with VW UK so you're notified of any recalls.