Haven't done it myself, but have looked into it since I live part of the year in the UK. (Cambs)
Look through the past threads, talk to some of the UK members, make sure you understand all of the issues and ramifications of why some chose to import and why others chose to buy Euro models. There's also lots of talk about the process of what it took to import; I get the distinct impression that There Will Be Damage.
Among other things, remember that European market Airstreams are narrower and lighter and have different interior finishes. If you import a vintage unit, be sure you understand how you're going to have to get parts. Good luck!
"If you can't be a good example, then you'll just have to be a horrible warning." - Catherine Aird
Blog: 300 Miles or 3:00