If I buy the version from amazon in the USA, will it work in England?
Yes, it works anywhere.
There is no European publisher currently (Stardock has talked to pretty much all of them for the past year or so, and none of them wanted to take it on), but they planned to revisit some of them after game launched, so hopefully now the publishers will see how well it's doing and change their minds.
Otherwise, you can order directly from Stardock to get the CE box shipped and get the download along with it. Importing from other online retailers won't get you the CE.
