There were two major UK productions. The first (West End) run featured many of the original Broadway cast (who are also in the film) and was amazing. A couple of years later a new version toured, starring Adam Rickitt as Mark, which also ended up in the West End - another good production.
If you're buying the DVD, I recommend the Zone 1 (US) version as it's a 2-disc set containing loads of superb extras (including documentaries and interviews with the writer/composer who tragically died just before it opened). These are not on the Zone 2 (Europe) edition!