The problem flying her when she moved to Old Warden was, I believe the length of Old Warden's runway. They have since extended the runway however. It was transported to Old Warden by road when Hatfield closed. It now taxys around during some of Old Wardens displays which of course is great to see. The Shuttleworth Collection have expressed that they want to fly her again at some point. I don't know when that will happen though, It certainly wouldn't take them long to get her airborn again I doubt as she is in beautiful condition.
Yes it is one of the original comets. It is airworthy but hasn't flown in around 10 or so years which will change at some point because they said at a show that they plan to get her airborn again soon.