I seem to remember that the Bruntingthorpe based Victor became airborne whilst doing a fast taxi a few years back. Plenty of eye witness's, video and camera records of the incident and the CAA investigated.
Outcome - I believe a minor reprimand which seems like common sense prevailing.
A precedent maybe for the Vulcan investigation, or is that too much to hope for?
After all, its been done before without incident as the aircraft is capable of doing it without stressing itself to the point of destruction even though it has the highest airframe hours of Vulcan ever built. And no, it was not displaying at the time, so it is said.