The CAA have taken (rightly IMHO) a hard-nosed stance with regard to large/high performance aircraft. For example, when BAe apprentices refurbished the Vulcan at Woodford and then asked the CAA for a permit to fly it on the civil register, they were turned down on the grounds that the CAA engineers were not involved from the beginning.. .. .The CAA have decided that no big/high performance ac will be given a permit to fly unless they have manufacturers support. This is why the Vulcan at Bruntingthorpe may succeed; the CAA are in on the ground floor. Indeed, the CAA multi test pilot has been there to take part in the taxy demos, and to meet the team and to see what they are doing.. .. .These big jets are not for amateur hands - they are very complex and do need manufacturers support. But you must look at it from the CAA's point of view. They are ones who give the clearance to fly/display - if a display turns to rat!!!!!, who are going to be held responsible?. .. .And no, I am not CAA; I am an ex-mil multi pilot who understands what display flying means.