Was it any good? My Dad is an instructor for the red letter day things at bruntingthorpe aerodrome and does some work for pro-drive and he says they tend to just let you get on with it. My bro went on an aston martin day there for his birthday last year and the instructor was almost begging him to give it proper beans, letting him get the back end out n all that stuff. Got a dvd from inside both a db9 and v8 vantage, looked like a right good laugh.
Think it must vary on what company is running the event and what circuit its on, I would hate to spend all that money just to turn up and be told I have gotta stick to like 4000 rpm and 100mph or something