You're right JEM, that display at Duxford was really something. I do some part-time work there and was lucky enough to be in on the day of the rehearsal. It certainly emptied the offices and all the resident pilots were very impressed. So much so that an Ozzie ex 747 captain chum of mine just couldn't work out how it was done and tried to persuade his company to let him try it in the sim but they didn't bite. I subsequently saw Air NZ do a similar routine at an Ardmore airshow in a 747 named "Frodo" after a character in a film which had just been made there.