Useless snippet - I was queueing to get on a 400 on my way to Sydney, not long after Qantas had run a non-stop LHR-SYD demo flight to get lots of publicity. I started talking to the guy next to me, who worked with Shell. He said that the fuel for the Qantas flight was specially made in Germany and trucked over to London for the flight. Apparently it had a higher energy density, or something like that.