I am thinking about booking a flight from LHR to Syd in Feb. As the trip is likely to be only for a week the thought of doing it all in economy is not appealing. I have enough points (with a small donation from my partner) to be able to request an upgrade (making sure I book into upgradeable fare code). I use seatcounter.com to check flight availability. But what are the QF upgrade codes to see if an upgrade from regular economy to businss is free? Any help would be greatly appreciated.