Righto - I am almost POSITIVE I requested upgrades to Business class during the last QF "oh you havent bought an upgradeable fare but hey do you want to play the upgrade lottery anyway" promo. However on manage my booking it seems to think I only requested Premium economy for the Sin-LHR flight. I am fairly sure I did Business with a premium economy request if Business was not successful.
Could someone please check the loads in Business for me on QF9 on the 18th of May? I suspect Business is heavily booked so they have pre-empted my upgrade request with a "Computer says No". Mind you I have very little expectation of it even happening due to being a NB.