A question that should (perhaps) be included in the Wiki.
When you accept an upgrade offer from QR, are you rebooked into a revenue fare class?
I ask since POUG offers with BA go into award classes, though BAEC members do earn the enhanced tier points. It is unlikely that the higher class earns when crediting to BA partner airline frequent flyer programs. OTOH, UL upgrades from y -> J end up in I class and will credit to partners.
Happy wandering
Fred