Originally Posted by Traveloguy
Remember that non WTP BA sectors except on SYD/MEL-BKK/SIN-LHR sectors only earn 25% miles, so where possible, I would be going WTP on BA.
According to the fare rules document, QF flights are booked into B and BA/IB/AY/EI European flights are booked into Y so you're earning full miles and SCs all the way, plus the BA/QF mileage bonuses.