Originally Posted by
number_6
Technically BA is responsible for the interlining of your bags, so you need to complain to BA that your F fare resulted in mishandled baggage. BA should offer some compensation (never mind that it is a QF problem, the wacky airline rules make it a BA problem). With a paid F fare, baggage problems are taken somewhat seriously and you'll get some compensation from it if you present your case well.
BA has no responsibility on whether Qantas elects to check bags from a QF booking to a QF booking
If QF had checked the bags through QF would have been responsible for the bags ( albeit that if they failed to arrive at destination that it would be handled by BA )
With 2 separate bookings it is definitely just down to policy and there is no entitlement to baggage checking so I can see zero chance that BA would compensate for it