On a similar note - I will soon be flying LHR-SYD-LHR direct both ways on BA15 and coming back on BA7311 (QF metal).
I was thinking my NB QP would get me into the lounges at SIN/BKK either via QP or Partner Airline arrangement...
I've just now checked qantas.com & ba.com - and am not so sure! I'm not booked into a QF flight number, and the lounge appears to be wholly QF operated now?
Does anyone know either way?
J.