Just had a lovely us airways rep (well trained, professional) book me on hba-mel-dxb-lhr-jfk(dest)-txl(stopover)-lhr-dxb-mel-hba. Qf and ba F, ab J (to berlin).
Couldn't find any syd-lhr options but mel-lhr is just as good for us Tassie folk.
What was the total cost (miles and cash)? Well done!