Last year, the Boss of Virgin Atlantic in Australia mentioned the possibility of twice daily flights to/from Sydney. Do you think this new flight will also be via Hong Kong? I hope so.
I cannot see a second SYD coming soon or a service to MEL either. I would certainly welcome MEL but cannot see it paying with 3ish aircraft required to run it...

I can see VS taking BA's approach and concentrating on Asia/US and hopefully South America to provide a higher aircraft yield...
