I have been looking for the airfares from Melbourne to London and found that the Royal Brunei price is quite good at the moment.
For example, MEL – LHR – MEL is $1,370.5 return for 27.07 – 27.10 or
MEL – LHR – MEL is $1,432.12 return for 27.08 – 27.10 (where I need to travel).
The flights are 26 h 40 mins for MEL - LHR and 26 h 00 mins for LHR – MEL.
Other dates are available as well.
Somehow, it is cheaper to book this airfare thought the website in the link rather than though the airline official webpage.
Hope this might help somebody.