Originally Posted by
JonWB
No - The fare rules state no stopovers (or I believe transfers), so I think it has to be one flight number LHR-SYD and one flight number SYD-LHR.
On Qantas.com the fare sale explicitly states that a stopover is allowed in each direction and will price accordingly. For a LHR-SIN stop SIN-SYD-LHR route it adds 13 quid to the fare in J.