Originally Posted by thadocta
It could always carry two registrations. (Remember the BA Concorde which also carried an 'N' regitration for when it operated the domestic US flights under the Braniff code?)...
Concorde also was painted in Braniff colours on one side (and had to be flown by Braniff flight crew on the US leg). SQ also had a "codeshared" Concorde briefly (painted in SQ colours but not sure if it ever had SQ crew or registration). The problem with the LHR-SIN route via Concorde is that it couldn't fly supersonic over much of the route and was only an hour or 2 faster than regular flights.
As for VS, they are desperately short of aircraft (made worse by the A380 delays) and couldn't spare even 1 aircraft for this route. But I suppose VS could buy and operate new aircraft and lease it to the Australian holding company.