What could this have been??

[Jeff N]

I live in the Mt Druitt area of western Sydney.

Of an evening, several commuter aircraft pass over my house en route from(presumably) the Hunter Valley region heading towards Bankstown.

On Tuesday night of this week, around 10pm to 11pmish, a reasonably large jet aircraft flew over quite low on this same flight path.

It sounded different to any other jet aircraft that I know of, and also had two very bright wingtip lights blinking in a wig-wag fashion.

I didn't get outside until it had already just passed overhead.

Anybody got any clues as to it's identity??