.....and Revenue_Melb...what's the point of that? Great fly to Perth from elsewhere. Change terminal. Change carrier. Fly to London Gatwick on a LCC. Get off. Change aircraft. Fly
backwards to wherever you wanted to go in Europe. Or just jump on one of the ME3 and you are there in 1 stop. That's why no one answered you. It doesn't make any sense.
Qf is looking at tapping into a market which is Central/Western Oz (+whoever doesn't want to go via Dxb due to whatever reason) to London - 1 stop. Not elsewhere. London and South East England/Wales.
Also like the other posters have said. How the hell does it cost 25m to glass off a gate and put in two customs windows for departure (like other airports mentioned and also Hamburg comes to mind) and a similar separated corridor for arrivals?!! Ah well greater minds and all that.
Cheese