Originally Posted by
Prophead
Because the airport is now serving the UK rather than the south east.
Yes, it's the two assumptions implicit in that comment that I'm struggling with:
a) that a significant additional number of domestic destinations will be served by a 3-runway Heathrow, and
b) that the traffic on any new domestic routes will contain sufficient additional connecting passengers to make any international routes viable that aren't already being served.
I've not seen any stats or forecasts that demonstrate either of those conclusively.