Airports with in / out bound inbalance
Whenever stats are quoted for airports, a return trip is always measured twice, the assumption being that outbound passengers have got to come back somehow.
How many cases are there where people are actually flying back from different airports, and could this be a potential problem for UK airports? Consider:
* A typical long haul passenger may now be asked to pay £82+ in APD to leave blighty. Simple way to avoid this - get an open jaw routing with outbound to UK - over-burdening our border staff who don't seem to be able to cope. Surface (+ tunnel) or low cost it to the continent and return from CDG, AMS etc, paying PSC and local taxes, both considerably less than LHR there.
*Pilgrim routes such as to Santiago De Compoestella must place an extra loading on outbounds.
* Migration routes.