I agree with "STRATA" why on earth would you go to Birmingham ?
Its transit facilities are mediocre, interline connections are also poor , local roads are appalling, and the City itself is well to be honest dismal, its hardly a magnet for tourism so there is no incetive for inward traffic (sorry).
I just cannot see the argument for this ?
Put capacity where demand ALREADY exists whether that be the South East or infact ........Manchester !
It ALREADY has TWICE the capaciity available NOW that Birmingham could only offer on a "what if", basis.
It has fantastic domestic and European connections, with multiple daily flights to all major US cities. With the recent massive expansion via the Middle East it can at least demonstrate considerable outbound demand. It's also massively poplular as an inbound destination with a host of major attractions.
Airlines, Business and indeed passengers vote with their feet, the only two players in town are Heathrow and Manchester.
I have suggested before build a new airport AKA O'Hare 6/8 runways
and close Luton Stansted, Heathrow Gatwick, City, Southend etc etc.
...will not happen !