HI
I am not conversant with the plans for Redhill but by being around a bit we know that:
Stansted, Luton, Heathrow, Birmingham are all in the market for extra runway capacity for the big stuff.
Oxford, Cambridge, Biggin are all marketing for business traffic.
Am sure that Manston and Lydd would jump at the chance of growing and attracting business.
Am sure that there will be an upturn in traffic again once we hit the next growth spurt. But even allowing for that I can not see the need/logic for a further development at Redhill.
Probably missing something.
FD