Ringwayman,
Would suggest outside of the runway expansion not a lot. Any uptake of routes would surely be only minimal, I posted on your good airports thread this reads nothing more to me than the government trying to push people in the M40 corridor and North London toward BHX rather than being reliant on the South Easts airports. For it to work the airlines would have to brought into the concept, something I'm just not sure will happen, why leave the tried and tested for the 'doom and gloom' as Mickeyman puts it. To be fair the last few pages of this thread does suggest BHX is the airport equivalent of the Liverpool football team.....