The Ryan base at BHX will not get anyone moving to CVT. If there was any chance of someone doing that it would have been Ryanair. Baby and Flybe are both happy at BHX. It's not in BHX's interest to do a deal that would lose as much as it would gain.
CVT should do something soon. Even the appeal won't help them. If they win it, they will only go back into the planning system. By the time they get there BHX will have all it's planning in place and CVT's needs for a larger terminal will look even less likely.