really though its investment..remember...build it and they will come...
They did come....and then they left. bmi baby, Globespan, Ryanair, Wizzair.....
They didn't leave because of ILS issues and they weren't forced out by Peel. They left because passenger volume x seat yield less costs was not adequate.
In the right economic environment, in the future, that may change. At the moment, there are less risky bets to take than airports like MME.