With 2 airports competing heavily for airlines attention here, I cant see how the airports are sustainable, and given this reality I cant see where the money is going to come from to reinvest in the future, its as simple as that. BFS has done quite a bit to improve the place over the last few years and yes there are some empty units, but with passenger number quite down over the peak years and customers spending less and looking for greater value on fewer shopping occassion this further compounds the problem.
Don't let BFS fool you, they make a lot of money, even the years after the downturn. I think the portion of the revenue that they put into reinvestment in the building is ever-dwindling so that the group revenues are not hurt by Cardiff and Luton's struggles.