The problem is that there are two types of visitor but only one price on the day !
Most of the regulars down there just want to call in for an hour or two, watch some movements, have a cup of tea, a chat and then go home , quite frankly they are not interested in the new infrastructure eg Concorde Tours etc.
The new facilities and improvements are aimed at the family day day tripper, the idly curious who think "lets go to Chester Zoo or Oulton Towers" and on "that" comparison it' is a cheap day out !
If they kept season tickets at reasonable prices (£60) that would solve the problem, but sadly rumours suggest these may be hiked by £30!
Rumours suggest that when the snack bar closes it will re-open in the cafe adjacent to Concorde but I guess realistically food prices will again need to go up again to meets costs of this as well.