Arclite01:
I read that as close 30% and then rebuild it somewhere else...............
In other words, close one third of the estate & squeeze all the units into the other 2 thirds.
With respect to airfields there are already very few places one can fly to to conduct training. Fortunately the natives around the secret Oxfordshire airbase are very amenable to aircraft flying circuits, especially late at night for NVG training, so I'm told.