Hi there
With regard to a new base, the simple answer, as I see it, is Why Bother? There are loads of airfields, large and small, a lot of which are not operating at full capacity, not to mention the many private airfields that are adequate for short-term use.If a major accident ever occurs, that might require a lot of ramp space for medevacs,etc, there are enough existing ramps and barracks to cope with any amount of helicopters and airlifters.I could see the new AC helis spending more time overnighting on Army property rather than always returning to Baldonnel.It really doesn't take much to keep a heli operating in the field and it wouldn't be much of a stretch to see a heli based at the Curragh.
regards
GttC