So we end up with all the visually polluting windfarms which destroy our lovely hills and countryside while their advocates make a fortune??
Restriction zones are political and a waste of time other than keeping law abiding citizans away.
I can remember flying in a Citation 5 Ultra in an airway which touched the 20 mile restriction zone put around London in the days following 9/11.
We were climbing through 20,000 feet and had kit which could literally put us into the front door of Parliament.
Had we been of such intent it would have taken us from turning 3 minutes max to get there.
For public consumption only springs to mind
Pace