By arse covering and not being defined areas its a boy called wolf.
Most folk just ignore them.
NON PARTICIPATING AIRCREW ARE STRONGLY ADVISED TO REMAIN CLEAR OF AREA
Sounds to me like they want to shut down all traffic.
But they couldn't actually do a manditory because they would be hit in hours by a compensation bill.
And under scottish law I don't think they have even covered one cheek in the arse covering deptment.