Thanks, Rod.
Id certainly got the impression from Pprune that every airfield was "manned". Good to see theres still some normal regular country airstrips
How does it work with manned fields? I'm still unsure why you cant land there after everyone has gone home. Is it a legal requirement?
Nigel, if a runway was being used for a purpose such as testing race cars, that would certainly render the runway unserviceable, and as such would be NOTAMmed for any certified/licensed aerodrome. If its a private aerodrome, they'd tell you when you called ahead for permission to land, and you'd plan accordingly.