So all these little micros on the back of road signs have permission from the council do they, or the ones on railways platforms have permission from Network Rail? All the ones on farmland have permission from the farmer? ...Who probably isn't even the landowner, just a tenant. I'm aware of caches in old mines and canal tunnels, now I know that there is no way permission would be granted for those.
The answer is shockingly NO ! I would hazard a guess that 95% of geocaches are placed without permission or knowledge of the landowner.
Some serious double standards going on here. Modern thinking I suppose, everything all wrapped in cotton wool, no risks allowed, everything wheelchair accessible and bring the brats along as well.
Oh for the good old days of letterboxing.