but the key question is why "in situ".
Why? Because in case you havn't realised, this is a website for mine exploraration. The main reason this site was built, and the reason this site exists, is because most of the people on here explore mines, to look at what remains.
What would be the point in this hobby, and this website, if there was nothing left in the mines to look at?
I do realise the raison d'etre of the site.
"AditNow is an information sharing resource and discussion forum for the mine exploration community as well as industrial archaeologists, researchers, historians and anybody with an interest in mine exploration or mining history. The site provides a searchable database of mines and quarries from across the UK, comprehensive information and thousands of mining photographs and documents."
And I will take this opportunity of saying I believe the members achieve this aim brilliantly. If I have given the impression that I think all artifacts should be removed and mines stripped then I have expressed myself very poorly. I think in general artifacts should be left well alone but as others have mentioned there does exist a grey area. If an artifact of historical interest is under threat either by the vagaries of nature or, probably more importantly, of the human race, then perhaps it may be better to remove, renovate if necessary, and place it in a mine, town or county museum. That way at least the mining history will be preserved. I'm still thinking about the concept of removing something to stop it being removed!
The past is a foreign country: they do things differently there.