Andy from the DWG here again.  We've just heard from the National Trust again.  Among other things they have said "The path is really just a short cut through steep and loose mountain habitat" and "blocking the path was a matter of disguising the route by rearranging stone and scree) it is not a genuine route".  I've therefore removed "highway=path" and left "disused:highway=path".  See https://osm.org/changeset/138626839 .  Strictly speaking, as noted previously, it's in access land and so is "foot=yes".  If anyone wants to improve the tagging of these things generally in OSM, please join the discussion at https://community.openstreetmap.org/t/rfc-highway-scramble/2496 .  If anyone believes that the NT description as "not really a path" is incorrect please take photographs - the ones that I have seen suggest an iffy scree slope (it's some years since I've been past either end in person).