Hi,
on The Ampleforth you have used the key 'dhm_id' (https://wiki.openstreetmap.org/wiki/Key:dhm_id). This is a reference intended to be used for windmills as a key to find the windmill on a specific site. Typo maybe?
After a little bit of looking around I cam by 'fhrs:id' (https://wiki.openstreetmap.org/wiki/Key:fhrs:id). Might this be what is needed?

As a side note: The website link was not working, I managed to find another one and have updated.