What was the source of the wikidata item?  It just looks like bot-created garbage: https://www.wikidata.org/w/index.php?title=Q24661403&action=history .
The locality in OSM is also rubbish; it looks like the source is OS OpenData and it's actually the name of the adjacent farm, not a separate locality.
The alleged castle site (which "people on the Internet" claim probably isn't one) is apparently what OSM has as "Flat Cop" to the north.