gpserror
I believe it is currently correctly mapped as far as I can tell, though the renderer is not best depicting it due to hierarchy.  The master relation, https://www.openstreetmap.org/relation/13317479 , contains the relation for the Jockey Hollow Area along with three other pieces of MNHP, but the other pieces seem to be more prominent as they are not relations themselves...  With this bit of digging I hope some fellow mappers would give their opinion.