text: I think this section is done now.  The bit from Rake Cottage northwest is signed on the ground, as is where it leaves the road in Glaisdale: https://www.openstreetmap.org/note/1786863 .  Someone's filled in both sides, and I've filled in a small gap in https://www.openstreetmap.org/changeset/112924285 .  All route markers west of Rake Cottage and between Grosmont and Sleights are in the relation too, and many of the ones in the middle are as well: https://www.openstreetmap.org/relation/6361532#map=14/54.4449/-0.7680 .