SomeoneElse
The north bit of https://www.openstreetmap.org/way/18010413 , north of the bridge (which isn't a ford) is not a public road, it's a public bridleway.  Foot, horse and cycle access is legal, others are not defined.  You could perhaps argue for motorcar=destination on the access to Sutherland Lodge, but there's clear signage on the northern bit of the bridleway that says no motor vehicles.  I'll update it when I map today's GPS traces.