Hi Andy, I think node/5349980733 should be in the partial route relation (relation/7336319) instead of the superroute.

Thanks - yes it should. I've moved it.
That's now 3 C2C markers I've found so far - relation/7336319 - and one of those was drawn in permanent marker on a gatepost!

Since the C2C is an officially unmarked trail, that’s quite a lot :) I’ve seen some more hints towards the east on my several C2C attempts but I wouldn’t bet they’re still there.