on an exposed dry stone wall, northern snowdonia
Caution: Do NOT use iSpot to identify fungi to eat!
Some fungi are very poisonous so a mistaken ID could have serious consequences.
No interactions present.
The yellow-green species is indeed R. geographicum, and if you put that up as the ID, others of us could agree with it.
I doubt the other is R. hochstetteri - the extensive orange staining from iron oxide deposition is unlikely in this species. Could be Lecidea lithophila, as in your related observation.
Lat/Lng: 53.13787, -3.86256
OS grid ref: SH755616