Lichen not sure which type, maybe fruticose?
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.
If you want to get it to species have a look at
Wildlife of Assynt
I am sure it is a Cladonia sp.
Lat/Lng: 53.7, -1.7
OS grid ref: SE2026