Quite a few patches of this up there.
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.
Usually, one would expect a red-fruited Cladonia of this general appearance to be C. diversa, which this might well be, but I cannot make out confirmatory characters.
However, this being on the Cairnwell, other species have to be considered. The 4th photo includes what looks like a non-fruiting podetium of C. bellidiflora, whch also has red fruits, and at the left a couple of non-fruiting podetia that may be C. borealis but a bit out of focus.
A shame that we don't have a side view of the fruiting podetia that form the main subject. I have a feeling that they are C. borealis, but cannot tell. I have added agreement to "Cladonia".
Sigh, I had intended to spend time on the Cairnwell myself, but am still out of action for medical reasons.
I'm not likely to be back up there any time soon so I suspect this probably needs to remain identified only to genus level then.
Lat/Lng: 56.8942, -3.4297
OS grid ref: NO130790