Measured 10cm approx. Purple in colour, round in shape, growing on branch of a live tree.
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.
Happening to look at this again, I am in very little doubt that this is D. cyanoloma. It can be a magnificent lichen.
Lat/Lng: 56.4868, -5.3912
OS grid ref: NM913378
on the forest trail up to Beinn Lora