Grey-white lobes with 'burnt' margins and black, soredia-like specks.
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.
Unfortunately it is a bit immature or under-developed and not showing its soredia properly. I suspect it is H. afrorevoluta, but not developed enough for an ID.
Many thanks Alan. It's nice to know that I was struggling with good reason!
Lat/Lng: 53.659, -2.5011
OS grid ref: SD669181