Patch of greyish, crustose lichen on trunk of deciduous tree. Lumpy apothecia with discs clearly visible. Possibly Pertusaria hymenea.
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.
Lat/Lng: 52.1307, -4.0579
OS grid ref: SN592500