Lichen on a mature Plane tree, east facing.
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.
Many thanks for the i.d I shall have to take some closer and more clearer photographs of this and others to see if this aids id.
Lat/Lng: 52.1731, -1.5439
OS grid ref: SP312528
South Warwickshire, east facing trunk of tree.