Black lichen found on stone wall
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.
Umbilicaria polyphylla is a foliose lichen and your specimen looks crustose.
Lat/Lng: 55.426833333333, -2.7705
OS grid ref: NT513150