Very smooth and flat. Irregular dark spots are smooth but slightly raised rather than cup shaped.
Most examples no more than 2 or 3cm
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: 55.9493865, -3.164111
OS grid ref: NT273735
Basalt rock face. Facing due west.