Grey brown lichen growing on a wooden park bench close to the river.
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.
It could be Physconia enteroxantha (from following the ispot lichen key. (Can I permalink to a species result?)).
It looks like Physconia Grisea as seen here
Lat/Lng: 52.1976, 0.1175
OS grid ref: TL448575
Sheeps Green on a park bench.