Foliose lichen. Observed on wooden bird table. Light green/grey. Growing horizontally.
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.
Look's like Stereacaulon versavianum but habitat does not fit.
Lat/Lng: 53.61591, -1.71053
OS grid ref: SE192133