Grey-green, warty, crustose lichen growing on fruit tree trunk. Several dark apothecia spots on each wart. Possibly Pertusaria pertusa.
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.
Thanks for help with the identification.
Lat/Lng: 50.6751, -3.5874
OS grid ref: SX879873