Grey, areolate crustose lichen growing on concrete post. Black lecideine apothecia. Some margin rims of apothecia paler. Possibly Lecidella stigmatea.
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.
Thank you for help with identification. Much appreciated.
Lat/Lng: 52.3, -0.2
OS grid ref: TL2469