Greenish grey foliose lichen. Small. Twig in photo about 5mm. Diameter.
Covered in fruiting bodies. Brown discs with thallus -coloured outer ring.
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.
I can't see any markings that could be pseudocyphellae. No white spots or lines. Could it be Physcia stellaris ?
are just barely visible as a mottling on the lobes - more subtle in P. aipolia than the coarse cracks in the cortex of Parmelia spp., though more pronounced when damp.
I agree with Ian that the other blue-green foliose sp. is a Parmelia.
Lat/Lng: 57.4952, -4.0789
OS grid ref: NH754469
Willow by roadside.