grey/green colour foliose lichen
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.
Not fungus but lichen.
There are several different species, the foliose one in the centre is Parmotrema perlatum, greenish foliose below is a Flavoparmelia, probably F. caperata.
Upper right the brown apothecia (jam tart-like fruiting bodies) are probably Lecanora chlarotera.
Below the Parmotrema the black dots on the light greenish-grey background are probably Lecidella elaeochroma.
Thank you, the foliose in the centre of the image is the one I tried to describe. I have now edited the title and also deleted other image and will take a closer shot next time for easier identification.
Lat/Lng: 51.6, -4.1
OS grid ref: SS5798