grey green bushy 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.
Could this be Pulmaria sulcata. It has very leafy leaves.
No, its neither Parmelia sulcata nor a Pulmonaria (you've slightly muddled the names in your comment).
Did you notice (or can you go back and check) whether the lobes are the same colour on both surfaces or whether they are paler on the under side?
Evernia prunastri and Ramalina farinacea are very similar but Evernia has lobes that are usually whitish beneath.
It is lighter underneath. So it is proably Evernia prunastri
If this is positively identified as Evernia Prunastri then it is a foliose lichen and not Fruticose
Lat/Lng: 52.0, -0.9
OS grid ref: SP7840