A tree (elder!) covered in lichen. The detailed photo is a twig off of the tree. I Don't know wether the dark green species is a lichen or a moss.
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.
The bluish-grey lichen is a Physcia - either P. tenella or P. adscendens. The Xanthoria is X. parietina
The nitrogen-loving Xanthoria-Physcia community is now very common in lowland areas, and especially on Elder, which has a nitrogen-rich bark. Hypogymna would be unlikely in this situation.
Thank you both. Obviously my knowledge of lichen is very limited and I have only a relatively few pictures to go on, but at least I did make an attempt at identification. I will try to learn more. Cheers.
Lat/Lng: 53.5015, -1.7017
OS grid ref: SE198005