Two different lichens on branches of same tree (Ash)
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.
There is a link to a simple lichen identification key in the Fungi and Lichen forum which will help you either confirm or correct your initial identification of Xanthoria polycarpa (Cushion Xanthoria)
To compare the two species here are links to photos of Xanthoria parietina:
and Xanthoria polycarpa:
Thank you Jenny
Lat/Lng: 51.9462, -1.37167
OS grid ref: SP432277