Dark grey-green foliose lichen growing on sycamore trunk. Rhizines on lower surface. Possible white-green soralia near centre of spreading lobes.
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.
Thank you for the identification and helpful comment. Shall experiment in order to try and improve the overall focus in future images.
Lat/Lng: 52.0, -0.1
OS grid ref: TL3337