Grey 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.
Yes, definitely a Physcia, and fruiting, but a closer view with good definition is needed for identification. Personally, I won't speculate in this instance.
Thank you Alan, for your comments.
Lat/Lng: 55.0166, -1.542
OS grid ref: NZ293692
Mixed woodland within The Rising Sun Country Park, Wallsend, Tyne and Wear.