white foliose lichen with raised crusty looking middle on trunk of lombardy poplar tree
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.
That description would fit the observation - thank you
Lat/Lng: 51.6151, -1.1129
OS grid ref: SU615910
Beside Thames Path near Benson marina