On Silver Birch, and I am thinking Hoof Fungus, Fomes fomentarius, but the underside is saying I am wrong..?
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.
Lat/Lng: 53.2199, -0.6116
OS grid ref: SK927701