colour black on old oak 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.
Could it be Daldenia concentrica commonly known as King Alfred's Cakes or coal fungus, used as tinder for lighting fires?
Yep... though I've never tried to light one!
I lit one to see how it would go in my smoker (beekeeper). It 'fuffed' a bit at first but became a good ember and gave off a fair bit of smoke.
Lat/Lng: 52.9704, -3.168
OS grid ref: SJ216420