A stemmed bracket fungus growing low on a decaying trunk.
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.
R. Phillips' book shows the Dryad's Saddle as having a quite dark and scaly upper surface. Is it very variable?
It is normally darker than your photo shows but it can be much lighter than the Phillips example.
How big was it?
Lat/Lng: 51.3452, 0.0755
OS grid ref: TQ446627