Yellow underneath, hairy and white on the top.
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.
Yellow underneath but yellow pores or smooth yellow hymenium?
fluffly white pores on top, smooth and yellow underneath.
Now it has developed a bit more it looks like it might well be a Stereum.
Lat/Lng: 51.7, -2.8
OS grid ref: SO4610