Soft whitish fungus on a fallen 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.
Its usually a pinky orange colour but the edges and perhaps the younger bits can be white might be worth keeping an eye on it to see if it starts looking more like
Lat/Lng: 51.2599, 0.2232
OS grid ref: TQ552535