Very small. On rotten stump.
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.
No idea which one as rather a hard group and not much information on them but you could put it on as Myxomycetes
Lat/Lng: 51.59451, 0.28433
OS grid ref: TQ583908