I found this growing and wondered whatever it was, research in my book shows it is likely to be this fungi, a member of the myxomycete family.
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.
Lat/Lng: 50.4, -4.8
OS grid ref: SX0469