Tiny fungus on a fallen tree.
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.
Mycena adscendens is characterised by its granular cap and slight swelling at the base of the stalk. Neither of these are visible on your photo but I still think this is the most likely.
Lat/Lng: 55.01284, -1.60504
OS grid ref: NZ253687