Fine white tipped fungi, black at the base, growing very upright and not very crowded.The rotting log may have been beech or sycamore. They were 3-5cm in height.
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.
The correct latin is Xylaria hypoxylon. Xylaria hypoxylon var longipes is now Xylaria longipes. The latter is like a Dead Man's Finger and usually grows on dead Sycamore logs.
Lat/Lng: 51.6, -0.6
OS grid ref: SU9799