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.
I agree with your identification of the first three photographs. If the dead wood is sycamore it is more likely to be Xylaria longipes. The specimens in the fourth photograph look slender like longipes but the wood does not seem to be sycamore.
Lat/Lng: 50.2, -5.3
OS grid ref: SW6645