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.
So this is a slime mould?
Yes. In its latter stages so it is possible to look at the internal structure and come up with an id. Something it is not possible to do when they are young and still developing.
Loads of photos here http://www.ispotnature.org/node/755231
THREE MARINE PROJECTS
Lat/Lng: 53.255, -1.052
OS grid ref: SK633735