Only found one example in the park, on the old stone base to the school railings.
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.
Unlikely as Lecidella elaeochroma is corticolous which means that it is found on bark.
When identifying lichens you have to check the habit details as there are many very similar species (specially the little dotty ones).
The chemical reactions to K and C are important as well as many crustose lichens can't be identified (even to genus) without them:
Lat/Lng: 53.9, -1.1
OS grid ref: SE5951