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 think this is definitely a foliose lichen, it's so 'leafy'. It's probably some form of evernia - prunastri I'd suggest. Was it growing on trees or wood of some kind? Excellent little guides to lichens are available from the Field Studies Council.
on a sycamore tree in a lightly wooded area of a fairly open and exposed cemetery
The magic of nature is all around us - we just need to learn how to see it.
Lat/Lng: 53.8475, -3.02
OS grid ref: SD329395