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.
Please forgive me for taking this back to genus level, but I don't think the photo is clear enough to confirm the species - eg are there soredia or isidia on the branches?
I have also struggled to photograph Usnea species well enough to show these fine details.
Examining the base for blackening is also a good first step towards arriving at a species.
Lat/Lng: 56.0, -4.9
OS grid ref: NS2391