Trees covered in a variety of diffrent lichen but mainly fruticose types.
Caution: Do NOT use iSpot to identify fungi to eat!
Some fungi are very poisonous so a mistaken ID could have serious consequences.
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While I can see that the lichens in the later photos are well branched, thin and rounded, the first photo shows what may be a different species (as you suggest is possible) - definitely thicker and more flattened lobes. My first guess would be one of the Ramalinas, but it would be worth having a closer look before making any decisions.
Lat/Lng: 50.159057793041, -5.0281226634979
OS grid ref: SW838331
On the footpath on the side of Carrick Roads below the castle at st Mawes .