Far from certain if my suggestion is correct so any suggestions will be great, thanks. Found on wooden fence.
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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I have looked at my other upload (second on the carousel above) which you kindly identified as H.physodes and I would have never of thought they were the same species - think I better just give up!
but then H. physodes is wonderfully variable. The marginal lobes give it away here, but the centre of the thallus is a confusing mess of warty lobules and the blackened cortex doesn't help (I have seen similarly but more extremely blackened H. tubulosa - presumably a sign of exposure, stress or general ill health).
You'll struggle to give up: lichens are addictive.
Lat/Lng: 53.7189, -0.5031
OS grid ref: SE988257