Main picture Crustose lichen with some Foliose lichen at the right hand side
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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Hi Bear, the brown crustose lichen is a Verrucaria, probably Verrucaria nigrescens. The small whitish foliose ones are probably Physcia adscendens (P. tenella is similar but usually found on trees and wood).
The yellow crustose ones are either Caloplaca or Candelariella - need to test with K to tell.
Lat/Lng: 53.6, -0.5
OS grid ref: TA0113