Confidence: I'm as sure as I can be.
Notes: ID refers to the second photograph, with the rounded thallus with brown apothecia (fruiting bodies) [not black as in Tephromela atra]. (N.B. the name "Lecanora atra" has not been in use for many years). Probably not helpful to include photographs of other things in the same 'observation' as it messes up the ID system, but photograph 1 shows the orange alga, Trentepohlia, and the lichen in photograph 3 is a Lepraria, probably L. lobificans.