Caloplaca cerinella with Intralichen christainsenii - Distinctive by being a corticolous lichen with more than 8 spores in the ascus
Scoliciosporum umbrinum - multi-septate curved spores are distinctive. Not many lichen grow directly on metal.
Anaptychia ciliaris - Looks like a giant physcia
Candelaria concolor - A tiny yellow corraloid lichen inhabiting tree trunks
Xanthoria polycarpa - Small thallus lobes separate it from the commoner Xanthoria parietina
Pertusaria hymenea - with single lecanorine like apothecia
Phlyctis argena - white smooth cracked thallus, infertile with greenish soredia. K+ yellow turning red
Parmelina pastillifera - C+ red medulla with bun shaped isidia
Thelopsis rubella - Found on very old trees on wet rain tracks on the trunks
Evernia prunastri - Grey on upper side, white on underside, net like ridges and antler shaped lobes.
Lecanora barkmaniana - Rare to see it with apothecia
Lecanographa lyncea - Easily recognised when familiar with it.