Two lichens growing on limestone rock.
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Some fungi are very poisonous so a mistaken ID could have serious consequences.
No interactions present.
The grey fruticose lichen is a Ramalina, but I can't see details clearly enough to be certain which. Ramalina siliquosa is the most frequent on coastal rocks but Ramalina cuspidata is very similar.
Ramalina siliquosa details and photos with link to R. cuspidata:
The orange lichen in your second photo looks more like Xanthoria aureola. In most reference books you will find it under its old name of Xanthoria ectaneoides.
Details and photo's:
Lat/Lng: 50.583215, -1.273591
OS grid ref: SZ515761
Growing in dramatic location on limestone rocks on the cliffs of the Cripple Path on the road between St. Lawrence and Niton, Isle of Wight