Caution: Do NOT use iSpot to identify fungi to eat!
Some fungi are very poisonous so a mistaken ID could have serious consequences.
No interactions present.
Just to be clear, it is the orange-yellow lichen that is Xanthoria parietina.
The more abundant grey lichen is almost certainly Physcia tenella, which commonly grows with Xanthoria spp. in areas of nitrogen enrichment, but the photo is from too far away to show this clearly.
Many thanks for this information, Alan - much appreciated!
Lat/Lng: 51.6, -0.2
OS grid ref: TQ2693