Pink, placodioid lichen growing on siliceous rock. Small,darker patches of soredia. All thalli shown growing on same rock. Possibly Trapelia placodioides.
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.
Didn't spot the immature cephalodium until I read your notes above. (Think I was focused on the striking delta-shaped placodioid lobes.)
Thanks for help.
Lat/Lng: 53.1116, -3.9062
OS grid ref: SH725588