Several colors of foliose lichen
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.
Well I have had a look at your pictures and I would hazard a guess that the grey looking lichen is either Hypogymnea or Flavoparmelia and the yellow looking one could be Xanthoria...I am very new to this so it is really a guess, but I tried..
Hope this is useful
Conservation Student Cornwall
Lat/Lng: 53.7, -2.9
OS grid ref: SD4329