Formed in a disc like shape this appears to be Golden Shield Lichen (Xanthoria parietina). It was about 7 foot up a tree facing the east catching the early morning sun. With over-lapping green and yellow wavy leaf-like lobes.
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.
... but given the yellow/grey colour, lobe size and apothecia I don't see what else it could be.
Lat/Lng: 53.645, -1.785
OS grid ref: SE143165
Taken in local park. Too high up the tree to get a good picture. I am not entirely sure if this is one group of lichen or two close together.