This was found on blackthorn I think
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.
I think this is 'Lecanora campestris' more usually found on rocks.
Thanks for the comments a link to http://www.lichens.lastdragon.org/Lecanora_campestris.html
Seems a bit different around the edges and colour of apothecia is also different- brown
With Best Wishes
Lat/Lng: 52.1, -3.4
OS grid ref: SO0451