Yellow lichen found on stone wall, made up of lots of small "dots"
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.
Caloplaca microthallina is a maritime species growing on sheltered coastal rocks. Your given location doesn't look very coastal, so you could consider some other Caloplaca or a Candelariella. Look at the crustose species in Jenny's lichens Jenny's. http://www.irishlichens.ie/index.html
And check the descriptions in Alan's site, http://www.lichens.lastdragon.org/
However, without close examination, and some chemical tests, this may have to remain a 'yellow crustose lichen'.
Lat/Lng: 55.426666666667, -2.7706666666667
OS grid ref: NT513150