This lichen was not the subject of the photos where it appears. It was on the corners of some photos of a Peltigera and I apologize for the bad quality. When I looked into these I came across what seemed like it could be a lichen, but for a long time I did not find anything like that. More recently, casually, browsing through the pages of Irish lichens came across a photograph that I think is of the species that was looking for.