Polyommatus ripartii agenjoi -Agenjo's Anomalous Blue
Having spent years waiting for an opportunity, I was lucky enough to encounter a second of the Anomalous Blue species at the site I visited in Huesca in August 2016 and take some butterfly photographs
It was a smaller sized species than I had imagined.
I have been tempted to place these under the name of fabressei, but agenjoi I currently believe to be the correct possibility. Either way, the lack or weakness of the white hindwing underside flash separates it from ripartii.