Is it a common blue?

Is it a common blue?

Observation - Is it a common blue?. Description: A pair of mating butterflies a few summers back on Benbecula in the Western Isles. Not good at all with invertabrates but Common Blue seems likely. Let me know otherwise.

A pair of mating butterflies a few summers back on Benbecula in the Western Isles. Not good at all with invertabrates but Common Blue seems likely. Let me know otherwise.