Aricia artaxerxes salmacis - Northern Brown Argus

Aricia-artaxerxes-salmacis-northern-brow | PTKbutterflies
Aricia-artaxerxes-salmacis-northern-brow | PTKbutterflies
Aricia-artaxerxes-salmacis-northern-brow | PTKbutterflies
Aricia-artaxerxes-salmacis-northern-brow | PTKbutterflies
Aricia-artaxerxes-salmacis-northern-brow | PTKbutterflies
Aricia-artaxerxes-salmacis-northern-brow | PTKbutterflies
Aricia-artaxerxes-salmacis-northern-brow | PTKbutterflies
Aricia-artaxerxes-salmacis-northern-brow | PTKbutterflies

This is the Northern subspecies of the Brown Argus (agestis) and flies in my region of England, hence the amount of butterfly photography portrayed here. 

It sports less orange lunule markings usually, but varies from almost unmarked to one which is difficult to separate from agestis. I am confident these are all salmacis.