www.ukbutterflies.co.uk

This blue was sat in the middle of a large patch of trefoil in SW France last week.
Unfortunately, I did not get a sight of its underside which would have allowed me to ID with certainty. Hopefully, more experienced observers will be able to help.
Despite a good search the following days I didn’t see it again

If I'm not mistaken, that's a female Long-tailed Blue

You're not mistaken, Buggy!

Guy

Thank you both.