Butterfly/moth ID

[MillipedeFan]

Hello, I found this blue and white insect with black spots on the underside of the wings in London, UK. I think it might be a common blue butterfly, but I’m not sure. Here are some pictures :

 

[IntermittentSygnal]

That’s beautiful

 

[The Snark]

Lycaenidae, probably Polyommatinae sub family. Lepidoptera experts often have trouble narrowing it down to genus, let alone species. Consulte the local entomologists where it was found.

 

[corydalis]

Celastrina argiolus - Holly Blue female

 

[MillipedeFan]

Thanks so much everybody! I let it go today.