I think both your whites are male southern small whites but I go for heath fritillary for all the frits (I did wonder about Provençal for the first one...). I still find
Mellicta a very difficult genus, especially from photos, but
athalia (heath) is particularly variable and I can't see anything to suggest they are not that. I think knapweed fritillary can be ruled out, both from the uppersides and from the undersides where these are visible. I understand why Phil suggested that, looking at the books, but in real life knapweed (though also extremely variable) is quite distinct and characteristic. The underside hindwing is also spotty near the base - sometimes a useful and easy thing to look for:
Guy
