Thank you all for your assistance and apologies for not responding sooner - away for weekend!! I am embarrased now at having, perhaps, wrongly identified the second butterfly as a female blue!!
![Embarassed :oops:](./images/smilies/icon_redface.gif)
I didn't particularly notice that is was discernably smallerl than what now transpires was a female common blue and I wasn't aware that there were any Brown Argus at this particular site - Dawlish Warren Nature Reserve in Devon. Attahced is the best that I have of the underside of this particular individual.
Cheers,
Sylvia