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Hi all,
just seen and got a quick shot of this female ? Purple hairstreak taken in full sun at 6:40 this evening. I cant decide is she an Ab form with Purple only on left wing ? Or is it just the angle of the sun on her not illuminating the purple on the right wing. She flew off before I could get any different angle shots. Any thought or confirmations welcome.

I would suspect its simply the angle playing tricks, much like when you only get purple on one wing with of a grounded Emperor. It can sometimes be really difficult the get the purple iridescence even if you have them at close range. Good context shot though

Many thanks indeed for your most informative reply, as with all walks of life one lives and learns,
Dave.