Crikey, this got a bit heated in places!
I truly appreciate all points of view/ideas, and everyone who's taken time to post.
Weekend got hectic, so still working my way through links etc. Will get proper opportunity this evening and update you.
A few more quick answers to PPs' questions and a recap:
Greek Orthodox church ceremony, in London.
Bride, groom and both families are traditionalists, hence me putting any personal feelings about 'imposed female modesty' aside and respecting their guidance on dress etiquette.
(I checked re head coverings, btw: not necessary for this wedding. Phew!)
I did consider choosing the (sleeved) Sandrine dress, but thought the (sleeveless) Zadie would be more versatile in years to come.
I'm not hugely blessed in the bust department, but enough to mean the dress sits further up than on model pics. Wider shoulders too. So not revealing cleavage per se, but I suppose covering up that area also wise.
Very good point PP made re bra. Was thinking of an invisible low back bra converter, if anyone has experience?
(Otherwise, judicious use of tape?)
@AndyMcFlurry Have been reading up on the customs. Interesting. The symbolic stamping on groom's foot by bride, to reject notions of his dominance!
@nancy75 If only OneHundredStars could further reduce their sales prices to under £40...
<wishful sigh>
@SageRosemary Away from home, so can't take pics, but my beaded gold clutch bag's similar to the type in pic but with a clip frame fastening (mine was a charity shop find, from over 12 years ago).
My other bag is this satin envelope clutch.
https://www.swankyswans.co.uk/products/chantel-beautiful-satin-envelope-clutch-bag-teal
Very simple. But far more greenish/teal than I remembered and not blue enough for the dress?
I think you're right: gold bag and heels best.
@PegasusReturns
"OP do you have a fashion icon? What would she wear?"
Stevie Nicks does Greek Orthodox wedding...now, there's a wonderful thought!
Finally, thanks for the comedy on this thread
"I was trying to sneak it past the MN Guild of Pashmina Police and Blazer Enforcers"
and warnings not to whip off t-shirts in church have made me smile!