Invited to an A list wedding- need an outfit!

[Alsogoingtogetslated]

I’ve been invited to a very high profile wedding. I had planned to lose 2 stone to fit into my outfit.
I didn’t.
So now I have a few weeks to find a stunning outfit (online) but my searching just keeps pulling up the same old shops- Reiss, Karen Millen, SHEIN/boo hoo etc. I’ve looked at needle and thread, Nancy max, the OUTNET.
What great websites can I look at to find-
Budget up to around £500
i suit red/cobalt blue/deep pink/green- jewel colours
I suit jumpsuits/ midi and maxi dresses/high necks if they are high cowl/structured, one shouldered and halterneck things and wide leg trousers and blazers
I like structured clothes but it doesn’t have to be
I don’t suit short dresses or anything wafty or round necks or pastel colours.
I'm size 16, fairly big boobed.

Bonus points if you can find me something!

Highly recommend Scarlett & Jo for stunning wedding guest dresses x

For reference I’m a UK24 // 5ft 4ins

@jellywtbelly I‘m really not sure that Scarlett and Jo would be the best choice for an OP who wears a size 16 and has specifically said she likes structured clothes and doesn’t want anything ‘wafty’.

But I could be wrong, of course!

@MarciaSaysANumber maybe not but it was just options x I don’t believe everything I showed was wafty but perhaps that’s just me. I don’t know what OP being a 16 has to do with it though as they do a size 16

Phase 8 have some really good options in other than just midi dresses, there’s maxi and jumpsuit. Plus they seem to be in the gem stone colours you prefer with higher necks

https://www.phase-eight.com/clothing/dresses/occasion/#sp=%5Bsessionstorage%5D