Help me find this dress - coord set floral white yellow green

[Lost2010]

A few years ago at the BST in Hyde Park 2018 I saw a woman in a very elegant what I thought was a dress. Floral dress - white yellow green. Cap sleeves I think.

Came back and Googled it. Lo behold found it. Was a designer Skirt / top combo. £££. Admired it. There was a mini dress in the same fabric. Floaty and ethereal.

I think it was a designer with a name starting with M but 5½ years on I could be mistaken.

Just thought of it yesterday and can’t remember the name of the designer. It will now bother me for days till I figure it out.

So the wise folk of MH please help.

Thank you.

Just from the description of the style - could it have been Marchesa/Marchesa Notte?

No definitely not that. The designers which is sorta on the tip of my tongue is first name last name.

Mary Katrantzou? From the look of her S/S 2018 runway collection, there could have been something like you describe in the ready to wear:

Spring Summer 2018 (marykatrantzou.com)

@HolidayAtNight thanks. It is actually Isabel Marant. Got confused with the last name