Hedvig Opshaug of Northern Light, before A Show, London, September 2015.
The Gucci dress styled for the cooler months... over flared pants/jeans.  See Hedvig's more summery looks here and here. 
Recreate Hedvig's look (kind of):
Gucci floral-print dress
Paige Denim Bell Canyon High Rise suede flare pants, or Alice + Olivia suede flare pants