This is the “Sophia” Viscontibloom navy and burgundy silk-crepe shift dress with white, blue and pink floral print. It has a back vent is fully lined and has a concealed zip fastening along the back. It is by the Canadian designer Erdem.
This is a nice enough dress without being spectacular.
1- The Duchess of Cambridge wore this dress on 22nd April 2013 to visit to the Willows Primary School in Wythenshawe, Manchester when she was pregnant with Prince George.