Knee-length yellow pleated cotton shirt dress cinched at the waist with an attached bow and featuring a full skirt, cap sleeves, shirt collar, belt loops and button fastening through the front. It is by Jaeger.
This is a very summery and unpretentious dress that seems very comfortable. It may lack a bit of elegance for an official royal visit.
1- The Duchess of Cambridge wore it on 17th September 2012 in Honiara, Solomon Islands.