Another difference is the fact that it has buttons all down the front. But other key factors—the denim, the long sleeves, the collar and the relaxed fit—all match Old Navy’s shirt dress.

Victoria Starmer's dress collection is pretty impressive. The wife of Keir Starmer wore a floral maxi dress from Karen Millen, a Reiss pleated navy dress and white Hobbs dress to Trooping The Colour.