Samantha Cameron's label Cefinn offers versatile wardrobe staples for the modern woman, such as this navy voile midi dress. It's crafted with a fitted bodice that's made with a black-trimmed centre seam and gentle gathers along the waistline, then falls into a pleated midi skirt that's finished with black piping and a wrap-around waist tie. Style it with kitten heels and a boxy bag to emulate the label's sophisticated aesthetic.