The label: High-end high street store Whistles is known for effortless style at affordable prices, making it perfect for Kate's daytime engagements. It's particularly good for outerwear, simple silk dresses, high-quality fabrics, and great separates.
The outfits: Whilst Pippa favours the label's separates, the Duchess of Cambridge prefers to look to Whistles for knee-length dresses with waist detail, pleated skirts, and longer sleeve lengths. Both sisters own (or did they share?) a zip-up beige jacket.
Read More British FashionRoyal FamilyCelebrity FashionDuchess Of CambridgePippa MiddletonKate Middleton