We can already see autumn tones beginning to creep into the new-in sections of our favourite brands and one colour that's easy to start styling now is purple. Deep aubergine and royal purple shades are set to be huge next season and one of the Duchess of Edinburgh's favourite summer dresses falls somewhere between the two.
Sophie was first seen wearing it at a joint engagement with Prince William in 2023 and it's by British clothing brand, Erdem. The Roisin dress is midi-length and the ruffles on the shoulders provide a hint of coverage rather than it being totally sleeveless.
