The Duchess of Cambridge paid another touching style tribute to her late mother-in-law when she attended the Commonwealth Day service on Monday 14 March.
Arriving at Westminster Abbey with Prince William and Prince Harry, she wore a grey Erdem coat and a complementing wide-brimmed hat by John Boyd.
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According to The Telegraph, 90-year-old designer Boyd was one of Diana's favourite milliners, but is not thought to have designed a hat for the Duchess of Cambridge before.