Kate dazzles in Princess Diana's beloved diamond piece as Queen Letizia stuns at Buckingham Palace state banquet in honour of Spanish royal couple's first official UK visit

The Spanish royals were hosted by the Queen and Prince Philip, left together, the Duchess of Cambridge, Princes William and Harry, Prince Charles and Camilla, bottom right, with Britain treating them to the full pomp and pageantry traditionally rolled out for visiting heads of state. The Duchess of Cambridge was seen arriving first, top right, and looked resplendent in a dusky pink dress offset with her favourite pearl and diamond earrings. Kate donned the diamond and pearl Cambridge Lover's Knot tiara so beloved by William's late mother, Diana, Princess of Wales, inset. Queen Letizia, meanwhile, plumped for her country's national colour and stunned in a bejewelled red gown, which accentuated her curves. She also wore her husband's mother's tiara; the piece is called the Fleur de Lys Tiara or La Buena.