The Diplomatic Corps Reception is arguably the most highly anticipated annual event on the royal calendar. The white-tie affair is one of the few times during the year the ladies in the family don the spectacular royal jewels — and Queen Camilla sparkled in the late Queen Elizabeth II’s rarely seen Aquamarine Ribbon Tiara

Prince William and his wife Kate will greet Qatar's emir, Sheikh Tamim bin Hamad Al Thani, and his wife on Tuesday as they begin a two-day state visit to Britain. The visit marks the return of Kate to formal welcoming duties after she missed the Japanese emperor and his wife in June while she was undergoing preventative chemotherapy for cancer.

But Queen Camilla still has a lingering chest infection and will miss the start, while Catherine's involvement in the visit by the wealthy Gulf state marks another step in her ret

The Princess of Wales may have been largely absent from the public eye this year but each time she has made an appearance, she has sent a distinct fashion message with her choice of outfit, from the upcycled Jenny Packham shift dress she wore for Trooping the Colour in June to the ‘All England Club’ purple frock she donned at Wimbledon.