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

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.