SARAH YOUNG and MICHAEL HOLDEN A member of the British royal family's household has left her role after making "unacceptable and deeply regrettable" comments about race and nationality to a woman at a grand reception at Buckingham Palace, a spokesperson said. Ngozi Fulani, who was born in Britain and works for a domestic abuse support group, wrote on Twitter that the royal aide had repeatedly asked her: "What part of Africa are you from?" when she attended an event hosted by King Charles's wife Camilla, the queen consort, on Tuesday. "We take this incident extremely seriously and have investigated immediately…