For example , the British Ambassador to the United States , Sir David Manning , was appointed a CMG when he worked for the British Foreign and Commonwealth Office ( FCO ) .
For example , the British Ambassador to the United States , Sir David Manning , was appointed a CMG when he worked for the British Foreign and Commonwealth Office ( FCO ) , and then after his appointment as British Ambassador to the United States , he was promoted to a Knight Commander ( KCMG ) .