Sophie, the Duchess of Edinburgh dropped into a deep curtsy when she met the Emperor of Japan as her trip abroad with Prince Edward began. See the photo.

LONDON — Do bow or curtsy, just a little. Don’t hug the monarch. At the banquet, tear your bread roll instead of sawing at it. Don’t clink glasses; raising them will suffice. As President Donald Trump ...

The rules of etiquette surrounding the British royal family, such as bows, curtsies, and subtle gestures, have once again come under scrutiny, as two recent incidents are compared with an older but ...