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What should you do when you have a royal encounter? There are no set rules for meeting the monarch, but if you wish to stick to tradition, there is a standard protocol. Do you know what's adequate? Test your knowledge with this quiz!
ADVERTISEMENTUS President Donald Trump is currently on his first visit to the United Kingdom as head of state and he is set to meet Queen Elizabeth on Friday the 13th at Windsor Castle.
Mr Trump is not known for sticking to protocol but experts say "he'll want to impress".
What should he do to make a good impression? Test your knowledge below!