What's for tea
As a representative of the people of Germany, you have been asked to join the royal tea after the ceremony.
Hopefully, there'll be a suitably cosmopolitan range of snacks on offer, and maybe something new that's been created for the occasion. Coronation chicken was a great success last time. Perhaps a recipe this time that pays tribute to the fact that both Charles and Camilla are on their second marriage: what about "divorce duck"?
But will there really be enough to eat? Even if you think you might get hungry during the ceremony, don't take any emergency sandwiches with you. The best thing to do is have a big breakfast before you set out. And don't forget to practise drinking your tea with your little finger (your "pinkie") pointing straight up in the air. Nobody does this any more, but it will gain you respect and show everyone that you have good old-fashioned standards.