Mr Charles, who visited Germany about 40 times before becoming king, gave his dinner speech in German and English.
The queen’s coffin is due to be driven to Windsor, where she will be buried alongside her late husband, Prince Philip.
Flashed on Buhari’s face was a sense of dejection. If anyone should understand him, it was Justin Welby, the Archbishop of Canterbury.
A spokesperson for Prince Harry declined to say if the prince remained in England to celebrate her birthday.
“His Royal Highness passed away peacefully this morning at Windsor Castle.”
Buckingham Palace has confirmed the illness is not connected to the coronavirus.
