Charles III has received 7,000 letters of support since the announcement of his cancer. Under treatment, the British monarch withdrew from his official duties.

The king had the opportunity to read some of these letters and cards, selected and placed in the king's "red box", this famous red briefcase which is used to transmit confidential documents and notes to the monarch. "Stay positive and don't let this drag you down. Trust me, the treatment works, but the most important thing is family," wrote one letter.