Charles took part in 372 public engagements last year, even after stepping aside for almost three months because of cancer treatment, according to data compiled by The Times of London newspaper. That made him the second-busiest royal behind his sister, Princes Anne, who had 474 engagements.

The 76-year-old sovereign was diagnosed with an undisclosed form of cancer in February 2024, less than 18 months after becoming the king upon the death of his mother Queen Elizabeth II.