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.

After being hospitalised for side effects from his cancer treatment, King Charles has been urged to reduce his royal workload. Despite concerns, the 76-year-old monarch swiftly resumed public duties.