The King spoke of his "shock" at being diagnosed with cancer as he met fellow patients on his return to public-facing duties.Charles candidly described the experience of being told he had the disease when he visited University College Hospital Macmillan Cancer Centre in central London to learn about the latest treatments and chat to staff providing the pioneering care.He also reassured those who asked about the state of his health, saying: "I'm well."

The King spoke of his "shock" at being diagnosed with cancer as he met fellow patients on his return to public-facing duties.Charles candidly described the experience of being told he had the disease when he visited University College Hospital Macmillan Cancer Centre in central London to learn about the latest treatments and chat to staff providing the pioneering care.He also reassured those who asked about the state of his health, saying: "I'm well."