By Sean Coughlan, at University College London Hospital, BBC Royal correspondent King Charles spoke to patients about the "shock" of hearing a cancer diagnosis - as he returned to public engagements with a hospital visit. The King was asked by a patient how he was feeling while he had his own cancer treatment: "I'm all right, thanks. Not too bad," the King replied. Looking relaxed and smiling, the King visited a specialist cancer centre in central London with Queen Camilla. It was his first big