The Duke of Sussex says that he and his wife can never return to live in the United Kingdom. They will never again perform royal duties. By the same token, surely, they should not be invited to the coronation in May. There has to be a price for publicly attacking the King, the Queen Consort and the heir to the throne, attacks in which he gave accounts of private occasions when he must know that the people he condemns can never give their version of the events.