The portents are ominous. Even if there is a strong element of exaggeration and inaccuracy in the rumours that are swirling in the broadsheet media regarding a “slimmed-down” coronation next year, there is clearly a kernel of fact and it suggests that the British establishment, not for the first time, is about to commit a crass error that could diminish the Monarchy – and with it the nation – for at least a generation to come.