Diana developed a “very glamorous regal style” for overseas trips, for example, that paid homage to the host nation. She wore a dress emblazoned with gold falcons, an emblem of Saudi Arabia, during a trip to that country. This fashion diplomacy clearly reverberates in the legacies of Kate Middleton and Michelle Obama, for example, who often wear clothing that salutes to their guests' home countries.

So, ‘global Britain’ eh? This, we are told, will be the leitmotif for Theresa May’s Brexit speech tomorrow and, indeed, for her approach to international affairs more generally. And who could disagree with any of that? The argument will, of course, be couched in economic terms. The spirit of Britannia will be unleashed to sail the world’s oceans. Britain is back, you know.