As we arise from our beds this Saturday morning, the world does not yet know what galaxy-destroying revelations will be detonated when the much-chewed-over tête-à-tête between Meghan Markle and Oprah Winfrey is broadcast to 68 countries tomorrow night. Anyone looking for insights will have to make do by guessing the context of Winfrey’s overwrought responses in the interview’s trailer. “Almost unsurvivable!” she gasps at one point. “You’ve said some pretty shocking things here!”

How shocking are we talking? Again, nobody knows. But it has made Buckingham Palace jumpy enough to launch a pre-emptive response to what they must imagine Meghan will say about life in the Firm. All week, the British press has been breathlessly relaying accounts from a brace of Palace staff who have trembled before Meghan’s wrath.