“Introducing the panel, Cadwalladr said: “I think this might be a Hay first, in which we have an author in a hostage situation. Blink once if you can hear us, Sarah, twice if [Mark] Zuckerberg is an asshole.”

At the end of the event, Wynn-Williams received a standing ovation from the audience, during which she was moved to tears.”

Meta legal action forces Facebook whistleblower to sit in silence at Hay festival