Brussels Airport asks airlines to cancel nearly half of their outgoing flights on Monday.
TikTok says it will introduce measures to “strengthen our platform” although it disputes some of the findings.
Trump says a deal is done but the details have not been confirmed by China or the app’s owner ByteDance.
Ministers say software developed by the Cabinet Office has helped to ramp up fraud detection.
Addressing the case publicly for the first time, Bill Ready says the tragedy “guides” the firm’s work.