Updated on: April 26, 2026 / 1:44 PM EDT / CBS News Add CBS News on Google The following is the transcript of the interview with Sir Christian Turner, U.K. ambassador to the U.S., that aired on "Face the Nation with Margaret Brennan" on April 26, 2026. MARGARET BRENNAN: We turn now to the British Ambassador to the United States. His Excellency, Sir Christian Turner. Good to have you here. AMB. CHRISTIAN TURNER: Good to be here. Margaret, thank you. MARGARET BRENNAN: You too, were in that ballroom last night. You got a lot of security training for unstable countries where you have been posted as a professional diplomat over the course of your career. Did you ever imagine in one of the most heavily guarded rooms in DC, you'd have to put that to use? AMB. TURNER: Well the training I've had in some of those places I've been actually kicks in last night, you basically do what you're told and let the professional security folk do what they do. And I think it was one of my big takeaways last night.…