Sir Alex Younger is the Chief of the Secret Intelligence Service, better known as MI6.

As an intelligence officer, he served in Europe, the Middle East and was Station Chief in Afghanistan before taking up the top role.

This is the first time ever that a serving Chief of MI6 has given a recorded interview. In conversation with Alistair Bunkall he speaks about life as a junior spy, the challenges facing his service and the world today and how his staff cope working in secret.