
In a statement Duncan said: ‘By any measure, it's been a great five years, during which time we've punched well above our weight, out-performing our immediate rivals both creatively and commercially. Having coped with dramatic structural change and an unprecedented downturn substantially better than most, I believe Channel 4 is in a great position to face the future with real confidence.'
Duncan joined Channel 4 in July 2004. He said he would see through important steps towards securing the best possible future for this organisation before he leaves.
Chairman, Luke Johnson, said: ‘We will immediately get on with the process of appointing his successor. We will move swiftly to appoint headhunters with a view to appointing a replacement in due course.'
Finance director, Anne Bulford, will lead the broadcaster on an interim basis if Duncan leaves before a successor is in place.