In a statement quashing speculation that he may consider an offer if approached, Duncan said: "There has been a lot of speculation about possible candidates for this role and I want it to be known that I will not be putting my name forward. In the event of a formal approach, I intend to make it clear that I do not wish to be considered for the post."
The Channel 4 boss had been touted as a possible successor to Allen as part of speculative press shortlist, which have also includes former Channel 4 boss Michael Jackson, former Ofcom chief executive Stephen Carter, Sky programming head Dawn Airey, former chief executive of Capital Radio, and former Capital Radio chief executive, David Mansfield.
Johnston Press chief executive Roger Parry has said he would consider the job if asked to take it.
Duncan added: "Leading ITV through digital switchover will be a great challenge, but I'm already engaged in, what I believe is, a greater and more rewarding task -- working with colleagues to secure Channel 4's future, ensuring it adapts to remain Britain's most relevant and contemporary broadcaster in the emerging digital world and continues to make a powerful public service contribution long into the future.
"Channel 4 feels to me to be the most exciting place to be in British media at present and I'm hugely enjoying my role. My intention is to be here for some considerable time to come."
Charles Allen is set to leave ITV in October.
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