Hadlow is taking a sabbatical in order to focus on writing a book on George III. She will also spend some time consulting on the wider BBC Vision strategy.
Jana Bennett, director of BBC Vision, said: "Having commissioned both current affairs and arts programmes for BBC Four since its inception, George really understands the channel and I know he will steer it effectively and creatively through the next six months.
BBC Four was named Channel Of The Year at Edinburgh in 2006.
Jana Bennett, director of BBC Vision, said: "Having commissioned both current affairs and arts programmes for BBC Four since its inception, George really understands the channel and I know he will steer it effectively and creatively through the next six months.
BBC Four was named Channel Of The Year at Edinburgh in 2006.