The head of Sky News is to quit in September after a multimillion-pound relaunch last year failed to attract new viewers.
BSkyB confirmed the departure of Nick Pollard, who has run the 24-hour news network for 10 years, but said the decision to leave was his own.
In January Mr Pollard admitted that recent months had been "the toughest time in Sky News history" after viewers reacted negatively to a host of new presenters, including Eamonn Holmes and James Rubin.
After years of dominating 24-hour rolling news, Sky News has lost ground recently to BBC News 24, which has pulled ahead in ratings with average weekly figures of 6 million viewers, up from 5 million in 2005. Sky News has lost viewers, down from 4.6 million to 4 million.