A two year deal that would see Jonathan Ross present twenty chatshows a year for Channel 4 and net his production company up to £10m will no longer be going ahead, pending the arrival of new chief executive David Abraham who is believed to have reservations about the agreement.
"We continue to talk to Jonathan about working together," a Channel 4 spokesman said. A spokesman for Ross declined to comment.
It is understood that other broadcasters, including BSkyB and ITV, are not currently negotiating with Mr Ross. Both broadcasters declined to comment.
Mr Ross began his presenting career at Channel 4 with The Last Resort 1987, but later moved to the BBC where he currently hosts a BBC1 chatshow, Friday night with Jonathan Ross, a BBC Radio 2 programme and a BBC1 film review, Film 2010 whose final edition was recorded this week.
"In response to a number if queries ... yes, it my last ever film 2010 tonight. But on to bigger and better things soon," Mr Ross posted on Twitter. His three year BBC deal worth £16.9m ends this July and his departure was announced in January, although he has said he will continue to host BBC1's Comic Relief and the Bafta film awards for the Corporation.