X Factor host Dermot O'Leary said he is not worried about being replaced on the show.

O'Leary told The Observer: "You've got to believe in a meritocracy, otherwise you'd go mad. And if I carry on doing a good job . . . The most important thing for me is that I carry on enjoying it.

"Simon [Cowell] is actually weirdly far more chilled than he lets on. I've probably had three or four chats with him in seven years about what I'm doing. And for the most part he lets me get on with it and therefore I can't come to any other conclusion than that our relationship is built on trust."

The X Factor returns on Saturday 31st August at 8pm.