Norton could return as O'Grady threatens to leave Channel 4

British TV presenter Paul O'Grady has threatened to leave Channel 4 over plans to slash his chat show's budget in half, fuelling speculation that Irishman Graham Norton may return to the broadcaster.

O'Grady, 54, whose contract runs out at the end of this year, said he would not be part of a programme which had "outrageous" cuts made to it.