<text>  Nick Clegg was left fuming when an award-winning TV journalist called him a lying two-faced swine in front of an audience of children. The incident occurred when Sky News foreign editor Sam Kiley played the part of the Lib Dem leader in a warm-up for an election programme at Skys Westminster studio. Sitting in the hosts chair, Kiley, 50, said: Right, kids, Im Nick Clegg ask me a question. Nick Clegg was left fuming when Sky News journalist Sam Kiley left called him a lying two-faced swine A girl in the audience, made up of children aged ten to 12, asked: Why did you not keep your pledge on tuition fees? Kiley replied: Thats because Im a lying, two-faced swine, prompting gales of laughter from the children. But the newsman who has survived several brushes with death over his 25-year career as a foreign reporter had no idea that Clegg was standing behind a nearby camera and heard the jibe. He muttered sarcastically: Thanks, Sam. One witness said: Clegg looked thunderous but the children thought it was hilarious. And so did the adults who were there. A Sky insider said: It was really unfortunate and Sam was horrified. He said it as a joke and didnt mean it. Clegg shouldnt have been allowed in while the warm-up was on. He looked very cheesed off. 