Carol Vorderman has decided to leave her BBC radio show due to new social media guidelines.The former Countdown star, who's been hosting a Saturday morning show on BBC Radio Wales for five years, said she's "not prepared to lose my voice" after the corporation introduced new rules. Carol has been quite outspoken about the Government on social media and has had several online spats with Tory MPs. In a statement, she said: "The BBC recently introduced new social media guidelines, which I respect.