Gordon Brown's faltering debut at Prime Minister's Questions was down to nerves, his right-hand man said today. Ed Balls, the new Secretary of State for Schools, said Mr Brown had performed to the "best of his ability". But he admitted: "Anybody is nervous when talking to the nation." Mr Brown made a stuttering start in the Commons, at one point admitting he did not know the answer to a question as he had only been in the job for five days. Mr Balls brushed aside criticisms and said that in the end it would be Mr Brown's experience and "the...