The ‘pre-appointment hearings’ system overseen by parliament’s select committees doesn’t exactly set the heart racing; a pale imitation of the American system, where presidential nominees (to the Supreme Court for instance) are savaged by senators sitting as a kind of hanging jury, our version is generally bloodless. Certainly Richard Sharp, the government’s candidate for chairman of the BBC, who dutifully presented himself for cross-questioning last week, emerged with never a scratch on him.