David Cameron needs Willie Whitelaw. He has Nick Clegg

David Cameron needs a Willie. So say the ministers who work most closely with No. 10. It is not a call for shock-and-awe radicalism, but for someone who can help the Prime Minister as the late Willie Whitelaw helped Margaret Thatcher — gliding around Whitehall, pushing forward the Cameron agenda, smoothing over difficulties and ensuring that Downing Street’s writ runs in every department.