In Britain healthcare is state-funded, free at the point of delivery to all citizens. The National Health Service is routinely described by politicians of all stripes as one of the country's greatest treasures. But the NHS's reputation has been damaged by recent shocking revelations of failings in patient care. Hardtalk speaks to the Chief Executive of NHS England, Sir David Nicholson. Is his health service capable of meeting the shifting demands and daunting financial challenges of 21st Century healthcare?