To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Share Embed Share URL Video File Node URL Embed Code <iframe title="MRC TV video player" width="640" height="360" src="https://www.mrctv.org/embed/53307" allowfullscreen></iframe> Lord Ara Darzi goes on CNBC to defend NHS over rejected ads, but says U.S. helath care system is ‘excellent.’