Prince Philip secretly comforted grandson William in touching moment at Diana's funeral
A resurfaced clip of the Duke of Edinburgh shows him being most considerable in his role as grandfather during what was a particularly difficult time for the Royal family. New ITV documentary Philip: Prince, Husband, Father – which airs Tuesday night at 9pm – showcases Prince Philip in a more personal light as video and audio recordings of him reveal characteristics the British public might not have previously been privy too.