Hidden labs, sex gardens & torture attics: secrets of British royal palaces

If walls could talk, what secrets would those of a British royal palace whisper? Murder, debauchery, treason and more, says Professor Kate Williams. Speaking to Kev Lochun, she reveals how palaces make royal robots of their incumbents, why monarchs always know where they are going to die, and what the future holds for these beloved buildings as the royal family continues to evolve.