Plot: Dr Nicola Clark, Dr Katie Carpenter, Dr Alexandra Loske and journalist Stephen Bates help Suzannah Lipscomb unpack the stories of how royal marriages across the centuries have proved to be scandalous and intriguing. From the marriage that was deemed so wrong it caused George III to write a new law, to the first 'People's Princess' - Queen Caroline - who was put on trial by her husband George IV, and more recently Princess Margaret and her relationship with Peter Townsend