On 14 July 1976, Viscount Althorp married Raine, Countess of Dartmouth, the daughter of the novelist Dame Barbara Cartland.
Following Diana's death, Shand Kydd made a point of visiting the family of Henri Paul, the driver of the Mercedes which Diana and her companion, Dodi Fayed, were in when it crashed in Pont de l'Alma tunnel in Paris, killing all three of them.