Andrew Parker Bowles

A dashing cavalry officer in the Household Division, Andrew is Camilla Shand's charming, easy-going boyfriend, at ease in aristocratic circles and comfortable being adored without much reflection. He moves through the world of country weekends and polo matches with a soldier's confidence and a rake's low-key indifference to consequence.

Buchan plays him as pleasant rather than villainous, which is the more interesting choice — a man whose charm is genuine and whose carelessness is never framed as cruelty. That restraint lets the show explore how ordinary self-interest, not melodrama, is what quietly reshapes other people's lives.