Prince Charles and Duchess Camilla have released their annual Christmas card photo, which shows them sat on a bench surrounded by beautiful flowers.The royal couple look ecstatic as they sit among a collection of bright and beautiful blooms in the garden of their home in Birkhall, Scotland.Their portrait was taken by a member of staff at the home in Autumn. In the snap Charles, 72, looks dapper in a smart creme suit jacket, blue shirt and white trousers.