In 1989, Edney starred as Maud in the television production of Uncle Silas with Peter O'Toole, shown as The Dark Angel in America.
[3][4] In 1990, she appeared in the Bruce Beresford film Mister Johnson, alongside Pierce Brosnan and Edward Woodward.
She has also appeared in episodes of a host of successful British television dramas such as Rosemary & Thyme, A Touch of Frost, Prime Suspect, Inspector Morse (and its spin-off, Lewis), Agatha Christie's Poirot (in the episode "The Mysterious Affair at Styles") and Wallander.
In 1994, Edney played the role of Louisa Gradgrind in the television adaptation of Charles Dickens' Hard Times.
In 2012, she played Queen Charlotte in The Madness of King George III at the Apollo Theatre, London.