Sarah Phelps is a British television screenwriter, radio writer, playwright and television producer. She is best known for her work on EastEnders, a number of BBC serial adaptations including Agatha Christie's The Witness For the Prosecution, And Then There Were None, Ordeal by Innocence, The ABC Murders and The Pale Horse; Charles Dickens's Great Expectations and Oliver Twist; and J. K. Rowling's The Casual Vacancy,[1] and work with the Royal Shakespeare Company.