Poor Agatha will be turning in her grave

It made my blood boil to read in last week’s Mail on Sunday how the plot of a novel by Britain’s greatest crime writer, Agatha Christie, has been sexed up by the BBC. The Pale Horse, starring Rufus Sewell and Kaya Scodelario-Davis (pictured), is the latest adaptation by screenwriter Sarah Phelps – she added an anti-Brexit storyline to her version of Christie’s The ABC Murders. If Agatha could see what is happening to her works, she would surely turn in her grave. David Courtney, Weston-super-Mare

Is a book ever faithfully adapted for the screen? Every line of speech included as it was written, every scene depicted exactly as the author intended?

I’m think I’m safe in saying that this will never have been attempted in the history of television and cinema.

Every adaptation is bound to present something different to the original text.

People might say: ‘But making the lead character into a twicemarried womaniser when he was a bachelor in the book is too much of a change.’

But I say: ‘Is it?’ Any adaptation will change aspects of the original text. D. Cleary, London