Directors from some of the U.K.’s top shows have called on the streaming platforms to agree a deal on royalties. Among those who have signed the letter are directors Saul Metzstein, James Hawes and Jeremy Lovering from Apple TV ‘s “Slow Horses,” “Black Mirror” helmers Sam Miller, John Crowley and Colm McCarthy, “The Crown’s” Sam Donovan, Erik Richter Strand and Jessica Hobbs as well as “Rivals” director Dee Koppang o’Leary plus Ben Palmer, who directed “The Inbetweeners” and “The Completely