Jake Kanter International TV EditorMore than 3,500 film and TV professionals, including top British actors and creatives, have signed an open letter to the UK screen industry demanding an end to “systemic racism.”The missive was adapted from a “powerful and eloquent” letter published in Hollywood last week and its signatories include Michaela Coel, Chiwetel Ejiofor, Colin Firth, Jane Featherstone and David Yates.You can read the full letter below, but at its core are four demands:Other notable