Leo Barraclough International Features EditorSky Studios, the pay TV network’s production arm, has promoted Gabriel Silver – who oversaw the commissioning of “Chernobyl” – to the role of director of commissioning, drama in the U.K., overseeing a broad slate of ambitious projects.Silver, who is currently senior commissioning editor and executive producer at Sky Studios, takes up his new role with immediate effect, reporting into chief content officer Jane Millichip.Most recently Silver has