“The theatrical impresario Charles Russell, who has died at the age of 93, worked for many years with Noël Coward. He made his entry into showbusiness in Coward’s 1942 film In Which We Serve, and was responsible for reviving the playwright’s postwar fortunes, acting as his New York business manager from the mid-1950s until the two had a final, disastrous falling out in the early 1960s.”