The BBC's new director general Tony Hall has complained that actors aren't speaking clearly enough in TV drama. Is it time to cut the mumble, asks Ben Milne. "I don't want to sound like a grumpy old man," Lord Hall tells the Radio Times, "but I think muttering is something we could look at." ... Trends in acting haven't necessarily helped. Method acting tries to capture the "truth" of a character - even if that character can't be heard properly - rather than bowing to stodgy old considerations about being audible from the cheap seats. Its foremost proponent was Marlon...