Ellie Bamber worked with a trainer for her role as Kate Moss.Justin E Palmer/GC ImagesEllie Bamber trained for more than two years to portray Kate Moss.Her trainer focused on strength training instead of excessive cardio.The approach avoided calorie counting and restrictive dieting.It was the era of heroin chic. When iconic supermodel Kate Moss was at the height of her modeling career in the 1990s, she was often pictured at clubs with a cigarett…