LONDON — Ten new “healthy towns” designed to get people to exercising more, eating healthily and live independently during old age are to be built across the country, NHS England announced on Tuesday. The towns — comprising more than 76,000 affordable homes — will include fast food-free zones near schools, safe green spaces, “dementia-friendly” streets and accessible GP services. See also: Your morning coffee could contain up to 25 teaspoons of sugar Designed to tackle…