Headteachers sat in stunned silence as she demanded: "Could it be that one of the significant problems that middle-class youth face in our independent schools is denial that your school could ever have any drug problem or the foolish belief that cannabis is not that serious? As one middle-class parent remarked to me recently, 'Elizabeth, of course we are lucky, we don't have a problem with drugs in our schools in the Royal Borough of Windsor and Eton, because the Queen lives here'."