So impressed was Home Secretary James Chuter Ede , he appointed Young to the vacant post of Assistant Commissioner `` D '' of the Metropolitan Police in London , in charge of organization , recruitment , training and communications . So impressed was Home Secretary James Chuter Ede with the young Chief Constable of Hertfordshire that in 1947 he appointed Young to the vacant post of Assistant Commissioner `` D '' of the Metropolitan Police in London , in charge of organization , recruitment , training and communications .