Transatlantic English - Accent that was taught to actors to sound "sort of" British

Transatlantic English (less ambiguously known as a Mid-Atlantic accent) is a cultivated or acquired version of the English language once found in certain aristocratic elements of American society and taught for use in the American theatre. It is not a vernacular typical of any location, but rather blends American and British without being predominantly either. Mid-Atlantic speech patterns and vocabulary are also used by some Anglophone expatriates, many adopting certain features of the accent of their place of residence. @Curionic