St Anne's Court

ItSt Anns Court, St Anns Hill, Chertsey, Surrey, designed in 1937 by the Australian-born architect Raymond McGrath and recently restored by

Does anybody know where the house used for outside shots of Cartwright's house in Tragedy in three acts is located and/or its real name? The inside stuff was apparently shot at Eltham Palace. In the film it was named 'Crow's nest'.