The Ghosts of Berkeley Square (1947)
The Ghosts of Berkeley Square is a 1947 British comedy film, directed by Vernon Sewell and starring Robert Morley and Felix Aylmer. The film is an adaptation of the novel No Nightingales by Caryl Brahms and S. J. Simon, inspired by the enduring reputation of the property at 50 Berkeley Square as "the most haunted house in London". Despite its stellar cast of highly respected character actors and its inventive use of special effects, the film proved less successful at the box-office than had been hoped.
More at Wikipedia.