Bizarre British film

[forbidden_moose]

One more for you experts; It was black and white and set in the Victorian in a haunted house that had a Sunset Boulevard or Great Expectations vibe to it. There were these horrible aristocratcs who invited friends over for dinner, and a few of them were killed over the course of the film. I'm not sure if it was horror or really bad drama. There seemed to be a few songs and a dance scene or two. it ended with a preist who tried to exorsize the house with a satanic ritual. I'm sure this film was real.