Originally posted by DAVID RAYNER@May 14 2005, 08:04 PM
Dead of Night (1945). I can't remember anybody being trapped in a cellar, though. You're possibly thinking of two different films.
Miles Malleson played an undertaker driving a Victorian horse drawn hearse and he was seen later in the film as a bus conductor who stood on the back platform of a double decker and said "Room for one more inside, Sir", just before the bus met with a terrible accident.
Micheal Redgrave was the ventriloquist who's dummy took him over.