Question: Who directed The Ghost Train film, which was based on the play written by Arnold Ridley?

Context paragraphs:
The Wrecker (play): The Wrecker is a British play, written in 1924 by Arnold Ridley and Bernard Merivale, and filmed in 1928-29.  Much later Ridley played Private Godfrey in "Dad's Army".

Ghost Train (1927 film): Ghost Train (German: Der Geisterzug) is a 1927 German-British comedy crime film directed by Géza von Bolváry and starring Guy Newall, Ilse Bois and Louis Ralph.  It is an adaptation of the Arnold Ridley play "The Ghost Train".  It was a co-production between Gainsborough Pictures and UFA and was shot at the latter's Staaken Studios in Berlin.

The Ghost Train (1931 film): The Ghost Train is a 1931 British comedy thriller film directed by Walter Forde and starring Jack Hulbert, Cicely Courtneidge and Ann Todd.  It is based on the play "The Ghost Train" by Arnold Ridley.  The film's art direction was by Walter Murton.

Arnold Ridley: William Arnold Ridley, OBE (7 January 1896 – 12 March 1984) was an English playwright and actor, first notable as the author of the play "The Ghost Train" and later in life for portraying the elderly Private Godfrey in the British sitcom "Dad's Army" (1968–1977).

De Spooktrein: It is an adaptation of the popular British play "The Ghost Train" by Arnold Ridley.

The Wrecker (1929 film): The Wrecker (German: Der Würger) is a 1929 British-German silent crime film directed by Géza von Bolváry and starring Carlyle Blackwell, Joseph Striker and Benita Hume.  The film was based on the play of the same title by Arnold Ridley.  It was produced by Michael Balcon for Gainsborough Pictures in a co-production with the German firm Felsom Film.

The Ghost Train (play): The Ghost Train is a theatre comedy suspense thriller, written in 1923 by the English actor and playwright Arnold Ridley.

Peril at End House (play): Peril at End House is a 1940 play based on the 1932 novel of the same name by Agatha Christie.  The play is by Arnold Ridley, who much later played Private Godfrey in "Dad's Army".  Ridley was granted permission to adapt the book in an agreement with Christie dated 18 July 1938.

Ghost Train International: Spøgelsestoget (English title: Ghost Train International) is a 1976 Danish family film directed by Bent Christensen.  It is based on the 1923 play "The Ghost Train" by Arnold Ridley.

The Ghost Train (1941 film): The Ghost Train is a 1941 British mystery thriller film directed by Walter Forde based on the 1923 play of the same name written by Arnold Ridley.

Supporting paragraphs: The Ghost Train (1931 film) Arnold Ridley
Answer: Walter Forde