Hi George after the above multitude of incorrect answers abve.I am going to put you all our out of your misery, and give you the answers.
The actor in Question is Conrad Veidt.German born who later became a British Citizen.
The film he is appearing in the film still: was The Theif of Bagdad (1940) with Sabu, playing the title role and Veidt, playing the evil vizier Jaffar.
The 1990’s film it inspired was of course Disneys “Aladdin”
The special occasion in 1937, was the year his career took of in England when he played opposite a young Vivien Leigh, in the spy film “Dark Journey”. The film chosen to open the new Odeon Super Cinema in Wolverhampton.
Below the old cellar head.