See his Wikipedia page.
See IMDB for his extensive filmography and another biography.
He wrote just two plays (that I've been able to discover) for the stage, both adaptations. "A Kiss For Adele" with Ted Willis (Wikipedia doollee IMDB), an adaptation of the play by Barillet and Gredy (produced 1952). This seems to have rapidly fallen into obscurity. And "Queen Elizabeth Slept Here" adapted from a play (George Washington Slept Here) by George S. Kaufman and Moss Hart. This did much better and went on to adapted for TV twice, the first in 1956 and the second in 1961.
Queen Elizabeth Slept Here (1956)