I note that Talking Pictures is showing "Q Planes" (1939) later today. It's the British 1939 equivalent of a James Bond film, not Bond though, a Major Charles Hammond, played by Ralph Richardson. Laurence Olivier was also in the film.
Not a London Films film though the uncredited executive producer was Alexander Korda who was the main person behind London Films. His brother Vincent was the supervising art director. It was directed by the American director Tim Whelan who was one of the directors of The Thief of Bagdad (1940).