Sam Blake - The Black Man in the Top Hat

Sam Blake is the black actor who appears in the pub sequence wearing a top hat, who is then approached by a white woman and dances with her until the landlord objects, and breaks them up. Sam continued playing bit roles in British films throughout the 30s and 40s, but I haven't identified any credits after Cry, the Beloved Country (1952). He has a distinctive face, which makes him easy to recognise, but he rarely received any screen credit. I believe he could be the Sam Blake described as a "Jamaican air raid warden" based in London during the Blitz in Peter Fryer's 1984 book Staying Power - The History of Black People in Britain.