The film was made in 1962 under the auspices of the ailing British Lion company, but it was shelved until early 1964, like several other films made by British Lion or its subsidiary, Bryanston Films.
A charwoman, chargirl, or char, charlady, is an old-fashioned occupational term, referring to a paid part-time worker who comes into a house or other building to clean it for a few hours of a day or week.
Harry H. Corbett who plays James Ryder tells the Peggy Mount character, Mrs. Cragg, that he used to collect rags. A funny comment because he played rag collector Harold Steptoe in Steptoe and Son (1962).
Actress Miriam Karlin whose role was of a left-wing person, as a matter of fact in real life she was a left-wing one, from the Wilkepedia she was a lifelong campaigner for Jewish and left-wing political causes, as well as an anti-fascist activist.