Chip in the Sugar (Samuel French Ltd)

Graham, a middle-aged bachelor, emotionally retarded and chronically dependent on his mother, finds life difficult enough at the best of times. When Mother meets an old flame and seems set to marry him, however, Graham's old insecurities rear their ugly heads again. Fate, eventually, rescues Graham and he resumes his normal life of banal muddle under his mother's amnesiac tyranny.