I am a sucker for these old British movies from the fifties and sixties. This reminds me a bit of AN AMERICAN TRAGEDY except it's a British one.
A young man gets a good job in a mill town after completing his WW 2 service. Two women enter his life. One is the daughter of a town bigwig, who sees little to like in the young man. The other is an older woman, married, with a brute of a husband. Harvey is perfect in the role and Signoret won an Oscar for her part. She is sad and seductive. Quite a good movie if a hair long. And it is hard to see why Harvey, even initially, was so seduced by the younger woman. She is ordinariness personified but maybe that's what he needs.