I associate my parents with LMC. It was definitely a "thing" when I was growing up.
Their parents were working class but "respectable" and not as poor as some. My granny was very staunch Chapel so the outlook on life was very moral, even Puritanical.
My parents were brought up with a strong work ethic around established routines. They were clever and very funny - grammar school educated. They loved music and my mother in particular loved languages. They were never wealthy though but thought themselves a cut above others in the community.
My mother was obsessed with appearances. She thought that leaving an unwashed milk bottle on the step was the height of slovenliness.
She was strict in many ways (generally involving politeness and respect) but i had loads of freedom, like other kids of that time.
I used to read the Famous Five and marvelled not at the adventures, but at the elevated (to me) social class of the characters.
i was also amazed a the characters in sitcoms who lived in semis and detached houses, as it was so unlike my own experience. Everyone I know lived in a terraced house.