I've started the bio of Pamela Hansford Johnson and on the whole it is pretty good and has a nice readable style.
But really early on it did a thing that my dearios will recognise as one of those things that We Pedantik Hedjogs do not like at all, which is make an unsustainable statement intended to prove that their subject was a Very Speshul Snoflayk.
No, really, it is not a supportable hypothesis to say that if you read the bios of other srs women writers of the period their childhood is an account of upbringing in privileged surroundings and education by governesses rather than at local girls' grammar, how very different from childhood and adolescence in what was effectively, even before father's death since he was working in Nigeria, a single-parent family in the South London suburbs (Clapham).
To which I say, TOSH.
I will concede that Nancy Mitford, Vita Sackville-West, and E M Delafield would probably all count as upper class (though the situation of the latter is complicated by French father and Catholicism).
Virginia Woolf and Naomi Mitchison probably count as upper-middle/gentry, but the privilege there would probably be 'o hai we are the intellectual aristocracy' (but see Virginia on the educational opportunities meted out to 'the daughters of educated men' and Naomi's complaints about the governess she shared).
Antonia White - father was a school-teacher. Sent to posh convent school and we can see from Frost in May that there were serious class issues going on.
Stella Gibbons. Father was a doctor, but was a GP in a slum area and pretty much the model for the entire Starkadder family. Succession of governesses, whom her father habitually seduced, and then North London Collegiate School for Girls.
GB Stern. Father a wealthy businessman until the business the family was in went crash. Notting Hill High School, though also 'finished' in Germany and Switzerland.
Rebecca West. Father a journalist, who deserted the family when she was eight. Richmond High school, Surrey (1900–01), George Watson's Ladies' College, Edinburgh, supported by bursaries. Sense of downward social mobility compared to rest of family.
Pamela Frankau. Father left her mother. Boarder at Burgess Hill School for Girls.
Winifred Holtby. Prosperous farmer's daughter. Queen Margaret's School, Scarborough.
Elizabeth Taylor. Father insurance inspector in Reading. Abbey School in Reading.
Vera Brittain. Father a paper manufacturer. Grange School Buxton, then boarder at St Monica's, Kingswood.
I could go on.
And I will not even, no, wait, yes, I will, mention 'education in disease-ridden hellhole run by sadistic evangelicals, sisters died'.