Margaret Busby, Britain's youngest and first black female book publisher, born in Ghana.
Lee Child, Brummie son of an Irishman
Emily Wilson, academic from a family of academics
Lemm Sissay, fostered (turbulently) son of an Ethiopian single mother.
Sameer Rahim, the author of the piece, a journalist. Not sure of his background so I'm guessing your "uppercrust British toffs" must be something to do with him, right?
And really do you think that being non-English is a get-out-of-jail-free card here? Are you saying that the Irish aren't British? Are you saying that having divorced parents gives you free rein to pretend you're not a toff? Are you saying that women can't be uppercrust or toffesses?
You have such a racist, sexist view and you seem blind to the snide, sneering dominance exerted by contests like this.
"No".
Incidentally, while obviously I didn't pronounce on it, no, the Irish aren't British.
Feel free to fact-check your theory with an Irishman though.
I won't comment on what I think that all says about your own psychology and insecurities, but will take your opinion on my racism and sexism under consideration - cheers.