To hate sounding posh, when I'm not

[privacysettingstalk]

I am quite well spoken, and people pick up on it. They often think I'm privileged, went to a very good school, come from a "good family" if you see what I mean.

I do not.

I was born in a pretty dodgey part of Glasgow to teacher parents. I did bag myself a place at Oxbridge which is where I think it developed. But now, back home nobody believes that I am "one of them".
I feel like I have betrayed my own working class roots by sounding posh.

No ones accent would drastically change that much, in a melting pot accents so as to be come 'posh'. You might have deliberately moderated your accent so you were a better social fit.