Comprehensive educated, went to Oxford, converted to law, became a barrister. I always earned good money but since I became a KC I have earned serious money.
Things that made a difference:
Supportive parents who wanted me to go to uni (they both left school at 16), and who were not wealthy but didn’t make me get a Saturday job so I could focus on my A Levels.
No tuition fees and I had a grant, plus my college had cheap accommodation which I lived in all three years. I had to pay for the law conversion course but graduated from that with debt of £7.5k.
I didn’t buy a flat till my early 30s but when I did they were cheaper, no banks really carried out affordability checks so it was easy to get a mortgage when self-employed, and I didn’t need a large deposit.
My parents gave me £5k towards the deposit.
We made a decent amount on the flat which we put towards a do-er upper house (though what we made was about 25% of the deposit on the new place and the cost of the works. The rest was paid for from earnings).
My husband and I didn’t have children (not by choice).
Became a KC which was a shedload of hard work to get. Chose a lucrative specialism (ie not crime).
We have well north of £2m in assets including a second home we don’t rent out. I expect to pay off the mortgage on both over the next year or two. I will inherit from my parents but it will be about £200k and won’t be the main source of my wealth. Where my background made a huge amount of difference was when I was a kid - as I say above my parents were v supportive and although not wealthy were determined to shove me up the ladder further than they’d got. I owe them a huge amount for their support and the scrimping and saving they did on very ordinary jobs to make ends meet (I earned more as a trainee than my dad ever did). The other two factors which contributed hugely to my social and economic mobility were no tuition fees and much lower house prices.