THIS IN SPADES What Sammysquiz said The grades I left school absolutely do not reflect my success in my career. If I look back and think - what if I had gone to a better school that actually took pride in success - then I believe I should have come of school with a clutch of straight As and matching cultural capital which should have take me until I was in my 20s to figure out who Sullivan & Gilbert are. Yes, I had supportive parents but the shit schooling legacy left me mentally inhibited for best part of 20 years. I'm in my 40s now and have only just got my shit together and not feel like 'I shouldn't be here' where I am in my career.
The MAJORITY of my peers are grammar school and private school educated. My previous 2 bosses came from Eton. And I'm in tech (which is supposed to be a great level of entry unlike medicine for example).
It is no small matter when at least half of my peer group come from private school and grammar and they in turn have refused to go down state comp route with their children (even if they are completely aligned to the political left - it's a completely different story when it comes to their children). When just 7% of the UK students are privately educated, I think it accounts for 50% of my companies employees (from an HR insider).
Yes, of course you will always have outliers of X billionaire or millionaire entrepreneur who was not private/grammar school educated but if you are on 6 figure+ salary (£100K is the mean salary where I am) or you are in a very senior management/board level post, the pendulum is swung very unfavourably.
Now here's a fact in my social circle - parents that I know who have their kids in grammar or private do so because they want to minimise unfavourable peer group. Majority of state school teachers are good at what they do, they know their subjects, they have studied to degree level, if not beyond. What makes a shit school is not the buildings, the headteacher or the teaching. It's the intake.It's a social problem and not enough parents are taking responsibility for it (for whatever reason and the reasons are complex- and I have no solution for it). Fact.
I'm sure I'll be completely shot down with my views but in my personal opinion - the biggest thing you can do to close the gap - is to hammer in confidence and belief. To not be led down the path of untoward peer influence and to strive for absolute personal best.