Aren't you disproving your own point by sharing this. Considering as a country we are not in the top ten for social mobility metrics that says it all. There are many documentaries, books, articles on topics relating to social mobility, things relating to job discrimination based on regional dialects (northern accents having a negative affect on how people perceive them), misrepresentation in certain professions and reduced opportunity.

Yes I agree if you have ability you are able to take it far however there is significant reduced opportunity for those from an environment or background. Just because some working class families managed to raise a child into a good profession doesn't mean its that easy or simple, survivorship bias can be applied here for every Doctor, lawyer, engineer or other high earning profession how many working class people get caught up in poverty, zero hour contracts, struggle to find the time or money to put them through courses to become more educated because they are busy trying to survive? Ranking 21st in social mobility for a country as developed and as far ahead of the curve as the countries history has been is abysmal. That doesn't even take into consideration the amount of cheap labour it uses abroad for good and services, if you could quantify the exploitation of sweat shop workers, child farmers and the like I really wonder how you can look at such a minority of cases and think. "social mobility is good in this country"