It may not come as a massive surprise to anyone who has seen, for example, the makeup of the current government, but a new report has warned unofficial 'poshness tests' are preventing the best working-class applicants from getting jobs at elite British companies.
We've turned the research from the government's own Social Mobility and Child Poverty Commission into a quiz. Take it below and tell us how you get on in the comments.
Quiz: [Could you get into Oxford University? Prove it]3