>>2825464"Since the creation of the system, the size of the white-collar groupings (ABC1) grew from 34% in 1968, to 55% of the population in 2016. Within this section, the professional and managerial groupings (A and B) doubled, from only 12% in 1968 to 27% in 2016.[3][4] C2DE has shrunk over this period from 65% to 45% of the population. With pensioners and unemployed people included in C2DE, this means that ABC1 represents a majority of the working population.
A 2019 YouGov poll found that 41% of ABC1 identified themselves as working class (and 51% as middle class), while 66% of C2DEs identified themselves as working class (and 25% as middle class). Matthew Smith, Head of Data Journalism at YouGov, said that while NRS groupings "are often used as shorthand to refer to the middle class and working class", "the problem is that the NRS social grade was never designed to describe class".[8][9]"
Supposedly it's not supposed to be about class, even though it's 90% of the time used as a shorthand for it and the pic I linked is literally from GCSEs textbook material.