The phrase was Orwell's, he was describing the people who are working class, but delude themselves into thinking otherwise because they presently own suburban homes and speak with more upper class airs.
That's because your definition of "class" has been outmoded for 20-30 years.
Here, "class" is defined almost entirely by your job, but may indicate things like home ownership and education. What your parents did for a living is entirely irrelevant because that has almost no bearing on what
you do for a living.
For example, my friend's parents were very "working class" and lived on a council estate. She speaks with a strong Cockney accent. However, my friend has a degree, owns her own home, does a technically-demanding job at management level ... there's no possible way you could describe her as anything but "middle class".
And I'll have you knwo, many of u still do work in factories
A statistically insignificant proportion. Most factories are largely automated, so they don't employ that many people. For example, during a previous economic crisis, car manufacturing was reduced, and about 6,000 people from that industry lost their jobs. Similarly, about 100,000 people from the banking industry lost their jobs.
The point was, many people sterotype the working classes as being manual labourers, and anything above that as being middle class. This is an American imported idea, while anyone wise to the differences in class can point out idiosyncrasies that go beyond mere wealth and accent.
Quite the reverse, in fact: the American model of "class" puts people as "working class" who in the UK would be "middle class".
The demographic model almost universally used these days in the UK simply says that anyone who is not a. unskilled/manual labour or b. unemployed is, by default, middle class. If you work in an office, you are middle class.
So, bringing it back on topic, whatever the
stereotype of the average Brit is - of being posh with their own butler, or some Cockney like in Eastenders - the statistical, actual,
average British person is probably a marketing assistant working in the insurance industry.