The working class Tory was the subject of many Sociology exam questions when I took an A level in it in the 70s. Alf Garnett is a good example, for those who remember him. Deferential, prepared to believe that 'toffs' know better than he and his family do, and not prepared to shift his position at all.
As for the Labour middle class vote - much of that depends on definition of class. The industrial working class no longer exists, but there is a whole group of people whose working conditions are no better, and who may see themselves as middle class as they work in offices, shops or call centres and get paid monthly, but their 'relation to the means of production' is no greater than their parents or grandparents who worked in mines, mills and factories. These people tend to be floating voters in 'Red Wall' constituencies.
Because of (largely Labour) policies, the position of many workers has changed, however, so of course their voting base has changed with it. Not everyone votes purely out of self-interest, and a lot of people who realise that their situation is as it is because of progressive policies and want to see others get the same advantage. They are more likely to be LP members I think.