Grandparents were working class - they worked in factories all their lives and lived within walking distance of work... in traditional working class areas (Aston & Ladywood)
I guess my parents were the ones who went from working class to middle class - my Dad started as a carpenter living in Kingstanding, then had a change of career, starting wearing a suit and moved (with my Mom) to Erdington and then latterly Sutton Coldfield. 2 cars and foreign holidays followed (late 80's). I was raised in a typically middle class household.
Therefore I'm middle class. I work, I live in Four Oaks and I'm 'comfortable'. I have worries, but luckily money isn't one of them, due to 1) my job and 2) never spending any money!