Classism isn’t as much of a distinct problem in the United States. It’s felt by some, but it’s more capitalist based. We have numbers to measure by, and the classes are usually demarcated by money or real estate.
The lowest class is considered homeless in America, with no real estate or money, although I suspect there are lower classes still.
I think the situation in England is different. Classes appear to be a bigger deal there. Depends where you’re coming from, whether it matters or not.