Underneath the carpet in our flat is some solid brown tile: not lino; it's thick and solid. I'm guessing it's original; the building is from 1950s. I've googled and come up with vinyl, even though I thought vinyl was something shiny and flexible, like a bathroom floor.
I also read that it might have asbestos in it!
I was thinking of maybe trying to get someone to restore it, instead of paying thousands for wood floors, but obviously not if it's asbestos-y.
Any ideas? If I can get myself organised I'll post a pic.