U vs. Non-U words in contemporary British English

From the list given by Wikipedia, I would say that the "U" terms bicycle/bike, vegetables and jam are now standard, as are the "Non-U" terms jack, ice cream and mirror.

When I was a child in the '50s, we said wireless, but I thought everybody did in those days (even though the BBC's listings magazine has always been Radio Times).

We weren't at all posh, but we said lavatory. I've read (in fiction) of children being told off for saying toilet, but that never happened to me, it just wasn't the term we used. Nowadays, of course, it's standard for signs in public places, since we stopped using the euphemism public convenience.