Australia is about the same except around the ceiling we call it a cornice.
But I’m in Tasmania, some geographic variation in dialect can be expected.
Except, I’m from South Australia, so some people around here think I talk posh.
The category on the B&Q site is called "cornice & coving" so either they mean the same thing or there's a subtle difference in which one is which. Maybe one is plaster and one is wood?