But tunes by Ralph Vaughan Williams are a different story. He died in 1958. So things he wrote will be copyright in countries with a “death + 70” (most of Europe, the UK, and I think NZ) approach until 2029. But the US is different. If something was published there before 1923, it’s now in the public domain. If something was first published IN THE USA later, then the current status depends on whether copyright was registered and renewed or not.

So there are few works that are still copyright in England but the USA, and vice-versa too.

There are lots of other complex question around this: what if a tune was never published in the USA? What if it’s never been formally published, but has been circulating on the Internet (and thus on computers in the USA) n text form since teh 1980s etc.