Lyrics and Music by Herman Hupfeld; © 1931 Warner Bros. Music Corp., ASCAP
The first place to check would be the distributor, BBC. If they can't license it, they can direct you to the company that can.
Nobody owns the copyright of a single word. Perhaps you mean trademark.
the coca cola company owns the copyright
A minor owns the copyright on any works they create.
Universal.
Rankin/Bass.
Rondor Music.
Word Music.
Paramount.
There are 24 different copyright-protected items by that name.
The phrase "copyright obtained" doesn't give any indication of who copyright might be assigned to.
You can't. It is a right that the writer owns. You can offer to buy the copyright.