I'm curious how the BBC News World Service works. Is it technically a separate entity?
A tricky question... World Service is run by the BBC, but until recently was funded by the Foreign Office, not out of the licence fee (I think that might date back to the very early days when the BBC was still a private company, which the government paid to run an overseas service, but I might be wrong about that. The private British Broadcasting Company became the Royal-chartered British Broadcasting Corporation in 1926).
Anyway, cutbacks by the current government after they took office back in 2010 changed that, so from now on World Service is funded from the licence fee like the rest of the Beeb (though we may currently be in a transition period - I'd have to check when it actually takes effect).