BBC News and BBC World to merge

[headliner101]

I guess that's because the BBC go to great lengths to create bespoke international versions for different areas of the World. 

The BBC is a globally respected source of impartial news, not a mouthpiece for UK-esque propaganda.  Many other international broadcasters attempt to push a message to the World, instead of just presenting information.

The BBC's domestic news output often includes regional content which would be of little interest to anyone outside the UK. A yacht catching fire in Torquay is meaningless to someone in Singapore.

Another thing worth pointing out would be sports broadcasting rights. For example, if the BBC bulletin domestically is running a story about F1 or even Eurovision, they have the rights to rebroadcast that footage in the UK only. due to specific rights allowing this (the BBC take snippets of the Sky Sports F1 broadcast thats on Channel 406 on Sky to do this without consequence because the bbc would have an agreement with Sky for this], and Eurovision they have the rights in the uk anyway by being the principal uk broadcaster for it). But if you’re watching the same stories on a world news bulletin, f1 is just still images [either getty images or journalist stills] because they do not have the right to rebroadcast Sky’s content outside the UK and anything from Eurovision is curtailed to the EBU feed.

Prior to the iPlayer, BBC national bulletins were seen anywhere in the world with an internet connection.  Back them, rights-sensitive footage were routinely blocked and replaced with a ‘red screen’ indicating the footage could not be made available at that moment. When some US local broadcasters show their news programmes, they block the sport segments and replace it with a semi-static graphic, usually with sport scores.