I'm not sure if the core feed is available on satellite or it's only available to the BBC privately.
What actually is the ‘core feed’?
Given that the gallery doesn’t play out their ads or break fillers? My understanding was that Red Bee play out each of the feeds for different regions, adding the weather, ads and trailers with regional specific timings.
Yes - I'm not aware that a 'core' feed free of advertising is created by Red Bee, who handle the channel Playout, as I don't believe that feed serves a purpose (so would be a waste of money to create?) (I'm not saying it doesn't exist, just that I'm not aware of it)
During News Channel/World News simulcast production (Outside Source, Beyond 100 Days etc.) when the originating gallery is on-air continuously on the BBC News Channel, then the originating gallery is usually responsible for sustaining the News Channel when Red Bee have left for commercial breaks etc. However this doesn't happen for programmes that are only being carried on BBC World News and don't have a need to sustain on the News Channel.