Does Breakfast take the output of BBC London as an outside source to show it as the sustaining feed? If that is the case is there any reason why it couldn't be NWT instead (beyond internal politics)?
It could do, but what would be the point?
If London are unable to provide a bulletin, the Salford gallery take a feed of Tunbridge Wells as a back up, which is the logical next nearest region for Londoners
London doesn't opt as such in Breakfast