It's the opposite side of Studio B I think - you can see faint grid lines in the background as the big screens on that side of the studio are smaller screens put together to form a bigger block.
It doesn't happen very often anymore, but when the newsreader is in London (presumably because Breakfast was still on-air for News Channel viewers only due to the earlier start time of Marr today, and one of the presenters would normally do the summary) I think before they've used the generic newsroom background that was shown in N6
and TC7 between 2008 and 2013. This time around though for whatever reason they went for a shot from Studio E.
Not the first time they've used that shot on a screen either - occasionally the national bulletins do it on one of the catwalk screens when the presenter is reading a story prior to a sequence where the catwalk screens get used for story-specific graphics.
623058: it just seems like your an mp3 whore