[Skygeek]

I've wondered previously why the One O'Clock News studio would be used for the Nicholas Witchell updates, rather than the newsroom that's used otherwise?

My recollection (not cast-iron) was it was the opposite side of the Breakfast News studio, so presumably, if they were coming in to start the night shift and felt the need to have different "streams" for One and Two (with programmes starting and ending at different times), then it would've made sense to fire up the morning studio early in order to achieve that.

Just an educated guess.