Sorry. I'm not trying to be challenging. I'm just saying that 'streaming schedule' and 'BBC schedule' -- unless you know something we don't -- are basically black boxes; we, and I assume you, have no insight into either. With respect, you're the one who said "Sort of sounds like they adopted a streaming service style shoot schedule" which implies you know what a streaming schedule is, and you know what the BBC shooting schedule
was (even assuming that changed, which is also a ... thing?) It's less a question more a statement with a whole bunch of uncited premises.
But it's all cool. You know nothing, I know nothing, none of us know anything, least of all what the shooting schedules are.