The BBC is not politically neutral. It's the legal propaganda arm of the British State.
All news services do this. And it already fragments and destroys and hope of really talking about the news in a healthy manner IMHO.
Guessing it's everyone that's not in the UK.
It might not be obvious to those within the UK or maybe further afield if reading articles on relatively neutral topics like science or climate, but the BBC is a bulwark of UK Government political influence and Oxbridge sensibilities.