The presenter is "responding to treatment" after being taken ill on Tuesday, says the BBC.
Spectator chairman uses his "impartial" BBC platform to denigrate a commercial rival.
The former head of BBC News will take up the post in early March.
We must understand the BBC as a pre-eminent state propagandist and censor by omission, says John Pilger.
As the Lord McAlpine case shows, at some point we have to trust news organisations to tell us the truth.
The story of a generation - lied to, again and again, yet ultimately powerless.
This a flawed, human institution like any other.
There's quite a lot of settling old scores going on, says Tristram Hunt.
After the Newsnight debacle, it is excessive caution – not recklessness – that threatens the BBC.