Let's see
The current political editor is a former Tory Party Appartatchik
The mail Politics program his hosted by Andrew Neil, former Murdoch editor of the Times in the Thatcher Glory Days (tm) and has Michael Portillo, former Tory Cabinet Minister and the token leftie is someone wwho fell out with the Labour Party a long time ago
THey employ at least two children of former cabinet ministers (Carol Thatcher, though maybe not for much longer, and Maxine Mawhinney)
I'm guessing that the political news in the BBC gets a Tory friendly treatment