sandy...you haven't noticed it, because it doesn't exist.
If the BBC don't have their collective lips firmly attached the back end of the Tory Party, making a loud sucking sound, they are accused of being left-wing. Even supposing its true, it doesn't seem to have prevented the Tories from winning last week has it ?
Anybody who heard Naughtie interview Harriet Harman this week will know that the Today Program, at least, gives all politicians a hard time,no matter what hue.