The thing is, the BBC is incredibly partial, depending on which area of the BBC we're talking about.

BBC News on the web vs BBC News the programme, vs BBC worldwide (which is a seperate org inside the BBC), then there's regional BBC and the prime time talk shows (the hard hitting Andrew Neil and co).

So, when someone says "the BBC is biased against the left" or "the BBC is biased agains the right"; ironically they can both be right, and it's not an indicator of impartiality. It depends on which section of the BBC we're talking about.

And you're totally blind to the bits of the BBC you agree with; you will think those bits are the impartial ones.