Yep: I imagine most people generally hear the interesting and therefore usually bad news about foreign media - and to a degree politics.

To be honest, I think the BBC is biased, just in an accidental, cultural way, not a conspiracy or corruption as such. People in that sort of outfit in this country tend to be a certain sort of person, thinking in certain sort of ways.

You also have the problem of what counts as bias. Should an unbiased broadcaster sit in the middle of public opinion, avoid anything that can be taken as showing a side at all (impossible), treat all sides of every argument as equal or go with some sort of expert consensus? The BBC seems to flit between them, sometimes trying to show balance by giving an equal platform to scientific consensus and nutjobbery, and sometimes having quite a clear 'these are the facts and the informed people know it whether the general public does or not' approach.