In a comment on an article in Today's Guardian a right-wingnut called "Sam Widges" writes -

The BBC has admitted there's a left-wing bias "ingrained" so deeply into the system that it's be "virtually impossible to eradicate". Does this mean they're not even going to bother?

I'd love to find the source of these quotes. I suspect they were first aired in a dream of the poster's.

Firstly, no BBC spokesperson would ever admit to such a bias.
Secondly, such an admission, I mean claim, would be an outright lie, admittedly not a new departure for the BBC.
Thirdly, the BBC, nolens volens, has a right-wing bias, a result of its craven submission to the British secret police in its news reporting. In the past all BBC news reporters, news readers and commentators had to be approved by a resident MI5 operative, whose office was in Room 105 at Broadcasting House.
The BBC claims that MI5 no longer vets their news staff - they would, wouldn't they. In fact, at the time in which we now know the vetting took place the corporation had a policy of "categorical denial". But even if that is true the people who now supervise the selection of news staff would themselves be the latest in a long line politically acceptable employees. The right-wing bias, having been carefully planted and nurtured over generations, would be self-perpetuating.
One disqualifying factor in MI5's selection process was membership of the Labour Party. Needless to state that anything to the left of Labour received the same short shrift, pacifists too.
I was interested to note that when the political reporter Nick Robinson left ITN for a berth at the BBC he felt free to reveal that he was a member of the Conservative Party, something he did not shout about when at ITN. In the same vein, the BBC Newsnight frontwoman, Emily Maitlis, is being openly touted as future star of the Conservative Parliamentary Party. In contrast to this mute acceptance of a potential Tory bias the BBC was horrified, and said so, when one of its radio presenters, Melvyn Bragg, was ennobled as a Labour peer. I seem to recall that Lord Bragg was immediately relieved of one of his broadcasting roles.