That's not quite what I said, spicerack. The BBC is biased towards impartiality, even when it shouldn't be. That is still a form of bias.
Regarding QT as an example, in the run-up to the 2015 election one of my friends was in the audience, and informed me that the audience make-up in that case was something like 25% Tory, 25% Labour, 25% Lib Dem, and 25% undecided. This is the definition of impartiality -- except, of course, that the *actual* representation should effectively have been (ignoring those who never turned out), 37% Tory, 30% Labour, 7% Lib Dem and 26% "other". Thus the QT audience ends up being heavily biased in favour of the Lib Dems in particular, at the expense of the Tories, because the BBC tried to be too literally "impartial".