Is the BBC too liberal to be impartial?

Two interesting pieces on the BBC report From Seesaw to Wagon Wheel about the corporation's supposed liberal bias. Dan Sabbagh in The Times takes Mark Byford, the BBC's deputy director-general, to task for failing to grasp that there is a case to answer. Brian Cathcart in the New Statesman praises the BBC "as being in a league of its own" in "attempting to uphold journalistic standards", but worries about the effects of "relentless and dispiriting... staff cuts", with more likely to follow.