There has scarcely been a time in the BBC’s 95-year history when it hasn’t faced accusations of political bias. But it has been decades since the criticisms emanated so strongly from the left. This is a consequence of the collapse of a centre ground which had long been the BBC’s political fulcrum. As the Labour Party shifted leftwards, attracting an unprecedented influx of new members, its MPs and party bureaucracy fought back. And since the BBC is deeply embedded in Westminster, and routinely defers to the consensus there in setting the parameters of political debate, its political reporting has been skewed against Jeremy Corbyn and his supporters.