"the BBC and its impartiality"

Just to be clear, the BBC is not biased. The Director of BBC News herself says this (kudos to Guido). It must be true.

In order to make sure that no one misunderstands the situation she has told her employees to stop tweeting thier personal opinions. Suppose analysis of tweets showed that everyone at the BBC was biased against, lets say Israel (purely for the sake of argument obviously), why then people might imagine that in some way the editorial judgement of the BBC was influenced by the personal opinions of the people who work there. No sir, the professionals at the BBC leave their personal opinions behind when they enter into the sacred halls. They do, dont they?