Sir Ian Blair unaware of Menezes's innocence for 24 hours

This is just ridiculous. The Telegraph makes it perfectly clear that the stories about de Menezes vaulting the ticket barrier, wearing bulky clothing and acting suspiciously were given to the press by the Metropolitan Police, albeit "off the record" so individual sources cannot be named. Sir Ian Blair is accountable for the conduct of the officers who told those lies. Even if we believe (and it is damned hard to do so) that he did not authorise or initiate those briefings, the fact remains that he is responsible. He must resign.