The last Metropolitan police commissioner to resign, James Munro, did so in 1890 after failing to apprehend Jack the Ripper. Sir Ian Blair's departure may not be the result of so egregious an oversight, yet the reasons behind it have inspired much debate on Fleet Street. The Times is in no doubt that Mr Blair's resignation is the result of a "Tory coup" engineered by the Mayor. The Guardian agrees, and even has Boris......