Just looking back at this post tonight, I was reminded of one of Blair’s conference speech lines:

The first rule of politics: There are no rules

But as the criminal investigation into Cash for Peerages moves ever closer to Tony, the first serving Prime Minister to be interviewed in a criminal investigation, it begins to look like he got that one wrong. Not only are there rules, but his party’s been flouting them.

Last week, we were treated to the huge news that Ruth Turner had been arrested as part of the row. As Director of Government Relations, she’s as much at the heart of Downing Street as it’s possible to be. But more is to come…

The hot news from Guido tonight is that John McTurnan, Downing Street’s Directer of Political Operations, has been interviewed under caution, and that Blair’s Chief of Staff Jonathan Powell could soon be arrested. That would be political dynamite.

And, just as I’m about to publish this post, the BBC have confirmed that John McTurnan has indeed been interviewed under caution. Is it too much to hope that the second rumour is also true? After all, Blair’s said he’ll quit if his aides are charged (at least according to the Grauniad).

The excitement intensifies…