They really are going to have to investigate the Police Officers at the gate of No.10.

Ed Miliband got some well aimed digs in at Andrew Mitchell in PMQs today - "It's a night in the cell for the yobs, it's a night at the Carlton Club for the Chief Whip" is an especially good effort (credit where its's due).

But when Milband accused the Tory Chief Whip of swearing at the police - Mitchell made very clear that he hadn't. Here's a screen grab from the New Statesman...

But this means that Mitchell must be very clear, very confident, that a Police Officer has lied and made up his report of events that night in his log.

In which case - there really does have to be an investigation.

I presume Mitchell will shortly be calling for one...