Greg Barker, the energy minister whose relatioship with a lobbyist raised eyebrows here a few days ago is apparently under investigation by the cabinet office.
The prime minister has disclosed that the close ties between Greg Barker, the climate change minister, and the energy consultant Miriam Maes have raised such concern within Whitehall that the cabinet secretary and a permanent secretary have been asked to examine whether she was properly appointed.
I can't say I'm holding my breath. Experience of suggests that Whitehall investigations, and particularly those involving green tinged politicians, end with a nod and a wink.