The Telegraph's investigation into how politicians - from Gordon Brown and his Cabinet to backbenchers of all parties - exploit the system of parliamentary allowances to subsidise their lifestyles and multiple homes.
It's very odd that Tory and Lib Dem politicians are not really responding to this. I suppose that is because they know their time is coming since the Telegraph claims it has expenses for all MPs.
Moreover, although e silentio arguments are not worth much, Harriet Harman, the Milibands, and Alan Johnson seem to be in the clear - all potential heirs to Gordon Brown.
It will not exactly be "fun", but will be interesting to see this stuff come out over the next week or so.
Meanwhile, as of this morning, Harriet Harman is smelling of roses.