Guido hears that a handful of MPs are complaining to Whitehall’s watchdog, the Committee for Standards in Public Life, regarding the report this morning that the Yes2AV campaign have left themselves wide open to accusations of foul play.

As regular readers will remember, Yes’s biggest donor is the Electoral Reform Society. Odd then that its money making offspring Electoral Reform Services Ltd is administering ballots. The group will be both printing ballot papers and observing their return. They will be able to see who has voted by post before the polls close and thus know who to target to get out the vote on polling day. Which is all rather convenient. They are in full denial mode, but lets see what Sir Christopher Kelly has to say…

UPDATE: This isn’t the first time dodgy donor links have got Yes into trouble:

A full list of the No campaign’s mostly Tory donors quietly appeared at the weekend. Despite repeated questioning, the Yes team have still refused to comment on who else amongst them would personally benefit from a change in the voting system.

UPDATE II: Labour’s Tom Harris, Dave Watts and Toby Perkins, with Tories Andrew Bridgen, Eleanor Laing and George Eustice have sent the letters.