What's in Peter Mandelson's blind trust?

So 17 months after Gordon Brown first promised a transparent register of ministerial interests, delayed suspiciously, the document has finally been published. Hopes were riding high, policed by the ruggedly independent Sir Philip Mawer, who earned his spurs as a robust Parliamentary Commissioner for Standards. So it's arrived. It's not online so you can get it here It's fine. We get to know Ed Miliband has a girlfriend (but not who), Jack Straw's wife does coaching and that Ed Balls and Yvette Cooper are husband and wife. But, but.... Any minister who wants to not declare outside interests can (and should) transfer them into a "blind trust". Peter Mandelson, Paul Myners and Ben Bradshaw are amongst those who have taken advantage of this. Blind trusts are run by others at arms length, although the owner still receives regular reports on the performance of their assets and continue to receive the money they generate. So while Mandelson, Myners and Bradshaw et al will still know what they put in to the trust, the public do not. Of course, trustees may sell all the assets and buy new ones, but personal finance experts say this would be unusual. The Cabinet Office rules do insist ministers aren't informed about acquisitions and disposals. But Hilary Benn declares his quarter shareholding in a farm, so why not Lord Mandelson? And while Lord Myners mentions his Blind Trust (administered by Coutts & Co) in the Register of Lords' Interests, there's no mention in the same document of Mandelson's blind trusts. Anything embarrassing can simply be hived off into a blind trust. The Cabinet Office says that ministers have always had blind trusts, a claim backed up by the 2005 Ministerial Code. And the Registrar in the Commons says that blind trusts do not have to be registered with Parliament, so no rules broken. But the public have the right to know what's in Mandelson's blind trust. Which is perhaps surprising.