Progress at last. Just spoken with Simon Yeadell of Ernst & Young. He says that E&Y have just appointed a group of accountants EDO Storey-Hayward (can't seem to find them on a Google search so I probably misheard the name, but it's something similar). They're going to look after the "credit trust" (the new name for the so-called ring-fenced fund) and decide who gets paid from it.
Yeadell's given me a phone number for someone at EDO S-H so I'll give them a call tomorrow. But his expectation is that the company would be writing letters to all concerned very soon to let them know what's happening.
UPDATED: The correct name of the company is BDO Stoy Hayward. Thanks to Scott for the enlightenment.
That'll be BDO Stoy Hayward - http://www.bdo.co.uk/
Ta!