One warning though: the plan seem to have involved John Birt - so no wonder it didn't go ahead.
But seriously, the detail of this planning - including draft speaking notes for the announcement and a profile of qualities the new chancellor should have - demonstrates a remarkable degree of distrust between Blair and Brown, to an extent which hasn't previously been clear in such a concrete fashion:
The paper provides the first concrete proof that the speculation was true, including draft speaking notes for the Prime Minister, a briefing for the " new Chancellor", as well as a list of personal qualities Mr Brown's successor should have.
Marked "Copy No 1 - Prime Minister Confidential Policy", the paper says the new Chancellor's qualities must include "lack of personal investment in previous policies". It adds that "teamwork" is a key asset, something that arch-Blairites have accused Mr Brown of being incapable of.
The document adds that on the first day in office Mr Blair should " convey to the new Chancellor" his plans to split the Treasury and hand many of its key roles, including responsibility for tax credits, to other ministries.