Are you sitting comfortably?
Peter Mandelson has now begun to reveal part of the fascinating story of the behind the scenes dealing which led to the formation of Britain's first post-war full coalition government.
I am hard at work on a documentary which aims to tell the whole story, as seen by the key players involved. Tony Blair's switch from proponent to opponent of a progressive realignment is just one example of how the story of five days in May is, in reality, the story of two decades of British politics.
The hour-long programme will air on BBC2 later this month. In the meantime, please forgive the sporadic blogging.