What is new in the latest release of Peter Mandelson documents?

Mandelson told David Lammy (left), then the foreign secretary, that he would not regret it if Mandelson became British ambassador to the US. Photograph: Carl Court/PA

It is, Downing Street has said, the most extensive release of government documents ever done in response to a Commons motion – nearly 1,500 pages in all. But what does the second and main tranche of documents connected to Peter Mandelson’s role as US ambassador to Washington tell us that is new?

Mandelson did not fully cooperate with the process