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

Massive tranche reveals ex-ambassador’s scorn for Starmer’s leadership and his unwillingness to share informationIt 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?