The UK government released a vast trove of documents relating to Peter Mandelson’s appointment as US ambassador, in a move that threatens to cause fresh damage to Keir Starmer’s faltering premiership. More than 1,500 pages of documentation were published on the British government’s website just after 2pm. They include emails, text messages and other exchanges between government ministers, aides and Mandelson in the run-up to his appointment as US envoy, a post he held from February to September.