Warnings were ignored because No 10 had already made up its mind to let Peter Mandelson sail through, says Guardian columnist Gaby Hinsliff

What have we learned from release of files relating to former peer’s appointment – and sacking – as UK ambassador to Washington?

Newly released documents also show Peter Mandelson was offered highly classified briefings before formal vetting was complete

Sir Keir Starmer was warned there was a ‘general reputational risk’ in appointing Lord Mandelson to the role

Warnings were ignored because No 10 had already made up its mind to let Peter Mandelson sail through, says Guardian columnist Gaby Hinsliff