I t is telling that the person who first floated the idea of Peter Mandelson as the next UK ambassador to America was probably himself. He seems to have looked at his global contacts and thought: this is why I’m useful. Whitehall’s security vetters, UKSV, looked at the same contacts and thought: this is why he’s not. The latest revelations illustrate something rotten about modern politics. What the wealthy and connected think makes them an asset is exactly what makes them a risk. In late 2024, Lord Mandelson was announced as the UK’s ambassador to Washington by Sir Keir Starmer. That posting ended in disgrace last year after US files exposed the depth of his links to the sex offender Jeffrey Epstein.…