Amongst the millions of Epstein files is one from the paedophile financier crediting Lord Mandelson as being the “third man in New Labour”. Sidelined under John Smith’s leadership in the early 1990s, Lord Mandelson forged a political alliance with Sir Tony Blair and Gordon Brown that transformed the Labour Party and its electoral fortunes. Thirty years later, as Morgan McSweeney, Sir Keir Starmer’s chief of staff, attempted a similar transformation – he turned to Lord Mandelson for advice. Mr McSweeney’s Labour Together project was, in many ways, an echo of New Labour – a bid to purge the hard-Left to...