Departure from party follows release of documents in US appearing to show Jeffrey Epstein sent former US ambassador $75,000

Peter Mandelson has said he has resigned his membership of the Labour party to avoid causing it “further embarrassment” after more revelations about his friendship with Jeffrey Epstein.

The peer, who was sacked as US ambassador last year because of his links to Epstein, featured in documents released by the US Department of Justice on Friday related to the convicted sex offender.