Sir Keir Starmer could be facing renewed pressure as a result of the Peter Mandelson scandal , as the next tranche of files is said to be expected as early as next week. The prime minister – who is clinging on to his premiership amid growing calls to resign – has been constantly embattled by the fallout of his decision to appoint Lord Mandelson as Britain’s ambassador to Washington. The former Labour peer was sacked last September when new information about his links to Jeffrey Epstein emerged, but the scandal has threatened to bring down the government several times since then. MPs ordered the government to publish a huge tranche of documents connected to the appointment in February, but so far only a handful have been released.…