Mandelson files show no mitigation of security concerns over US appointment

Exclusive: Papers to be published on Monday cast doubt on assurances provided by senior Whitehall officialsEmbarrassing WhatsApps, but no vetting report: what will be in the new release of Mandelson files?A trove of government documents about Peter Mandelson contains no record of any measures taken to mitigate serious security concerns over his appointment as Washington ambassador, the Guardian has learned.Multiple …