The most senior civil servant in Britain's Foreign Office has been fired former ambassador Peter Mandelson's security vetting not being disclosed.

A decision to go against the recommendation of the vetting agency was taken by officials in the Foreign Office, spokesperson says.

PM faces calls to resign as government says he was ‘not aware’ Foreign Office overruled disgraced Labour peer’s vetting ‘until this week’

It comes after it emerged the peer failed security vetting but the Foreign Office still allowed him to take up the post.

Keir Starmer understood to have lost confidence in official over decision to override security vetting failure

Darren Jones says he has ordered an urgent review into news that the Foreign Office ignored security vetting advice

The decision to appoint Peter Mandelson as envoy to the Trump administration has backfired spectacularly and could bring down the prime minister.

PM says he is ‘furious’ and did not know security officials had recommended that Mandelson be denied clearance

Starmer’s disastrous decision to make New Labour veteran the US ambassador has led to months of political outcry

The PM is facing calls to resign over the revelation that Lord Mandelson did not pass security checks.

PM says it is ‘staggering’ and ‘unforgivable’ that he was not told Mandelson had failed security vetting. Lucy Hough speaks to the Guardian’s head of investigations, Paul Lewis

Almost all officials working in Foreign Office HQ undergo process before gaining access to top secret material

The most senior civil servant in Britain's Foreign Office has been fired former ambassador Peter Mandelson's security vetting not being disclosed.

PM said he was ‘staggered’ not to have been told that Peter Mandelson had failed his security vetting before becoming ambassador to the US

Lord Simon McDonald says Mandelson scandal is the biggest crisis in the diplomatic service in decades

Exclusive: Helen MacNamara calls Starmer’s decision to sack Olly Robbins ‘unacceptable’

Exclusive: In an interview with The Independent, former foreign secretary James Cleverly sets out the reasons why ministers must have known Peter Mandelson had failed his security…

The prime minister says he only learned of security concerns around the ex-US ambassador earlier this week.

Downing Street takes unusual step of releasing document ahead of PM’s Commons showdown over Mandelson scandal

Keir Starmer faces intense scrutiny from MPs over the Mandelson scandal amid growing calls for his resignation.

The PM tells the Commons that if he had known the peer failed security vetting he would not have been appointed.