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

Guardian investigation uncovers decision by UK security officials to deny clearance before Mandelson took up role as US ambassador

Ministers and civil servants face scrutiny after revelation Foreign Office overruled vetting procedure for US ambassador appointment

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

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

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.

Starmer says ministers were in the dark, but friends of former top civil servant suggest it was a case of them looking the other way

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

Simon McDonald says Olly Robbins was ‘thrown under a bus’ by the prime minister and the decision feels wrong

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