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

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

Exclusive: Opinions split on ‘unprecedented’ release of files, despite demand for ‘all papers’ related to ex-US ambassador’s appointment

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

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

Speculation over the prime minister’s future dominates UK front pages after the Guardian revealed Peter Mandelson failed his security vetting

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

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.

How did the PM’s chosen US ambassador fail security vetting but still get approved, what exactly did he know, and who is to blame?

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

Inquiries into who knew what, and when, will be pored over in coming weeks and could ultimately decide Starmer’s fate

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

Deputy prime minister says it is ‘inexplicable’ top civil servant kept Downing Street in dark

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