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

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

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

Exclusive: Officials have spent weeks debating whether or not to release highly sensitive information about the affair

As revelations mount and accusations fly, prime minister prepares for MPs’ anger and Olly Robbins’ testimony early next week

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.

Whitehall officials are weighing up ‘unprecedented’ disclosure of documents in security clearance scandal

PM to give Commons statement on Monday, a day before sacked civil servant Olly Robbins tells his side of the story

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

Documents also show PM’s choice for US ambassador was offered ‘higher tiers’ briefing before vetting was finalised

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

PM says in Commons statement he has ordered inquiry into any security concerns relating to Mandelson’s tenure in US

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

PM sets out chronology of Mandelson’s vetting failure – and insists he has not misled MPs

PM admits he made mistake in choice of ambassador as he makes high-stakes statement to parliament over scandal

Jonathan Freedland on what Keir Starmer said – and didn’t say – to the House of Commons about the Mandelson vetting failure