A limited version of the Cabinet Office inquiry has been made public, a document which is likely to prove pivotal in determining Boris Johnson's future as he faces anger over the partygate scandal.

Updates and reaction as version of Gray report is released - politics live

Now that the "update" of the report has been published, the PM will face MPs in the Commons from 3.30pm.

Key points in the version of the Gray report include:

• Some of the behaviour surrounding these gatherings is difficult to justify

• A number of the gatherings should not have been allowed to take place or to develop in the way that they did

• At least some gatherings represent a serious failure to observe not just the high standards expected of government but also of the standards expected of the entire population

• There were failures of leadership and judgment by different parts of No 10 and the Cabinet Office

• The garden at 10 Downing Street was also used for gatherings without clear authorisation or oversight. This was not appropriate.

• Some staff wanted to raise concerns about behaviours they witnessed at work but at times felt unable to do so

Gray says Met probe means she can't provide 'meaningful report' at this stage

Last week, the Metropolitan Police launched a criminal investigation into potential breaches of COVID regulations in Downing Street and Whitehall and requested Ms Gray's report make only "minimal reference" to events it is looking at.

Sixteen events in 2020 and 2021 were investigated as part of her inquiry.

Her update reveals there are only four events the Metropolitan Police will not be investigating as part of its separate inquiry.

The 12 gatherings being looked into by the Met include an event that happened at the Downing Street flat on 13 November 2020, the night aides Dominic Cummings and Lee Cain left their Number 10 roles, and an event to mark the PM's birthday on 19 June 2020.

Ms Gray said the police investigation means it is "not possible at present to provide a meaningful report" setting out all she has discovered.

"As a result of the Metropolitan Police's investigations, and so as not to prejudice the police investigative process, they have told me that it would only be appropriate to make minimal reference to the gatherings on the dates they are investigating," her update states.

"Unfortunately, this necessarily means that I am extremely limited in what I can say about those events and it is not possible at present to provide a meaningful report setting out and analysing the extensive factual information I have been able to gather."

Ms Gray said she has opted not to publish factual accounts of events not under investigation by police because to do so would damage her overall findings.

What has the reaction been?

The PM has come under pressure to resign over the partygate revelations concerning gatherings in Downing Street and across Whitehall during COVID restrictions in 2020 and 2021.

Some his backbenchers have already called for Mr Johnson to go, while a number of others have said they were waiting for the release of the Gray report before deciding whether to send a letter to the 1922 Committee of Tory MPs demanding a contest.

Labour deputy leader Angela Rayner said the findings of Ms Gray's pared back report are "sickening".

She told Sky News that Mr Johnson has "lost of the confidence of the British public" and should resign.

Lib Dem leader Sir Ed Davey called on Conservative MPs to do their "patriotic duty" and get rid of Mr Johnson.

"He must go before he does our country any more harm," he said.

Ian Blackford, the SNP's Westminster leader, said Mr Johnson's position was "completely untenable".

"The prime minister is guilty of breaking lockdown rules and misleading parliament. He must resign - or be removed from office," he said.