The most anticipated Russia report from the UK parliament’s intelligence and security committee is expected to be released on Tuesday morning, nine months after its publication was blocked by Boris Johnson before the general election.

An examination of the reach of the Kremlin into UK politics and public life, the document is the product of year and a half’s work by a cross-party committee taking proof in secret from British intelligence and independent specialists.

Bringing down Street has repeatedly looked to make light of the importance of its contents, despite the fact that the prime minister would not clear it as legally necessary last October, preventing its publication for months on end.

Proof was submitted by the previous spy Christopher Steele, denouncing senior UK government ministers, including Johnson and the previous prime minister Theresa May, of disregarding claims the Kremlin had a “likely hold” over Donald Trump.

The MI6 veteran likewise told the committee there was proof the Kremlin attempted to secretively fund Brexit and impact the aftereffect of the 2016 referendum, in spite of the fact that it is unclear how far he affected the final document.

Publication of the document comes days after the nine-strong committee dismissed Johnson’s decision of chairman, the previous minister Chris Grayling. Individuals voted by five to four to help the veteran Conservative Julian Lewis.

An irritated Downing Street stripped the party whip from Lewis, who had been a Conservative MP since 1997, yet has since moved in an opposite direction from attempting to expel him from the committee’s membership.

After a day the reconstituted committee consented to release the Russia report, which must be published when parliament is sitting – and harmonizes with the visit to the UK of the US secretary of state, Mike Pompeo.

Trump has been dogged by charges that his election triumph over Hillary Clinton in 2016 was supported by Russia, chiefly by the hacking of Democratic party messages in the approach the vote.