Boris Johnson deliberately misled parliament over Partygate and was part of a campaign to abuse and intimidate MPs investigating him, a long-awaited report by the privileges committee has found.

In an unprecedented move, the cross-party group said he would have faced a 90-day suspension from the Commons had he not quit in rage at its findings last week.

Johnson was also found to have knowingly misled the committee itself, breached Commons rules by leaking its findings last Friday, and undermined the democratic processes of parliament.

As a result, it was recommended Johnson be banned from getting the pass granted to ex-MPs that allows them privileged access to the Westminster estate.