Whitehall braced for Sue Gray’s Partygate report, which sources say will have ‘Oh Lord!’ moments

Parts of Sue Gray’s long-awaited report into the No 10 parties will provoke an ‘Oh Lord!’ response when it is published next week, sources claimed last night.

The senior civil servant will finally set out what exactly went on at 16 events across Whitehall.

Some of the most damaging revelations will include how a party in the Cabinet Office ended with a boozy fight. Sources said a number of the findings would make people think ‘Oh Lord!’ because they had been kept secret until now.

It is understood that the report, which is most likely to be published on either Tuesday or Wednesday, will be up to 36 pages long.

A source said Miss Gray’s report would not be as damning as some of Mr Johnson’s fiercest critics are hoping.

Whitehall insiders said Miss Gray was still ‘weighing up’ whether to publish some of the more than 300 photographs she gathered during her investigation.

Some were captured by the official photographer for No. 10. Last night, there was still debate over whether the report would name top figures involved.

Miss Gray is expected to give a factual description of all the gatherings, including how many people attended and what happened. She investigated 12 police-investigated instances as well as four others.

The Whitehall official will also elaborate on remarks she made in her interim report earlier this year, in which she noted “leadership and judgment failures by various areas of No10 and the Cabinet Office.”