Sue Gray report to be completed by end of May at earliest, sources say

Senior civil servant expected to be critical of Boris Johnson when findings about Westminster lockdown parties are published

Sue Gray expects to complete her report into Covid law-breaking parties across Westminster at the end of May at the earliest, the Guardian has been told.

Sources said that the senior civil servant, who for months has been forced to sit on her findings about illegal gatherings while Scotland Yard carries out its own inquiry, believes the police investigation could drag on for several more weeks.