Two No10 figures failed to return their Partygate questionnaires, police have admitted.
In a letter to Lib Dem chief whip Wendy Chamberlain, seen by the Sunday Mirror, Deputy Assistant Commissioner Jane Connors said that of the 204 questionnaires sent out, two were not returned.
Scotland Yard will now be under pressure to say whether the two figures are ministers or members of staff, and whether they went on to be fined despite failing to return the forms.
Ms Connors said the individuals were still “assessed against all the available evidence”.
The Met also failed to answer a question from Ms Chamberlain, asking whether any questionnaires were only partially completed.
Following the publication of Sue Gray’s report, junior No10 staff were left furious that they’d been left to carry the can for Partygate, while some senior colleagues had got off scott free.
Sources told the Mirror junior civil servants had been “open and honest” with Sue Gray’s probe – and were fined after she passed their files to Scotland Yard.
But they believe some senior staff had been “more circumspect” with their evidence to Ms Gray, and escaped fines from the Met as a result.
Ms Chamberlain said: “Serious questions remain around the Met Police’s investigation into Boris Johnson ’s law-breaking parties in Downing Street.
“Time and again Johnson has lied and tried to cover up his criminal behaviour. The public now deserves full transparency.”
She added: “It’s important that we find out more about the two individuals who failed to return a questionnaire to the police, whether they were Conservative ministers or senior officials, and if one or both then received a fine.
“We also need urgent clarity over claims that some individuals failed to properly fill in their questionnaires.
“The public would be rightly angry if it turns out Johnson or his Downing Street evaded justice by failing to properly answer questions from the police”
In her letter, Ms Connors added: “We understand the strong interest, feelings and opinions on this case given the pandemic affected so many people in so many ways.
“Therefore, I can assure you and the public once again that the small but skilled team investigating this matter have acted diligently, proportionately, carefully, and impartially.”
On Friday, Labour leader Keir Starmer and deputy leader Angela Rayner said they had returned questionnaires to police investigating whether they broke lockdown regulations while visiting Durham in April 2021.
A No10 spokesman said it was “up to individuals” to return questionnaires.