Boris Johnson has been referred to police by the Cabinet Office over further potential rule breaches during the Covid pandemic.
The department said it made the referral after a review of documents ahead of the Covid public inquiry.
The former prime minister, who was fined last year for breaking Covid rules in 2020, denies any wrongdoing.
The Metropolitan Police said it was assessing information it had received from the Cabinet Office last week.
“It relates to potential breaches of the Health Protection Regulations between June 2020 and May 2021 at Downing Street,” the force added.
A spokesman for Mr Johnson said: “Some abbreviated entries in Mr Johnson’s official diary were queried by Cabinet Office during preparation for the Covid inquiry.
“Following an examination of the entries, Mr Johnson’s lawyers wrote to the Cabinet Office and Privileges Committee explaining that the events were lawful and were not breaches of any Covid regulations.”
