Boris Johnson has insisted the fresh claims he broke lockdown rules are "total nonsense" and that elements of his ministerial diary were "cherry picked and handed to police".
The former prime minister was confronted by Sky News about the allegations as he made his way to the Dulles International Airport in Washington following a brief tour of the US.
Asked if he broke the rules he said: "I just think it's totally nonsensical and bizarre that there are tens of thousands of entries in the the Prime Minister's diary. I've never seen these things before.
"I have looked through it. None of them constitute a breach of the rules during COVID, they weren't during lockdown.
"They were during other periods of the restrictions. None of them constitute a breach of the rules. None of them involve socialising. It is total nonsense."
On Wednesday, Mr Johnson was referred to the police by the cabinet officer over potential further lockdown breaches in Downing Street and Chequers during the pandemic.
Mr Johnson, who believes he is the victim of a "politically motivated stitch-up", has ditched the government-appointed lawyers representing him in the COVID-19 public inquiry after concern was raised about events in his ministerial diary.
Mr Johnson is in the US this week.
On Thursday he met Donald Trump "to discuss the situation in Ukraine and the vital importance of Ukrainian victory", the former Prime Minister's spokesman said.
It is not clear where the meeting took place, but it happened whilst Mr Johnson was on a tour of the US, stopping off in both Texas and Las Vegas.
The two leaders have known each other for many years, and worked together when Mr Trump was US president and Mr Johnson was in charge at Downing Street.
Mr Trump has spoken highly of Mr Johnson and earlier this month called him a "wonderful guy" and "a friend of mine".
However he cast doubt on a political comeback while claiming the Conservatives had gone "far left" and "too liberal" under his leadership.
He previously told GB News: "I liked him so much, I still like him, but he really went a little bit on the liberal side.
"He all of a sudden became an environmentalist and I'm talking about probably in a negative way, too much."
The two have previously been aligned on policy issues, such as Brexit, but they have also diverged in recent years, most notably on Ukraine.
Mr Johnson was still prime minister when Russia invaded its southern neighbour last February and was a leader in helping rally international support for the Ukrainian people and its military.
Meanwhile Mr Trump - who has touted his "very good relationship" with Russian President Vladimir Putin - has something of a chequered history involving Ukraine, dating back to before Moscow's invasion last year.
In September 2019, reports emerged he had asked Ukraine's President Zelenskyy to investigate then former vice president Joe Biden, who was expected to run against him in the 2020 presidential election.
That phone call led to Mr Trump's first impeachment on charges of abuse of power and obstruction of congress - but he was not convicted after a trial in the Senate.
Earlier this month, in a town hall conversation broadcast as part of his 2024 presidential campaign, Mr Trump - who is running to be the Republican candidate again - refused to say who he thinks should prevail and said he'd end the war in just 24 hours.
He said: "I want everybody to stop dying. They're dying. Russians and Ukrainians. I want them to stop dying. And I'll have that done in 24 hours."2023-05-26T21:58:35Z dg43tfdfdgfd