Rishi Sunak has said he deeply regrets not wearing a seatbelt last week as a passenger in a moving car.
On Friday, Lancashire Constabulary announced it was fining the prime minister after he was spotted not wearing a seatbelt in an Instagram video to promote levelling-up funding during a visit to the county.
The police force did not reveal how much Mr Sunak was fined, but fixed penalty notices for seatbelt offences are usually £100, rising to up to £500 if taken to court.
The PM agreed to pay the fine and Downing Street issued an apology on his behalf.
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Asked on Monday during a visit to Berrywood Hospital in Northampton whether he would personally apologise for his actions, Mr Sunak said: “Yes, I regret not wearing a seatbelt.”
Mr Sunak was also asked whether the public could trust him to follow the “laws of the land”, and he replied: “Of course I do (follow the law).
“In this instance, I made a mistake which I regret deeply and that’s why I apologised straight away.”
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This makes him the second serving prime minister – after Boris Johnson – to be found to have broken the law while in office.
Mr Sunak has previously been fined by the Metropolitan Police for breaking lockdown rules. Last year he was caught up in the “partygate” scandal, receiving a fine alongside Mr Johnson for attending a gathering to mark the then-PM’s 56th birthday.
Labour has criticised Mr Sunak for failing to wear a seatbelt, branding him a “total liability” and “hapless”.
Liberal Democrat deputy leader Daisy Cooper said: “From partygate to seatbelt gate, these Conservative politicians are just taking the British people for fools.”
Mr Sunak’s premiership has been hit with a series of controversies since he entered Number 10 in October.
He is facing calls to sack Nadhim Zahawi as Tory party chairman after details of a multi-million pound tax dispute emerged.
Mr Zahawi settled his tax issue with HMRC while he was serving as chancellor, a government source has told Sky News.