Police have been asked to establish the facts about Dominic Cummings’s movements in Durham during lockdown.
Steve White, acting Durham Police, Crime and Victims’ Commissioner, said he had asked Durham Police to look into what happened “concerning any potential breach of the law or regulations.”
In a statement he said it was vital the force show “it has the interests of the people of County Durham and Darlington at its heart, so that the model of policing by consent, independent of government but answerable to the law, is maintained.”
Mr White said he was confident the force had responded proportionately and appropriately so far.
But he added that there was now a “plethora of additional information” in the public domain which deserved appropriate examination.
He added: “I have today written to the Chief Constable, asking her to establish the facts concerning any potential breach of the law or regulations in this matter at any juncture.”
It would be for the Chief Constable to determine the operational response to this request, he added.
Earlier Education Secretary Gavin Williamson sidestepped questions about whether or not Mr Cummings took a sightseeing trip while he was in Durham.
The government has admitted the prime minister’s most senior adviser drove 260-miles to stay near family while the country was in lockdown.
Mr Johnson has said he did the right thing because he was seeking childcare for his young son.
But questions also remain about whether or not Mr Cummings stopped during the four hour car journey.
Mr Johnson has defied calls from his own MPs to sack Mr Cummings.
But he is facing mounting pressure to order a Whitehall investigation to establish the facts of the case.