The BBC reports that sources close to Cummings deny he broke any rules, and that he and his family "had made the trip because his parents could help care for his young child while he and his wife were both ill with symptoms of coronavirus".
Days after Boris Johnson evaluated favorable for coronavirus, policemans presumably approached his vital advisor to clarify the lockdown rules as well as guidance versus non-essential traveling after he was found some 375 kilometres north of the funding.
The details of Mr Cummings's Durham visit only added to scrutiny of No 10.
At the time, Johnson's government was advising people to only go out for essential purposes to slow the spread of coronavirus, and for anyone with symptoms to stay at home.
The story was first reported on Friday following an investigation by The Guardian and The Mirror.
According to a joint investigation by the Guardian and Daily Mirror, Mr Cummings was spotted twice in the North East over the course of nearly a week, between March 31 and April 5 - eight days after lockdown began.
The spokesperson continued: "Officers made contact with the owners of that address who confirmed that the individual in question was present and was self-isolating in part of the house".
Durham Police say officers went to a house on March 31 and "explained to the family the guidelines around self-isolation and reiterated the appropriate advice around essential travel".
Cummings, who masterminded the 2016 campaign to leave the European Union during the Brexit referendum, travelled the 250 miles to Durham in northern England in late March, when a strict lockdown was already in place, the Guardian and Mirror newspapers reported.
The 55-year-old said he would deem "lockdown over" if the Prime Minister doesn't take drastic action towards his top adviser.
Downing Street has made no official comment on the matter.
Durham police confirmed officers had spoken to the owners of an address in the city after reports a person had travelled there from London.
"I got the shock of my life, as I looked over to the gates and saw him", they said.
"There was a child, presumably his little boy, running around in front".
Dominic Cummings may have some explaining to do.
He was then next photographed on 14 April, at Downing Street.
"I recognised Dominic Cummings - he's a very distinctive figure". "Mr Cummings believes he behaved reasonably and legally".
Sir Ed Davey, acting leader of the Liberal Democrats, has called for Mr Cummings to quit over the allegations. "It's as simple as that".
The Labour Party said in a statement that "the British people do not expect there to be one rule for them and another rule for Dominic Cummings".
A spokesman for the party said: "If accurate, the Prime Minister's chief adviser appears to have breached the lockdown rules". "The federal government's assistance was really clear: remain at residence as well as no non-essential traveling".
Dominic Cummings, the British Prime Minister's chief aide, was spotted breaking lockdown rules.
Cummings is considered a key member of the 2016 pro-Brexit campaign and the man responsible for helping Johnson become prime minister past year.
As of 9am on Friday 22 May, there are 1,898 confirmed cases of COVID-19 in County Durham, out of a population of around 530,000.
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