A petition calling on Dominic Cummings to be sacked has received more than one million signatures.
The Prime Minister's senior advisor travelled 260 miles to Durham with this four-year-old son and his wife, who was sick with a suspected case of coronavirus, to be closer to relatives.
While in Durham he drove 26 miles from his parents’ house to Barnard Castle 'to test his ability to drive' because he was apparently concerned about his eyesight.
Durham Police concluded that Mr Cummings' trip to Barnard Castle 'might' have been a breach of lockdown measures but decided no further action was required.
His March trip during lockdown has sparked outrage amongst opposition and some Conservative MPs with many saying they have been inundated with messages from constituents about the issue.
This evening there were reports the Downing Street aide was on his 'last chance' with the Prime Minister.
The petition on Change.org named " Dominic Cummings must be sacked" has now received 1,065,503 signatures.
It was set up by a user called Gary Kelly on May 25.
It states: "The PM's chief aide Dominic Cummings is facing calls to resign after it emerged he travelled from London to his parents' home in Durham with coronavirus symptoms during lockdown."
Prime Minister Boris Johnson has so far stood by Mr Cummings and said he acted "responsibly, legally and with integrity."
In an extraordinary press conference on bank holiday Monday Cummings, who said he had not considered resigning, admitted it was "reasonable to say that other people would have behaved differently" - but said there were exceptional circumstances to justify the trip.
He denied breaking the rules, and claimed he had not broken the "spirit" of the rules, saying: "I did what I thought was the right thing to do."
A separate petition in support of Dominic Cummings has received almost 40,000 signatures.
A YouGov poll published this week showed a majority of the British public think he should resign.
A total of 59% of the public believe he should resign while 27% say he should not resign, with the rest saying they don't know.
Earlier today during the daily press conference, the deputy chief medical officer Professor Jonathan Van-Tam was asked by the Observer's Tony Helm about the trip to Durham and Barnard Castle.
He said: "In my opinion the rules are clear and they have always been clear.
"In my opinion they are for the benefit of all and they apply to all."
Meanwhile Culture Secretary Oliver Dowden said: "Dominic Cummings gave a very extensive explanation of his behaviour on Monday and answered all questions in relation to that.
"The Prime Minister accepted that explanation and on that basis kept him in post and that remains the position."