At least 670,000 are holding anti-Brexit demonstration in London, BBC reported.
London Mayor Sadiq Khan joined students, families, health workers and scores more for Saturday’s march, which ended with a rally at Parliament Square.
The mayor of London called what is happening a historical moment in democracy.
"What could be more democratic, what could be more British, than trusting the judgement of the British people," he aded.
According to him, this is the moment when thousands of people gathered from every corner of the country in London to be heard.
First Minister of Scotland Nicola Sturgeon sent a message of support to the rally, saying the SNP would support a vote that would give the option of staying in the EU.