- Video report by ITV News Correspondent Martha Farlie
Hundreds of thousands of people who support a second EU referendum are marching on Parliament to demand a vote on Boris Johnson's Brexit deal.
Some protesters in London also took aim at the prime minister’s "puppet master" Dominic Cummings on a bumper day for British politics.
An effigy brought by People’s Vote demonstrators depicted Mr Cummings as a demonic figure holding a cartoon model of Mr Johnson.
The model of the former Vote Leave campaign chief had the words “Demonic Cummings” written on his head and “Master of Muppets” emblazoned below.
A number of celebrities and politicians have joined the march, with London Mayor Sadiq Khan pictured alongside Star Trek legend Sir Patrick Stewart and actor Stephen McGann at the front of the crowd as the march set off from Park Lane on Saturday afternoon.
Opposition MPs are also due to address the crowds, including Labour's Jess Phillips and Liberal Democrat Luciana Berger.
Business Secretary Andrea Leadsom said she received "frightening" abuse from anti-Brexit protesters shortly after MPs voted to delay a vote on Mr Johnson's deal.
Footage posted to social media showed both Mrs Leadsom and her Cabinet colleagues Jacob Rees-Mogg and Michael Gove being heckled by People's Vote demonstrators as they left the House of Parliament under police escort.
Boos and shouts of "shame on you" were directed at Mrs Leadsom as she walked down the street surrounded by officers.
Similarly, demonstrators could be heard shouting "shame" as Mr Rees-Mogg and his young son passed the protesters on London's Millbank, while police could be heard urging people to leave Mr Gove alone.
Earlier one protester told ITV News: "It's pretty crucial, isn't it? All on one day, to have all this going on in Parliament and this march at the same time."
She added: "It shows you what a naff crew we've got in charge. He can't even run a Government programme, you know, it's a shambles!
"It's, I'd like to use a swear word but I won't, it's not good enough. We deserve better."