A pro-EU rally in Westminster saw hundreds of chanting protesters shout "Down with Boris" with a vehemence that stormed a live news broadcast.
Channel 4 presenters were left astounded as people gathered behind them in what became the biggest EU protest to storm the capital yet.
Another broadcaster tweeted: "Extraordinary - a pro EU remain protest stormed Westminster as we were live on air.
"Has Britain ever seen a pro EU protest!?"
The rally, which took place on Tuesday (June 28), was organised on social media before being cancelled. However, that was not enough to put off those keen to make their voices heard against Brexit.
It saw people walk from Trafalgar Square to Westminster holding banners largely targeted at Leave campaign figureheads Boris Johnson and Nigel Farage.
It comes just days after the country voted to leave the European Union despite London largely voting to remain, in an historic referendum which saw 1.2 million more vote to leave.
Thousands rally behind Jeremy Corbyn at Westminster
If it's not the outcome of the referendum, it's the Labour party 's inner storm causing an uproar with London's politically charged residents.
Around 10,000 people attended a protest in Westminster on Monday (June 27) in support of leader Jeremy Corbyn as he faces mounting pressure to resign following a Cabinet exodus where a chain of members stepped down.
Organised by grassroots Labour network Momentum, outraged Corbyn supporters stormed the streets of London, claiming a political coup to dethrone the leader was unacceptable.
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West London MPs Andy Slaughter and Seema Malhotra also handed in their resignation as shadow Justice Secretary and chief Secretary respectively, with both admitting they believed the party needed someone new to take the helm.
Rumours of Hayes and Harlington MP John McDonnell replacing Corbyn were quashed after he announced his support for the leader, saying he should not step down when "172 people cannot weigh a quarter of a million others."