“There was a time where you would be embarrassed to go on a protest.”
The March for Unity demonstration is being planned for July 30. Earlier this month an estimated 35,000 people attended the March for Europe rally in central London.
Among those attending were musician Bob Geldof and journalist and TV presenter Billie JD Porter.
Geldof, who famously clashed with Nigel Farage during the EU referendum campaign, urged people to take to the streets to vent their anger over Brexit.
He told the crowd: “Let’s get real. Going online and tweeting your indignation is only venting into the ether.
“It achieves nothing. Come out. Take action amongst your friends, work colleagues and in your neighbourhoods.
Labour peer Michael Cashman told the crowd: “We need to uphold the values of democracy and inclusiveness which are at the heart of the EU and this country.
“Decent British values are also the values of the European Union.”