Yesterday’s march was organised by the People’s Assembly campaign group.
English Unite the Union General Secretary Len McCluskey addressed the anti-austerity rally in Parliament Square.
Actor and comedian Russell Brand addressed the rally. He said: “This will be a peaceful, effortless, joyful revolution and I’m very grateful to be involved in the People’s Assembly.”
He put on a T-shirt in support of the Fire Brigades Union during the protest.
He was joined by, among others, Caroline Lucas MP and journalist Owen Jones.
Jones said: “The Conservatives are using the crisis to push policies they have always supported. For example, the sell-off of the NHS. They have built a country in which most people who are in poverty are also in work.”
Protesters expressed anger on social media that the march had not been covered by mainstream broadcasters like the BBC. A spokesman for the police said the force had received no reports of any arrests.