In Pics: Protesters in London Demand Halt to Brexit

Marchers carried European Union flags and signs praising longstanding ties between Britain and continental Europe.

The “People’s Vote March” on Saturday, 23 March, snaked from Park Lane and other locations to converge on the UK Parliament.

(Photo: AP)

Anti-Brexit protesters flooded into central London by the hundreds of thousands, demanding that Britain's Conservative-led government hold a new referendum on whether Britain should leave the European Union.

The "People's Vote March" on Saturday, 23 March, snaked from Park Lane and other locations to converge on the UK Parliament, where the fate of Brexit will be decided in the coming weeks.

Marchers carried European Union flags and signs praising the longstanding ties between Britain and continental Europe. The protest drew people from across Britain who are determined to force Prime Minister Theresa May's government to alter its march toward Brexit.

Independent legislator Chuka Umunna and others supporting a second Brexit referendum estimated the crowd was 1 million strong.

An effigy of British Prime Minister Theresa May is wheeled through Trafalgar Square during a Peoples Vote anti-Brexit march in London, Saturday, 23 March. The march, organised by the People’s Vote campaign is calling for a final vote on any proposed Brexit deal. This week the EU has granted Britain’s Prime Minister Theresa May a delay to the Brexit process.

Effigies of British Prime Minister Theresa May and Conservative politicians Boris Johnson and Michael Gove, from right, and displayed during a Peoples Vote anti-Brexit march in London.

A puppet of British Prime Minister Theresa May lays on the floor next to discarded placards in Whitehall during a Peoples Vote anti-Brexit march in London on Saturday, 23 March.

Demonstrators carry posters and flags during a Peoples Vote anti-Brexit march in London on Saturday, 23 March.

Demonstrators sit next to one of the lions in Trafalgar Square during a Peoples Vote anti-Brexit march in London on Saturday, 23 March. 

An effigy of British Prime Minister Theresa May is wheeled through Trafalgar Square during a Peoples Vote anti-Brexit march in London on Saturday, 23 March. 

A large banner is unfurled along Whitehall during a Peoples Vote anti-Brexit march in London on Saturday. 

Demonstrators make their way through Trafalgar Square during a Peoples Vote anti-Brexit march in London.

Demonstrators make their way through Trafalgar Square during a Peoples Vote anti-Brexit march in London.

Thousands of demonstrators crowd the streets during a Peoples Vote anti-Brexit march in London.

A demonstrator in an astronaut suit carries a sign during a Peoples Vote anti-Brexit march in London.

A demonstrator sits on one of the lions in Trafalgar Square during a Peoples Vote anti-Brexit march in London.

(With inputs from AP)