A few thousand anti-government protesters donned yellow jackets on Sunday and marched a kilometre through central London.
They called on Prime Minister Theresa May to resign for her government's massive cuts to welfare, education, the National Health Service and other services.
In Trafalgar Square a few of them clashed with a few pro-Brexit protesters who were also wearing yellow vests.
The vests are a sartorial symbol of anti-government protest in France.
Police said they made one arrest after a man assaulted a police officer.
