Some protesters wrap themselves in the flag of the European Union and noisily interrupt politicians' television appearances. Others yell "Nazi" and "traitor."
Britain's lawmakers are split on how to handle Brexit but they agree that the atmosphere in the public spaces outside parliament — often populated with angry demonstrators — has become ugly and intimidatory.
This increasingly raucous brand of street activism has raised questions about what has happened to British politics in recent years, and where the boundaries of free speech now lie.