Supporters of Tommy Robinson confronted police outside the Old Bailey after the English Defence League founder was sentenced to nine months in prison for contempt of court.
The far-right activist, whose real name is Stephen Yaxley-Lennon, will spend 19 weeks in jail after already having served time in prison for the crime.
Huge crowds gathered to condemn the sentencing, of which the 36-year-old will serve half, with some pushing police and setting off flares before the hearing.
Many can be heard in video footage chanting 'free Tommy' and 'we want Tommy out', while holding up placards and blocking the street with a double-decker bus.
A stage was also erected, with speakers to address the crowd including former UKIP leader Gerard Batten and TV personality Katie Hopkins in attendance.
Supporters of Tommy have also taken to social media to voice their support and have started the #freetommy hashtag on Twitter.
Robinson, who entered the Old Bailey sporting a 'convicted of journalism' slogan t-shirt, was sentenced for Facebook Live streaming footage of defendants outside court, who were accused of the sexual exploitation of young girls in Huddersfield in May of last year.
On the day of the broadcast in 2018, he was jailed for 13 months after being found in contempt of court, where he then served 10 weeks in jail before being freed after the original finding of contempt was overturned by the Court of Appeal in August.
His case was referred back to the Attorney General, who announced in March this year that it was in the public interest to bring new proceedings against Robinson.
Dame Victoria Sharp said that the reason for the penalty for contempt was 'punishment and deterrence' and that the court is also determined to uphold the rule of law and 'ensure future compliance with orders of the court'.
Passing the sentence, Dame Victoria said: "We are in no doubt that the custody threshold is crossed in this case, in particular having regard to the common law contempt that the respondent committed.
"Nothing less than a custodial penalty would properly reflect the gravity of the conduct we have identified."
