Several supporters of Tommy Robinson have been arrested following clashes with police after he was jailed for contempt of court.
Robinson’s hearing was delayed for about 10 minutes after he was mobbed by fans as he arrived for sentencing at the Old Bailey.
Supporters then marched towards the court, chanting “we want Tommy out” and booing when his nine month sentence was handed down.
Some in the crowd began pelting police with bottles and cans before they made their way to Parliament Square.
Journalists filming the protest said they were verbally abused, intimidated, and had their equipment attacked before police arrived.
Clashes continued outside Westminster Abbey after one protester was pinned to the ground by police before being placed in the back of a van.
Others in the crowd confronted officers in riot gear and sat on either side of the van to stop it moving.
London Police said they arrested three people outside court and another in Westminster, but that their alleged offences were committed last Friday.
A woman and two men were arrested for affray, and one woman was arrested for a public order offence.
Police also confirmed a further four people were arrested on Friday for affray.
Robinson has urged his supporters to protest outside “whatever prison” he is sent to.
He has been sentenced to nine months in jail for filming inside a courtroom.
However the judges accounted for time already served, meaning he could be out in less than 10 weeks.