Tommy Robinson, the founder of the far-right English Defence League, has been jailed for 13 months for contempt of court.
The 35-year-old's sentence can be revealed after a judge lifted reporting restrictions on the case on Tuesday. The case had been widely discussed on social media, where rightwing activists claimed that the restrictions amounted to state censorship.
Robinson was arrested on Friday after broadcasting an hour-long video over Facebook from outside Leeds crown court. In the video he made comments that risked causing a trial to collapse.
Robinson pleaded guilty to contempt of court. He was arrested, charged and sentenced within five hours.
A court order is in place to prevent any reporting of the details of the trial in question.