Tommy Robinson has been sentenced to 13 months in jail for contempt of court.
His sentence has been revealed for the first time today, following a request from the Independent and other publications to lift reporting restrictions on the case.
Robinson was arrested of Leeds Crown Court on Friday. The arrest was filmed and shared on Robinsons' Facebook page. In the clip he can be heard asking one of his supporters: "Can you get me a solicitor?"
At court he admitted committing contempt of court by publishing information that could prejudice a trial.
Robinson, real name Stephen Christopher Yaxley-Lennon, was already under a suspended sentence over a contempt of court during a gang rape trial in Canterbury last year.
In the clip from last Friday, the arresting officer can be heard telling Robinson: "You are being arrested on suspicion of causing a breach of the peace."
Robinson, who founded the English Defence League in 2009 before quitting 2013, tells him: "This is ridiculous, I haven't said a word. I've done nothing."
Adding: "Someone laid their hand and assaulted me outside court.
"Other people have sworn at me and threatened me about my mother and here I am being arrested for saying nothing."
Following the arrest, hundreds of his supporters arrived at Downing Street carrying banners with phrases such as '#FreeTommy' and 'White lives matter', demanding his release.
Footage of the demonstrators outside Downing Street on Saturday shows scores of people shouting, chanting and singing. In one clip, a man is lifted on to the top of the gates, while onlookers shout, 'shame on you' to authorities.
Online people used the hashtag #freetommy to share photos of themselves at the protest, and a petition to release Robinson has reached over 450,000 signatures.