Footage has emerged on Friday showing Tommy Robinson punching a man to the ground during an Asian sex gang protest before being detained by the police.
The video shows the former English Defence League leader, whose real name is Stephen Yaxley-Lennon, apparently punching a man on a bike, who then falls to the ground before a person in the background can be heard saying "Oh my God".
Robinson later told police that he was acting acted in self-defence after the man spat on him and called him a "racist p***k". The footage does not show this moment, however.
The 37-year old was detained following a report to police of the incident at Hollywood Retail Park in Barrow-in-Furness, Cumbria, after 8.30pm on Thursday.
While in custody, he is being questioned on suspicion of a public order offence. He is being detained alongside a 43-year-old West Midlands man, a 47-year-old man from North Wales, and a 28-year-old man from around Bedfordshire.
Robinson later filmed a video and posted it on Youtube in which police officers pull up to this house after seemingly arresting his driver.
"Here we go again" he says before being met at his door by police officers and explained to them that he has witnesses to support the claim that a man spat in his face
"At this point I acted in defence. I didn't know if he had a knife or anything so I made sure he ended up on his bum", he said.
Robinson was in Hollywood shooting a documentary and addressing a rally regarding allegations made by a 19-year-old woman that she was drugged and raped by a grooming gang.