TOMMY Robinson spent the night in police cells after he was arrested following an incident in Barrow.
Mr Robinson - whose real name is Stephen Yaxley-Lennon - is among four men in custody.
The men, from outside the county, were arrested last night following a report of an assault.
Cumbria Police received a call reporting an assault on a man at Hollywood Retail Park shortly after 8.30pm.
Mr Robinson was in Barrow to film a mass show of support following allegations of an Asian grooming gang in Barrow.
Officers responded and arrested four men shortly afterwards in the Douglas Street area of Walney.
Videos shared on social media showed Mr Robinson talking to police.
A man aged 43 from the West Midlands area, a man aged 47 from the North Wales area and a man aged 28 from the Bedfordshire area were arrested on suspicion of a public order offence.
Mr Robinson, 37 and from the Bedfordshire area, was arrested on suspicion of assault and a public order offence.
All remain in police custody this morning.
There were a number of people in the area at the time and officers are keen to hear from anyone who witnessed what happened or the moments immediately before or after.
Email: 101@cumbria.police.uk
Call non-emergency number: 101
Or Crimestoppers anonymously on 0800 555 111.
Always call in an emergency 999
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