Tommy Robinson was filmed punching an England fan to the floor as he attended last night's game against the Netherlands in Portugal.
The EDL founder and former leader was spotted wearing a camo jacket outside the Estádio D. Afonso Henriques in Guimarães ahead of the match.
As Robinson and members of his entourage walk around the ground, fans approach to ask for photos before he suddenly lashes out at one of them.
Video seems to show Robinson shouting 'who said that' at a group of men walking ahead of him before the punch is thrown.
Tommy Robinson was caught on film hitting an England fan in the face outside the Estádio D. Afonso Henriques in Portugal ahead of England's game against the Netherlands
As one of the group turns around, Robinson hits him in the face, sending him sprawling to the floor as friends step in to protect him.
In the aftermath of the punch, Robinson - real name Stephen Yaxley-Lennon - walks calmly away as a man's voice is heard saying: 'You'll get knocked out again, bruv.'
Other supporters can be heard shouting: 'Go on, Tommy lad.'
It is not clear what happened after the video finished, or whether Robinson was allowed into the stadium.
England went on to lose the game 3-1 in extra time, knocking them out of the Nations League tournament.
Robinson had uploaded a video of himself to social media wearing the same jacket and saying he was in Portugal to watch the game before the match started.
The EDL founder and former leader was walking alongside fans when someone appears to have made a remark to him, prompting him to lash out
Robinson recorded a video of himself ahead of the game wearing the same jacket and saying: 'I'm in Portugal, going the game. No football banning order here mate'
In it, he winks at the camera, saying: 'I'm in Portugal, going the game. No football banning order here mate.'
The remark is a reference to the banning order he was handed in 2016 for waving a flag reading 'f*** ISIS' at a Euros match.
Bedfordshire Police issued him with a football banning order on
